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Refrigerator fire

So my Refrigerator caught on fire... it was weird. I was getting ice out of the freezer when I noticed the light was flickering, then I remembered the light burned out months ago, that was my biggest clue. And it explained the crackling sound I was hearing. I unplugged it before it got out of control or anything, and nothing was damaged.... Has anyone else had their fridge catch on fire?

Topic by drinkmorecoffee    |  last reply

Refrigerator Insulation?

Background: I was looking at Costco and they have their big semi-rugged totes on sale this time of year for like $6! The thing I'm pondering is sticking one in inside another and filling the space between with insulation.  But what to put in between? You're probably thinking what I'm thinking, Pinky:  Spray it full of Great Stuff foam. But then I'm looking at my fridge going... that thing is literally freezing inside and not even cool to the touch on the outside!  What kind of insulation do they use?  I'm guessing something trickier than Great Stuff, what with Energy Star ratings and all.  In short:  What is it and where can I get some!??

Topic by PS118    |  last reply

evaporative ammonia refrigerator

I was wandering if anyone knows how to make an ammonia evaporator refrigerator system. I am looking for something that is equivalent to commercial ammonia evaporator refrigerators. Thanks

Topic by microsuperman    |  last reply

Re-purposing a refrigerator

I am re-purposing a refrigerator to make an egg incubator. What crossed my mind was that perhaps rather than using another source to heat it, perhaps the chiller system (which is fully intact and working) could be reversed? Has anyone on here undertaken a project which involved deliberately causing a refrigerator to work in reverse and so heat up inside? Any information would be gratefully received.

Topic by grumpydad    |  last reply

Custom Refrigerator Skin

I wanted to figure out how to create a skin for large items such as refrigerators, washing machines,  etc.   I am having trouble conceptualizing the necessary steps to completely hide cosmetic blemishes on large machines and appliances.  Would creating a skin be a good solution?  I am guessing there is a more elegant way than simply placing a large image printout underneath glass?  Also FYI, some of the appliances are completely brand new so I would ideally want a "top layer" solution as opposed to a "painting" solution. Nice to have features: 1.  weather proof 2.  Can be easily swapped with new design

Topic by adacquel    |  last reply

Refrigerated Dog Bed

Ahoy-hoy, My first post on Instructables! Anyhow, we own a 10-month old Great Pyrenees and live in the drought stricken and warm Southern California climate. As summer approaches we have been looking at options to help keep her cool and we haven't had the greatest of luck with cooling beds available on the market, our Coonhound tore up the first one as a 50 lb pup during his first summer. I was thinking about potentially re-purposing an old mini-fridge coolant system into a cooling bed. My very initial thoughts are as follows: 1. Salvage working mini-fridge 2. Disassemble cooling system 3. Create bed surface using sheet metal (our Pyr won't sleep on the any of the multiple plush beds available to her, only concrete or dirt) 4. Create mount base for bed, ideal scenario would have a force sensitive switch that would only turn on refrigeration unit when dog is on the bed. 5. Thermally attach refrigerator expander coils to the underside of the bed, most likely via solder but could bolt together with thermally conductive paste 6. Rig up an enclosure and support structure for the compressor, heat exchange coils, and electronics. I imagine the bed surface resembling the weight scales at the vet but with some provisions to attach a padded fabric cover. Things to be addressed: 1. Ensuring proper temperature regulation...she has a thick durable coat but don't want to over due things. Temperature feedback shouldn't not be too much of a hurdle using an Arduino or using the existing "twisty-turny" nob in the fridge 2. Properly disassembling the salvaged fridge, don't want to unnecessarily release the refrigerant and defeat the whole purpose 3. Make this thing sturdy enough to survive the wear and tear of one and/or probably two 85 lb plus dogs Is this too far fetched (no pun intended, my dogs aren't retrievers)? Any thoughts and advice would be greatly appreciated. Thanks, Rich 

Topic by richardwdyer    |  last reply

The next generation of Refrigerator Magnets

My Mom has started her own business - an online business! Refrigerator ReferenceThis is cool, she is selling the next generation of refrigerator magnets, not the fun souvenir types, but the helpful ones...Refrigerator Reference is a new range of useful and stylish fridge magnets to inform, entertain and adorn your kitchen. Everything from oven temperature conversion charts, basic recipes, seasonal produce, ingredient substitutions, and food additives to baby basics, pet information, hangover cures, natural cleaners and much more.All of her magnets are Environmental Friendly, and she also offers 'Reduce Your Carbon Footprint' magnet FREE to every customer!

Topic by Plasmana    |  last reply

Frigidare / Electrolux FRT04L5DB0 Refrigerator

Anyone know how to get the freezer door apart to switch the hinge on this unit?

Topic by Red Gym    |  last reply

Refrigerant r-22 tank

I have acces to a lot of r-22 tanks already empty.  What can i do with them? Are this things safe for making a grill or to cook inside  of them? Proper recycling is not an option since no one in this country do that. 

Topic by ElmoRoyD  

How do refrigerators work?

I've always wondered what keeps my beers cool and my cheeses fresh. Now I'm new to Instructables, but on the advice of a good friend, I thought I'd post this here:   I love to figure out, research, how stuff works. And then figure out how to tell that story. This one animation has a bit of a story itself, because it turns out I made the first version a bit too fast... I didn't do my research properly. Anyway, so here it is. I'm curious to know what you think!

Topic by Sebvandenbrink    |  last reply

what is the easiest way to make a refrigerator fit into a space that it is barely too big for?

We took the old refrigerator out and tried to put a refrigerator in that we had in our old house but it is about 1/2 inch to wide. What would be the easiest way to make it fit. The kitchen counter is causing the problem and there is plenty of room on the top.

Question by mccroan2    |  last reply

I want to rewire a refrigerator light for a project. Can I turn this into a wall socket? ?

For a regular light I know this is possible. Maybe it's better to take it apart and wire it? What are the things I should know before attempting this?

Question by prismspecs    |  last reply

How do I dismantle a refrigerator??? Answered

I want to dismantle an old 'Slush Puppy' machine and remove the refrigerator, leaving only the mixing tank, motor and frame. Bearing in mind refrigerant is R404A, and I will need to cut the refrigerant lines to do it, is it a job I can/should undertake myself? If it is, what is the best way of going about it, and if not, who should I contact to do it for me??

Question    |  last reply

Compressor-free refrigerator may loom in the future

. From Compressor-free refrigerator may loom in the future at Penn State Engineering via Slashdot:University Park, Pa. - Refrigerators and other cooling devices may one day lose their compressors and coils of piping and become solid state, according to Penn State researchers who are investigating electrically induced heat effects of some ferroelectric polymers."This is the first step in the development of an electric field refrigeration unit," says Qiming Zhang, distinguished professor of electrical engineering. "For the future, we can envision a flat panel refrigerator. No more coils, no more compressors, just solid polymer with appropriate heat exchangers."

Topic by NachoMahma    |  last reply

Is it possible to create a filter for a water-dispensing refrigerator?

We have a refrigerator that dispenses chilled water. However, our landlord failed to equip any sort of filter, and the tap where I live tastes gross. Does anyone have a suggestion on how we can make a water filter for our refrigerator for less than $30?

Question by boston515    |  last reply

how do i fix a broken refrigerator? Answered

Yesterday evening I heard something that sounded like an electrical short. Then I started smelling that smell that happens when something shorts out (burning electrical odor). Now my refrigerator/freezer is getting warmer and warmer. You can hear it trying to "cycle on", but then nothing happens. Someone told me it was probably just a switch. Any suggestions on trouble-shooting this problem?

Question by gotchers    |  last reply

how can I remove a refrigerator's pump in environmentally responsable way?

I have an old refrigerator which still works on CFC's, and I need it's pump. How can I remove it witout releasing the CFC's inside?

Question by tgferreira184    |  last reply

Sub Zero refrigerator model #KSSS 42DMX 05 does not restart after defrost.?

Will not come out of defrost mode every few days. This is an intermittent problem.

Question by morpheus2011  

How to repair, not replace, refrigerator door seal?

We have a 1972 Coldspot 3 door refrigerator/freezer that has leaking door gaskets that are causing condesation and mold growth on the outside of the door. My father loves this 40 year old "antique" but for the cost to replace the 3 magnetic door seals, about $200.00, we can by a pretty nice used late model fridge.  Is there any way to tune up the old magnetic seals to function properly again. I am considering adding a form a gasket or silicone to the existing seal surface and closing the door onto an oiled or waxed surface to create a "custom fit". Any thoughts would be appreciated.

Question by dwj_jackson    |  last reply

How to magnetize new refrigerator door gasket????

Refrigerator door gasket came unmagnetized. Very expensive, and, royal frustration thus far. Got the thing installed okay, but there is no 'seal'. Supposedly, according to Whirlpool, they don't need magnets in the fridge door gaskets to seal.....(Yeah, right) Any way to make a gouzer? Figured I could depend on help here. If I had enough magnets, I'd make my own. Also, why are the gaskets on the door?

Question by littleangels    |  last reply

Will a refrigerator compressor run when on it's side?

I'm building a Keg-erator out of a used Bourbon Barrel. I've stripped the guts from a 'Dorm Fridge' and planned on using it as my cooling element, but when I plug it in, it only runs for about 10 seconds, then shuts off. I tried to make sure the grounds were attached to: (first the metal bands on the barrel, then second the piece of metal, then onto the floor). I'm wondering if the fact that the compressor is now on it's side has anything to do with it, or if it is in fact a grounding issue. The outlet does not trip when plugged in. Anyone have any ideas?

Question by WKrottIII    |  last reply

Help with Refrigeration for a (Very) Custom Bar Top

The gist of this question is this: How do I calculate the size compressor rig that I need for a cooling system? The larger context is this: I am building a bar in my living room that has some special features - Namely it has a "cold strip" running across the top of the bar - which amounts to a 4 inch wide strip of chilled copped built into the bar top- to keep your drink cold; as well as two vodka wells - which each hold a bottle of vodka in a frozen bath of (cheaper) vodka (under a glass dome). The bar top is made of Styrofoam and composite materials (I used to make Surfboards) and is basically seamless. The copper tubing will be built into the bar top - under the composite and soldered to a copper plate - which is built into the composite.... you get the picture. I have built "frozen" sculptures in the past using old fridges that I have disassembled and then re tubed. In the past I have always just winged the amount of tubing I used and thus far - have gotten away with it, and the sculptures have always worked. This time though I am buying the compressor new and want to match the unit to the need - but I have no idea how to calculate the needed compressor to the job. Any help would be great. Thanks! And Yes, I will post the Instructable when the bar is completed. :)

Topic by Rogue Gourmet    |  last reply

What type of paint to use for painting a landscape art painting on a refrigerator (with brushes)?

I would like to paint an actual painting on the front of my refrigerator. I need to know what kind of paint to use for a base coat and then what types of paint I could use for the details. Spray paint is not an option for this, I need to be able to paint with brushes, and all I'm finding online is "how to go from white to black" etc.? Also, if I should use some kind of topcoat to protect the final product.


I want to build a heatpipe to move heat (30 watts/hr) from the interior of my refrigerator to the exterior of my house

during the winter. I am considering using a 1/2 copper tube capped filled with ethanol, water or acetone. I plan on Adding the fluid (how much?)to the open tube heating one end with a torch and soldering on the second cap to seal the tube and create a vacuum. any ideas would be appreciated.?

Question by bmake    |  last reply

After puncture in the freezer, the cylinder on the back underneath water tray is hot

I was deicing freezer in the refrigerator and accidentally puncture. Gas went out for a few seconds. The refrigerator has topped working. When I cleaned the back and trowed away accumulating water, the cylinder beneath is still hot. Any possibilities or repair?

Question by Sharing Fun with WiSH & EmmaS    |  last reply

Heat sink mystery

While harvesting parts from a tiny refrigerator, I found something that I don't understand. There was a heat sink about 6 inches square on the back with a 12v fan attached. Underneath this arrangement was a smaller heat sink about 3 inches square and sandwiched between the two was an aluminum block, also 3 inches square and about 1/2 inch thick. Between the block and the large unit is what appears to be a ceramic tile about 2 inches square, seperated from the larger sink with a thin layer of white foam. This tile is glued very securely to the back of the larger heat sink. What puzzles me are the two wires running from a PCB to the ceramic tile. They disappear into the foam but I can't tell what they connect to. A heat sensor that is attached to the large sink, perhaps? There was a twist knob inside the unit that allowed you to adjust temperature from Min to Max. I don't want to pry off the tile just yet in case this might be something useful in its current condition. This refrigerator is probably more of an ice chest than anything, else. There are no coils on the back and no compressor. The only motor is what drove the fan. There is a drip pan on the back and what looks like a plastic hose connection but I don't know if this tube let water in or out. The whole refrigerator is only about 2 feet cubed. It was powered by a standard grounded AC cord. How did this thing cool? And what do those mysterious wires under the ceramic tile serve?

Topic by Boy Genius    |  last reply

Any ideas on how to fabricate a refrigerator door gasket?

Hi all, I have this old refrigerator that works great except for the gaskets which have shriveled with time. I tried taking to my local appliance salesman and he gave me the producers number and told me to call them. so i tried that and asked for a replacement or how to make one. She told me "We have no parts for your refrigerator. Period. Go talk to your local appliance store." has anyone tried to make one at home/work or have any suggestions? thanks.

Question by R3dfish    |  last reply

Convert freezer ice maker into cold water dispenser

I'm wondering if anyone has ever converted an ice maker to dispense filtered tap water into the refrigerator.  I'm thinking a water line is already run into the ice maker so it could be split off and a hose could be run down into the refrigerator where you could push button dispense water or have it automatically fill a filtered water jug.  Let me know what you think.

Topic by joshthejest    |  last reply


Isn't moving a ~300 lb refrigerator up flights of such stairs very DANGEROUS? .. I know of catastrophic resulting injuries.. I'm thinking of a few design improvements; and wonder if others are too.. Besides the obvious (pictured) need to add good ratchet straps, and a larger dolly, my designs range from better muscular force use, to mechanization....  Also,  can anyone please inform here about gripping, one-way, or ratcheting pulleys?.. Thanks good thinkers.

Question by micit2    |  last reply

Can I mount a fridge from the ceiling? Answered

My parents are moving into a home about a fourth of the size they live in now, since the kids are at college. The kitchen is a sad affair and needs to be torn apart. Even with a fair amount of work, the kitchen will be under 120 square feet. A standard fridge cuts the usable space down drastically and stick out into walking ad working areas.  Under cabinet fridges are being considered, but the below counter cabinet space is limited enough as it it, at best around, 200" linear of 32" deep counter and 90" of 24" deep counter.  The idea hit me when I was searching for fridges that fit under counters when I saw commercial display fridges, and mistook them for ceiling units.  So, is there any way to hang a small fridge from the ceiling? What kind of joists/beams would be needed to keep it from crashing down? Or is this a crazy pipe dream?? Are they just too heavy with all the copper coils and insulation?

Question by eggplanthunter    |  last reply

Has anyone got thoughts using a UPS on a refrigerator? Answered

A friend has a six year old Viking Professional refrigerator that must be manually key-board restarted after a momentary power interruption.   My solution for this bad design is to put a UPS on the refrigerator. After all the refrigerator load is very small and much like a computer load. I plan to size the UPS to the instructions of the fridge circuit beaker .   Anyone with experience ?   A

Question by iceng    |  last reply

can I reverse the cycle on a refrigerator to warm the inside?

So I have just built (mostly) a workshop shed, and it's about time to move in work benches, tables, small appliances, etc.  I want to be able to move some temperature sensitive stuff out, too, and I don't want them to get too cold. I'm probably over thinking this and there's a simpler solution, but a refrigerator is already a well sealed, temperature controlled, shelf. If I could get a second hand or scratch and dent, could the condenser be put on the inside to make a "warm box" for winter?  

Question by harlyquin    |  last reply

Anyone how knows how I can make a mini refrigerator?

Anyone how knows how I can make a mini refrigerator? It has to keep two cans of coke cold. It's for a school project and can't be to expensive, max. 40$. I have acess to special tools if needed. About my english, I know it's bad ;) Thanks for all answers!

Question by murkas    |  last reply

What lubricant to refill a fridge compressor with?

Hey all, I just grabbed a compressor from a fridge that had been badly mangled by a bulldozer at a demolition site, planning to make a vacuum pump or airbrush compressor (or both!) Trouble is, I thought the liquid it contained was leftover refrigerant, and drained it all out. I didn't really have a choice, as leftover freon was gassing out of the compressor (thought it had lost pressure, but there was still a little in the compressor) and it was sputtering the oil everywhere. I held it upside down while carrying it home, and when I got it here, it was apparently empty. Then I found out that what I poured out wasn't liquid freon, but actually vital oil that keeps it alive. The compressor runs fine, but I only tried it for a few seconds for fear of destruction. I have many lubricants here, motor oil, 2-stroke oil, bike chain oil, etc. If I'm to dump an oil into my compressor, any ideas on which is the best call, and roughly how much should it take?

Topic by Rectifier    |  last reply

Can I add a DIY freezer compartment to my fridge?

I've got a large fridge, without a freezer compartment. I only use a small fraction of the space available in the fridge, so I was wondering if I could add a small freezer compartment to the top of it. The filament (or whatever it's called - the cooling bit) takes up the entire back wall of the fridge. It's built into the back, not visible. This is always getting covered with ice, even on low settings (probably because I only really use it to chill water - something to do with condensation, perhaps?), which I take to mean that it's capable of freezing stuff. And sometimes I leave bottles of water too close to the back of the fridge, and they get frozen solid. I was thinking I could maybe attach some kind of drawer to the back of the thing, just to keep ice cream, etc... But what could I make the drawer out of? Would it need to conduct the cool-ness from the filament at the back? Would I be okay to attach it by screwing into the sides of the fridge? (away from the cooling filament) I've spent all day googling for an answer. You're my only hope.

Question    |  last reply

Trying to make a small pizza with refrigerator biscuits. Any ideas?

I want to make a small pizza but not individual size and use refrigerator biscuits as the crust. Any suggestions?

Question    |  last reply

How to repair a hole in a refrigerator curved plastic ice tray?

Our refrigerator ice tray has a 3 inch hole in the bottom. The hole is in the curved part of the floor of the tray. Is there a flexible plastic/acrylic I can use to repair the hole?

Question by readbob    |  last reply

Can someone help me fix an ammonia RV refrigerator ? Answered

This is a 27 year old RV dual power ammonia refrigerator.  It runs on 115VAC or propane until a month ago when the smell of leaking ammonia gave it away. Now it, the Fridge, is ambient temp as the ammonia smell is dissipating. A quick check with a local RV repair said $ 2000 for a replacement :( Any hope ?

Question by iceng    |  last reply

modify wine cooler thermostat refrigerator thermostat operating temperature

Hello. Can someone please tell me how to modify the thermostat on a wine cooler (that uses a compressor). I want to change the temperature from running between 10c-18c to 0c-5c. Please post an instructable or give me ideas- even if generic, it would be helpful.I am specifically trying to modify a baumatic bw18.

Topic by drosengarten    |  last reply

Is there any light that for a refrigerator that is motion activated that runs on external power? Answered

I have a small chest freezer and a mini fridge that I keep things in and i wanted to know if there was a product on the market that could provide lighting to these? I dont want to drill into the units so something battery powered would be ideal, if anyone had an Idea of something that could be made that would be good as well. The closest thing I found was this;=1306905359&sr;=8-2 and it is really close but I thought I would put my problem before this infinitely creative community.

Question by RichardHellyer    |  last reply

Making a mini fridge. How many peltier units do i need?

I want to make a mini fridge rather than spend the $80-100 for one. I wanna make it 3'x2'x2'. How many peltier units would i need and do i need heatsinks for both sides (hot and cold)? Also do i need a converter to change the 120v down to something the peltier units can handle?

Question by sj898    |  last reply

There's a bird under my refrigerator. What do I do? Answered

An hour or two ago, there was a commotion out on my balcony; and then the cat came zooming in, dashing around and knocking things over. She ended up ferociously scrabbling for something underneath the refrigerator. Now, every so often the birds call from out on the balcony, I hear a bird call from the kitchen, and the cat is back to trying to launch an attack on the territory underneath the fridge. I don't really want to have to haul the fridge out from its place, but I don't want a bird trapped under there either. Any ideas?

Question by Gorfram    |  last reply

Idea for a non-ideal Carnot cycle based engine.

Initial Stirling engine conceptFor some time I was contemplating an idea for a Stirling engine that would work quite differently than the other designs that I came across. Whole internal volume of an engine may be viewed as a closed-loop pipe, trombone-like slide mechanism allows this pipe to change its length. Electrical fan replaces displacer and pumps working fluid throughout the engine constantly and in one direction. Some portion of the pipe is replaced with branching structure that consist of two heat exchangers (hot and cold) and regenerator. On both ends of this structure special valves are located that connect one of the structure’s parts to the main pipe, so that whole engine forms one closed-loop. While this happens, both of the unused parts are completely bypassed.This design should have many advantages. Working gas is in constant motion and little energy is wasted on accelerating it. Gas may pass many times through heat exchangers, allowing for much better approximation of isothermal processes. Disconnecting unused heat exchangers from the rest of the engine should minimize volume of dead spaces.There are some drawbacks to. Slide mechanism allows only very small changes of total volume (compression ratio is low), and that limits engine’s ability to operate with higher temperature differences. Piston, which is part of the slide mechanism, and especially valves, are heavy and this makes them unsuited for high speed operation, making the whole engine bulky. I also except that an area of all surfaces that are sliding against each other and produce friction would be higher than in traditional Stirlings.Problems with Stirling cycleIdeal Stirling cycle (Fig. 4) consist of two isothermal processes (constant temperature) during which work is performed, and two isochoric processes (constant volume, no work performed). Isochoric processes function is only to change temperature of the working gas, and this takes a lot of energy to do so (especially if gas with high heat capacity is used). Regular Stirling engines try to minimize this inefficiency with regenerator. But when I tried to analyze this process mathematically, I noticed that even regenerator with very high heat capacity cannot store more than half the energy needed to perform next isochoric process (see lower left part of the spreadsheets for more details).Fig. 5 represents heat pump (or refrigerator) working in a modified Stirling cycle. Isochoric processes represent transfers of heat to and from the regenerator. Rest of the temperature change is performed by polytropic processes, during which heat flows to or from the heat exchangers and also work is performed. I chose to represent heat pump, instead of a engine because engine working with this modified cycle wold require isochoric processes to be performed midstroke (or transfers of heat to regenerator would have to be performed during polytropic processes, when working gas changes its temperature also due to work being performed).Note that I am using word polytropic to indicate processes where gas changes its energy both due to heat transfers and work performed. When special cases of polytropic process are mentioned (isothermal, adiabatic, isochoric) I use their specific names.Solving those problems with Carnot cycleLegendary Carnot cycle consist of two isothermal processes (just like Stirling cycle), but changes of temperature are accomplished by the adiabatic processes (no heat transfers with the surroundings), instead of isochoric ones. This has huge advantage, because when energy is added to the working gas during adiabatic compression, all of it can be later recovered during adiabatic expansion.Design I previously mentioned can easily be adapted to work as a Carnot engine. Only change that is necessary, is replacement of regenerator with the empty pipe (ADIABATIC PIPE in Fig. 2). When valves connect this empty pipe to the rest of the engine, there is no heat transfer between working fluid and thermal reservoirs. Any changes of engine volume modify temperature and pressure in a approximately adiabatic fashion. To model what happens with the engine I used slightly modified Carnot cycle (Fig.3). Just before adiabatic process end, short polytropic process begins. It is done so that loses associated with valves connecting both adiabatic pipe and heat exchanger to the main part of the engine for a short period of time can be better simulated. Heat pump working in this cycle is shown in Fig. 6.Design detailsEngine uses special valves, which external shape resemble truncated cone. Smaller base of this cone faces main part of the engine, larger one heat exchangers. Inside there is a pipe, with one opening right in the center of smaller base. The other opening is located off-center on the larger base, so it can connect to the one of the heat exchangers or adiabatic pipe (which are situated just like chambers of a revolver’s cylinder in respect to each other). As this engine engine will most likely operate under low RPMs, flywheel will have to be connected through a transmission with very high gear ratio. The flywheel will have to be quite bulky as well. This poses another challenge, as the pressure inside engine’s tubing will be higher than atmospheric, and at least space around the other side of the “piston” will have to be pressurized as well. If only the immediate surroundings will be pressurized, and gears, flywheel, electric motor/generator will be outside of the container, then very inefficient seal will have to be employed. If everything will be located inside the pressurized container, then fast moving parts will be working against dense gas. Pressure in this area ideally should have such a value, so that on every piston stroke energy is both added to the flywheel and extracted from it as to make energy storage requirements more manageable. This requirements may also be further reduced by employing some other energy storage form. And of course exchange of heat between main part of the engine and this pressurized section must be taken into consideration.Then, there is problem of heat exchangers. They can be either large diameter pipes with fins, or smaller diameter ones that are densely packed (this seems to be must popular configuration in Stirling engines). As heat transfer with the outside of the engine takes around half of the piston stroke, it might be a good idea to employ two pumps of heat transfer fluid per each of the two heat exhangers. One would work constantly to transfer heat from some large heat reservoir, the other would transfer heat to the working fluid only when it is necessary. Some another heat exchanger would have to be placed between those two circuits.And there is also a question of the piston. Basic trombone-like version could be replaced by the something similar to the design drawn in Fig. 7, where two parallel tubes, connected by U-shaped piston, are replaced by the coaxial pipes with volute on the outer section that allows connection another parallel pipe. Piston itself has then small tubular part attached which allows working fluid to pass from outer section to the inner section. This design has only one high pressure seal, is possibly lighter, but fan that pumps working fluid will probably need to be more powerful. Problem of sideways motion of the piston must also be analyzed, and it can be either resolved with piston skirts or the crosshead. Interesting aspect of this problem is that while most frictional forces in the engine are mostly independent of the engine speed, forces associated with this sideways motion of the piston increase with engine rotational speed.Another possible improvement would be making adiabatic pipe shorter than the heat exchangers, which would reduce volume of dead spaces.Engine parametersIn case of a engine that uses helium as a working fluid, has minimum volume of 46.7 liters, maximum volume of 70 liters, operates at temperatures of -5°C and 37°C with the speed of 15 RPM you can expect that it will produce 1138W of power at 8.13% efficiency.In the case of heat pump that operates at the same parameters you can expect that it will require 2300W of power and achieve COP 4.95You can find calculations, diagrams and the detailed descriptions inside (it is unfortunate that Instructables do not support uploading .zip files and other file formats any more, and I have to use another website just to upload few spreadsheets).Possible applicationsI started thinking about this concept when considering applications of thermal energy storage. In more northern latitudes largest factor in domestic energy consumption is heating. So, at least in my opinion, any movement toward replacing fossil fuels with renewables should focus on this largest contributing factor. And this actually is quite fine because storing 1 kWh in a tank filled with water, rocks/concrete or simply in the ground is much cheaper than storing it inside lithium-ion batteries. And general idea behind this low temperature engine, was that some part of this large amount of energy stored to be later used to heat buildings, could be converted into electricity.It should also be able to work in reverse as a heat pump or refrigerator.

Topic by rarinn  

i want to know the alternatives for the refrigerant R11 which is available in india now..

I will be helpful if i get the all the properties of the alternate refrigerant............and if i get the p-h diagram for thesame..

Question by karthikraja_09    |  last reply