Question:
Hey, all! I have something of an idea for building a home power plant that supplies any home electric needs, plus air conditioning, heat, compressed air (if one has a use for it), and excess power to sell back to the local Utility. Basically, it would consist of a diesel engine (say, an old VW engine) picked up at the junkyard, complete with air conditioner compressor and it’s plumbing, a welder motor/generator, and a Trace SR2455 (or thereabouts). Oh, also, fueling the engine with waste cooking oil as in "Veggie-Van". The workups I’ve come up with suggest a total purchase price of just under $5,000, and a monthly return of a minimum of $200. Has anybody else come up with this sort of idea? Where are the holes in my reasoning? Thanks! Bro. Timothy
Response:
- Hide quoted text — Show quoted text – Hey, all! I have something of an idea for building a home power plant that supplies any home electric needs, plus air conditioning, heat, compressed air (if one has a use for it), and excess power to sell back to the local Utility. Basically, it would consist of a diesel engine (say, an old VW engine) picked up at the junkyard, complete with air conditioner compressor and it’s plumbing, a welder motor/generator, and a Trace SR2455 (or thereabouts). Oh, also, fueling the engine with waste cooking oil as in "Veggie-Van". The workups I’ve come up with suggest a total purchase price of just under $5,000, and a monthly return of a minimum of $200. Has anybody else come up with this sort of idea? Where are the holes in my reasoning?
… Well, the biggest hole is that you’ll have to build and maintain it yourself. Have you factored this into your costs? Have you really looked at how long these things will run before they break and need repairs? I know for a fact that most big stationary generators use some pretty heavy duty engines and car engines, especially the VW diesels, were well known to have short lifespans. You might examine dual-fueling the setup with two fuel tanks and an automatic transfer valve which would start it on bio-diesel or regular diesel and switch to straight vegetable oil after it’s running and then switch back again a few minutes before it shuts down. This could save you a lot of time, money and effort in refining that waste oil. Anthony
Response:
– Hide quoted text — Show quoted text – Hey, all! I have something of an idea for building a home power plant that supplies any home electric needs, plus air conditioning, heat, compressed air (if one has a use for it), and excess power to sell back to the local Utility. Basically, it would consist of a diesel engine (say, an old VW engine) picked up at the junkyard, complete with air conditioner compressor and it’s plumbing, a welder motor/generator, and a Trace SR2455 (or thereabouts). Oh, also, fueling the engine with waste cooking oil as in "Veggie-Van". The workups I’ve come up with suggest a total purchase price of just under $5,000, and a monthly return of a minimum of $200. Has anybody else come up with this sort of idea? Where are the holes in my reasoning? … Well, the biggest hole is that you’ll have to build and maintain it yourself. Have you factored this into your costs? Have you really looked at how long these things will run before they break and need repairs? I know for a fact that most big stationary generators use some pretty heavy duty engines and car engines, especially the VW diesels, were well known to have short lifespans.
Good point Anthony,,, especially when the "ol VW engine" comes out of a "junkyard." – Hide quoted text — Show quoted text – You might examine dual-fueling the setup with two fuel tanks and an automatic transfer valve which would start it on bio-diesel or regular diesel and switch to straight vegetable oil after it’s running and then switch back again a few minutes before it shuts down. This could save you a lot of time, money and effort in refining that waste oil. Anthony
Response:
– Hide quoted text — Show quoted text – Hey, all! I have something of an idea for building a home power plant that supplies any home electric needs, plus air conditioning, heat, compressed air (if one has a use for it), and excess power to sell back to the local Utility. Basically, it would consist of a diesel engine (say, an old VW engine) picked up at the junkyard, complete with air conditioner compressor and it’s plumbing, a welder motor/generator, and a Trace SR2455 (or thereabouts). Oh, also, fueling the engine with waste cooking oil as in "Veggie-Van". The workups I’ve come up with suggest a total purchase price of just under $5,000, and a monthly return of a minimum of $200. Has anybody else come up with this sort of idea? Where are the holes in my reasoning? Thanks! Bro. Timothy
Except for the biodiesel component, I read an article in Popular Science (I think) in the 70’s that did exactly this. The analysis then showed the cost of energy to be about equal to utility supplied power. The benefit was it could be off-grid. I’m pretty sure the unit used a VW engine as well.
Response:
Think about this: If a new engine might last 120,000 miles at 60 miles per hour that means the engine runs for 2000 hours well under the 8760 hours per year. Also running at 60 mph the engine probably was turning at 1500 rpm or about half speed and maybe 1/4 to 1/3 of full load. Seems like you need a long life engine to start with. – Hide quoted text — Show quoted text – Hey, all! I have something of an idea for building a home power plant that supplies any home electric needs, plus air conditioning, heat, compressed air (if one has a use for it), and excess power to sell back to the local Utility. Basically, it would consist of a diesel engine (say, an old VW engine) picked up at the junkyard, complete with air conditioner compressor and it’s plumbing, a welder motor/generator, and a Trace SR2455 (or thereabouts). Oh, also, fueling the engine with waste cooking oil as in "Veggie-Van". The workups I’ve come up with suggest a total purchase price of just under $5,000, and a monthly return of a minimum of $200. Has anybody else come up with this sort of idea? Where are the holes in my reasoning? Thanks! Bro. Timothy
Response:
- Hide quoted text — Show quoted text – Hey, all! I have something of an idea for building a home power plant that supplies any home electric needs, plus air conditioning, heat, compressed air (if one has a use for it), and excess power to sell back to the local Utility. Basically, it would consist of a diesel engine (say, an old VW engine) picked up at the junkyard, complete with air conditioner compressor and it’s plumbing, a welder motor/generator, and a Trace SR2455 (or thereabouts). Oh, also, fueling the engine with waste cooking oil as in "Veggie-Van". The workups I’ve come up with suggest a total purchase price of just under $5,000, and a monthly return of a minimum of $200. Has anybody else come up with this sort of idea? Where are the holes in my reasoning? Thanks! Bro. Timothy
A $200 a month payback sounds very optimistic. How did you come up with that? Co-generation schemes, maximizing efficiency by using the heat and hot water as well as the motive power of the engine, are not a new idea. The high cost of fuel and maintenance usually makes this impractical for small applications. Still it is worth some thought. Microturbines are taking over a lot of commercial applications of this sort. See: http://www.polarpowerinc.com/products/generators/cogenset.htm They are still a little expensive for home use. Rather than an auto diesel engine, why not a small water cooled diesel tractor motor? I think you could more closely match the engine to your load(s) and get much higher efficiency as well as longer engine life. Russian tractors, bought used and rebuilt for best cost/life tradeoff. Even a new Chinese motor might be cheaper than rebuilding your VW motor, although you might find a useable junkyard motor cheaper. I personally wouldn’t use a junkyard motor without going thru it, and overhauling it or rebuilding it. I don’t want to invest time and money installing an engine that won’t last. I don’t know how much cooling you can expect from an automobile engine driven compressor. Still, they cool 300 sq. ft. (2000 cu. ft.?) RVs on the road. Maybe you could find a larger one from a bus, RV, or marine application. I don’t imagine you can get over 15,000 BTU though, on a stationary application. Perhaps you can with water cooling, running at high speed (3000-5000RPM?). And how many of these They don’t run all of that time, so maybe 1000 hrs. is a reasonable lifetime to expect from one of these. I’ve given a lot of thought to doing something like this for a completely off grid house. I think I’ll go with geothermal HVAC for the most practical method of cooling. That won’t keep me from trying this on a small scale, tho. I’m accumulating parts and application knowledge, and I’d like to encourage anybody who wants to experiment along these lines. I just don’t think it’s a money making proposition even with free fuel. Russ
Response:
Think about this: If a new engine might last 120,000 miles at 60 miles per hour that means the engine runs for 2000 hours well under the 8760 hours per year. Also running at 60 mph the engine probably was turning at 1500 rpm or about half speed and maybe 1/4 to 1/3 of full load. Seems like you need a long life engine to start with.
You’re on the right track re engine longevity. Based on my experience, perhaps I can suggest a revision in your numbers. Your 120,000 miles is corret for 1950+ to 1975, maybe 1985 or so engines. But, with no overdrive, they would have been running at 2400RPM plus. With overdrive, and 1990+ engines, many (1/2?) of them can last 300,000 miles. I would expect 3000 – 6000 hrs in use as automobile engines. Engines are better made, now. Blueprinted engines, (specs held to minimum tolerences) almost always (in the 60’s) lasted twice as long as factory engines. Now they make every engine to tighter tolerences – who knows how long they can last? I would expect 200,000 – 300,000 miles from most of the engines made today. Please do note that it is possible (blueprint) to rebuild old engines to current tolerences (or better) and drastically extend their life. Also, with a stationary application, one can optimise the working conditions to suit the application. Perhaps you could triple the life (or better). That puts you in the 15,000 hr. catagory. Running on propane or natural gas can get you to 25,000hrs. Buy a turbine engine if you want to exceed that – 100,000 hrs – 1,000,000hrs , compared to say 2500Hrs- 25,000hrs. for a (automobile, gas) piston engine. Heavy duty diesels are optimized for marine or other use, and can go much higher in hours than a gasoline powered engine. They don’t compete with turbines, except for initial cost. The important point to realize here is that we are all experimenters. Most of us want to play, like kids with Tonka trucks or Tinkertoys (and play cheap, so we can do it more). There are many applications where this type of thing may well be the low cost (even if you consider it long term) alternative. Really. Especially if you can aquire most of the material free, or close to it. So, if it costs more than it produces (it certainly will if you count time spent) it’s still FUN. And one can apply the knowledge and experience gained to benefit. I don’t want to discourage anybody from trying things like this. But, I would like to save you from expecting too much out of it, and maybe re-direct you from wrong alleys. If your name is Tesla, please ignore anything I have said. Russ – Hide quoted text — Show quoted text – Hey, all! I have something of an idea for building a home power plant that supplies any home electric needs, plus air conditioning, heat, compressed air (if one has a use for it), and excess power to sell back to the local Utility. Basically, it would consist of a diesel engine (say, an old VW engine) picked up at the junkyard, complete with air conditioner compressor and it’s plumbing, a welder motor/generator, and a Trace SR2455 (or thereabouts). Oh, also, fueling the engine with waste cooking oil as in "Veggie-Van". The workups I’ve come up with suggest a total purchase price of just under $5,000, and a monthly return of a minimum of $200. Has anybody else come up with this sort of idea? Where are the holes in my reasoning? Thanks! Bro. Timothy
Response:
– Hide quoted text — Show quoted text – *Hey, all! * * I have something of an idea for building a home power plant that *supplies any home electric needs, plus air conditioning, heat, compressed *air (if one has a use for it), and excess power to sell back to the local *Utility. * * Basically, it would consist of a diesel engine (say, an old VW engine) *picked up at the junkyard, complete with air conditioner compressor and it’s *plumbing, a welder motor/generator, and a Trace SR2455 (or thereabouts). * * Oh, also, fueling the engine with waste cooking oil as in "Veggie-Van". * * The workups I’ve come up with suggest a total purchase price of just *under $5,000, and a monthly return of a minimum of $200. * * Has anybody else come up with this sort of idea? Where are the holes in *my reasoning? * * *Thanks! * *Bro. Timothy * Hey, sounds good to me. .. and you might find a low mileage engine that would last for a good while… and if the setup was good and easy to hook up, you could just put another junkyard diesel in after the old one craps out. With an external oil cooler with increased capacity and a large radiator, you might just get alot more hours out of it. And hour meter would get maintence down to a minimum and a larger pan and good truck type oil filter / air cleaner might help also. the noise would be a problem to an extent but you could also put a clutch and power take off on it to power a water pump. The vegetable oil needs to be heated all the way to the motor and dual fuels will be required. The fuel tank could be on wheels with built in filtering system so you could just pull up and fill it. Cheap way to play,, good luck.. Don
See the following URL for a VW Diesel-powered GenSet. . http://www.oldengine.org/members/jdunmyer/genset/ Dave Foreman
Response:
Have had a similar thought as well, does anyone know the fuel consumption (litres/hr) of a VW at various loads? – Hide quoted text — Show quoted text – Hey, all! I have something of an idea for building a home power plant that supplies any home electric needs, plus air conditioning, heat, compressed air (if one has a use for it), and excess power to sell back to the local Utility. Basically, it would consist of a diesel engine (say, an old VW engine) picked up at the junkyard, complete with air conditioner compressor and it’s plumbing, a welder motor/generator, and a Trace SR2455 (or thereabouts). Oh, also, fueling the engine with waste cooking oil as in "Veggie-Van". The workups I’ve come up with suggest a total purchase price of just under $5,000, and a monthly return of a minimum of $200. Has anybody else come up with this sort of idea? Where are the holes in my reasoning? Thanks! Bro. Timothy A $200 a month payback sounds very optimistic. How did you come up with that? Co-generation schemes, maximizing efficiency by using the heat and hot water as well as the motive power of the engine, are not a new idea. The high cost of fuel and maintenance usually makes this impractical for small applications. Still it is worth some thought. Microturbines are taking over a lot of commercial applications of this sort. See: http://www.polarpowerinc.com/products/generators/cogenset.htm They are still a little expensive for home use. Rather than an auto diesel engine, why not a small water cooled diesel tractor motor? I think you could more closely match the engine to your load(s) and get much higher efficiency as well as longer engine life. Russian tractors, bought used and rebuilt for best cost/life tradeoff. Even a new Chinese motor might be cheaper than rebuilding your VW motor, although you might find a useable junkyard motor cheaper. I personally wouldn’t use a junkyard motor without going thru it, and overhauling it or rebuilding it. I don’t want to invest time and money installing an engine that won’t last. I don’t know how much cooling you can expect from an automobile engine driven compressor. Still, they cool 300 sq. ft. (2000 cu. ft.?) RVs on the road. Maybe you could find a larger one from a bus, RV, or marine application. I don’t imagine you can get over 15,000 BTU though, on a stationary application. Perhaps you can with water cooling, running at high speed (3000-5000RPM?). And how many of these They don’t run all of that time, so maybe 1000 hrs. is a reasonable lifetime to expect from one of these. I’ve given a lot of thought to doing something like this for a completely off grid house. I think I’ll go with geothermal HVAC for the most practical method of cooling. That won’t keep me from trying this on a small scale, tho. I’m accumulating parts and application knowledge, and I’d like to encourage anybody who wants to experiment along these lines. I just don’t think it’s a money making proposition even with free fuel. Russ
Response:
Have had a similar thought as well, does anyone know the fuel consumption (litres/hr) of a VW at various loads?
Rule of thumb for gas engines is 0.5 lbs. per HP per hour. I would think diesel would be a little less, say 0.4lbs./HP/Hr. The generator manufacturers usually publish fuel consumption data. You can probably find a generator similar to what you want to use and estimate from that. As long as you compare engines of about the same size, there shouldn’t be too much difference. Russ – Hide quoted text — Show quoted text – Hey, all! I have something of an idea for building a home power plant that supplies any home electric needs, plus air conditioning, heat, compressed air (if one has a use for it), and excess power to sell back to the local Utility. Basically, it would consist of a diesel engine (say, an old VW engine) picked up at the junkyard, complete with air conditioner compressor and it’s plumbing, a welder motor/generator, and a Trace SR2455 (or thereabouts). Oh, also, fueling the engine with waste cooking oil as in "Veggie-Van". The workups I’ve come up with suggest a total purchase price of just under $5,000, and a monthly return of a minimum of $200. Has anybody else come up with this sort of idea? Where are the holes in my reasoning? Thanks! Bro. Timothy A $200 a month payback sounds very optimistic. How did you come up with that? Co-generation schemes, maximizing efficiency by using the heat and hot water as well as the motive power of the engine, are not a new idea. The high cost of fuel and maintenance usually makes this impractical for small applications. Still it is worth some thought. Microturbines are taking over a lot of commercial applications of this sort. See: http://www.polarpowerinc.com/products/generators/cogenset.htm They are still a little expensive for home use. Rather than an auto diesel engine, why not a small water cooled diesel tractor motor? I think you could more closely match the engine to your load(s) and get much higher efficiency as well as longer engine life. Russian tractors, bought used and rebuilt for best cost/life tradeoff. Even a new Chinese motor might be cheaper than rebuilding your VW motor, although you might find a useable junkyard motor cheaper. I personally wouldn’t use a junkyard motor without going thru it, and overhauling it or rebuilding it. I don’t want to invest time and money installing an engine that won’t last. I don’t know how much cooling you can expect from an automobile engine driven compressor. Still, they cool 300 sq. ft. (2000 cu. ft.?) RVs on the road. Maybe you could find a larger one from a bus, RV, or marine application. I don’t imagine you can get over 15,000 BTU though, on a stationary application. Perhaps you can with water cooling, running at high speed (3000-5000RPM?). And how many of these They don’t run all of that time, so maybe 1000 hrs. is a reasonable lifetime to expect from one of these. I’ve given a lot of thought to doing something like this for a completely off grid house. I think I’ll go with geothermal HVAC for the most practical method of cooling. That won’t keep me from trying this on a small scale, tho. I’m accumulating parts and application knowledge, and I’d like to encourage anybody who wants to experiment along these lines. I just don’t think it’s a money making proposition even with free fuel. Russ
Response:
4.52 liters/hr at 100 km/h — Steve Spence Subscribe to the Renewable Energy Newsletter: http://www.webconx.com/subscribe.htm Renewable Energy Pages – http://www.webconx.com Palm Pilot Pages – http://www.webconx.com/palm X10 Home Automation – http://www.webconx.com/x10 (212) 894-3704 x3154 – voicemail/fax We do not inherit the earth from our ancestors, we borrow it from our children. —
Have had a similar thought as well, does anyone know the fuel
consumption (litres/hr) of a VW at various loads? Rule of thumb for gas engines is 0.5 lbs. per HP per hour. I would think diesel would be a little less, say 0.4lbs./HP/Hr. The generator manufacturers usually publish fuel consumption data. You can probably find a generator similar to what you want to use and estimate from that. As long as you compare engines of about the same size, there shouldn’t be too much difference. Russ
– Hide quoted text — Show quoted text – Hey, all! I have something of an idea for building a home power plant that supplies any home electric needs, plus air conditioning, heat, compressed air (if one has a use for it), and excess power to sell back to the local Utility. Basically, it would consist of a diesel engine (say, an old VW engine) picked up at the junkyard, complete with air conditioner compressor and it’s plumbing, a welder motor/generator, and a Trace SR2455 (or thereabouts). Oh, also, fueling the engine with waste cooking oil as in "Veggie-Van". The workups I’ve come up with suggest a total purchase price of just under $5,000, and a monthly return of a minimum of $200. Has anybody else come up with this sort of idea? Where are the holes in my reasoning? Thanks! Bro. Timothy A $200 a month payback sounds very optimistic. How did you come up with that? Co-generation schemes, maximizing efficiency by using the heat and hot water as well as the motive power of the engine, are not a new idea. The high cost of fuel and maintenance usually makes this impractical for small applications. Still it is worth some thought. Microturbines are taking over a lot of commercial applications of this sort. See: http://www.polarpowerinc.com/products/generators/cogenset.htm They are still a little expensive for home use. Rather than an auto diesel engine, why not a small water cooled diesel tractor motor? I think you could more closely match the engine to your load(s) and get much higher efficiency as well as longer engine life. Russian tractors, bought used and rebuilt for best cost/life tradeoff. Even a new Chinese motor might be cheaper than rebuilding your VW motor, although you might find a useable junkyard motor cheaper. I personally wouldn’t use a junkyard motor without going thru it, and overhauling it or rebuilding it. I don’t want to invest time and money installing an engine that won’t last. I don’t know how much cooling you can expect from an automobile engine driven compressor. Still, they cool 300 sq. ft. (2000 cu. ft.?) RVs on the road. Maybe you could find a larger one from a bus, RV, or marine application. I don’t imagine you can get over 15,000 BTU though, on a stationary application. Perhaps you can with water cooling, running at high speed (3000-5000RPM?). And how many of these They don’t run all of that time, so maybe 1000 hrs. is a reasonable lifetime to expect from one of these. I’ve given a lot of thought to doing something like this for a completely off grid house. I think I’ll go with geothermal HVAC for the most practical method of cooling. That won’t keep me from trying this on a small scale, tho. I’m accumulating parts and application knowledge, and I’d like to encourage anybody who wants to experiment along these lines. I just don’t think it’s a money making proposition even with free fuel. Russ
Response:
Forget storage, forget filtering and drip, grease trap is a good idea, but I don’t garden. (deep mulch) but – we don’t currently use a washer. (We haul all water) – Hide quoted text — Show quoted text – Hey, all! I have something of an idea for building a home power plant that supplies any home electric needs, plus air conditioning, heat, compressed air (if one has a use for it), and excess power to sell back to the local Utility. Basically, it would consist of a diesel engine (say, an old VW engine) picked up at the junkyard, complete with air conditioner compressor and it’s plumbing, a welder motor/generator, and a Trace SR2455 (or thereabouts). Oh, also, fueling the engine with waste cooking oil as in "Veggie-Van". The workups I’ve come up with suggest a total purchase price of just under $5,000, and a monthly return of a minimum of $200. Has anybody else come up with this sort of idea? Where are the holes in my reasoning? … Well, the biggest hole is that you’ll have to build and maintain it yourself. Have you factored this into your costs? Have you really looked at how long these things will run before they break and need repairs? I know for a fact that most big stationary generators use some pretty heavy duty engines and car engines, especially the VW diesels, were well known to have short lifespans. You might examine dual-fueling the setup with two fuel tanks and an automatic transfer valve which would start it on bio-diesel or regular diesel and switch to straight vegetable oil after it’s running and then switch back again a few minutes before it shuts down. This could save you a lot of time, money and effort in refining that waste oil. Anthony
Response:
The holes in the plan wouldn’t become visable until the vw quit running. What’s wrong with a 24volt wind generator with a grid intertie–hooks right in, and you’ld be selling power to the local pathetic power company when ever you weren’t using it all. – Hide quoted text — Show quoted text – Think about this: If a new engine might last 120,000 miles at 60 miles per hour that means the engine runs for 2000 hours well under the 8760 hours per year. Also running at 60 mph the engine probably was turning at 1500 rpm or about half speed and maybe 1/4 to 1/3 of full load. Seems like you need a long life engine to start with. Hey, all! I have something of an idea for building a home power plant that supplies any home electric needs, plus air conditioning, heat, compressed air (if one has a use for it), and excess power to sell back to the local Utility. Basically, it would consist of a diesel engine (say, an old VW engine) picked up at the junkyard, complete with air conditioner compressor and it’s plumbing, a welder motor/generator, and a Trace SR2455 (or thereabouts). Oh, also, fueling the engine with waste cooking oil as in "Veggie-Van". The workups I’ve come up with suggest a total purchase price of just under $5,000, and a monthly return of a minimum of $200. Has anybody else come up with this sort of idea? Where are the holes in my reasoning? Thanks! Bro. Timothy
Response:
2 vw diesel’s (about $300 each at local junkyard) one offline, on online. switch over for maintenance. — Steve Spence Subscribe to the Renewable Energy Newsletter: http://www.webconx.com/subscribe.htm Renewable Energy Pages – http://www.webconx.com Palm Pilot Pages – http://www.webconx.com/palm X10 Home Automation – http://www.webconx.com/x10 (212) 894-3704 x3154 – voicemail/fax We do not inherit the earth from our ancestors, we borrow it from our children. — – Hide quoted text — Show quoted text – The holes in the plan wouldn’t become visable until the vw quit running. What’s wrong with a 24volt wind generator with a grid intertie–hooks right in, and you’ld be selling power to the local pathetic power company when ever you weren’t using it all. Think about this: If a new engine might last 120,000 miles at 60 miles per hour that means the engine runs for 2000 hours well under the 8760 hours per year. Also running at 60 mph the engine probably was turning at 1500 rpm or about half speed and maybe 1/4 to 1/3 of full load. Seems like you need a long life engine to start with. Hey, all! I have something of an idea for building a home power plant that supplies any home electric needs, plus air conditioning, heat, compressed air (if one has a use for it), and excess power to sell back to the local Utility. Basically, it would consist of a diesel engine (say, an old VW engine) picked up at the junkyard, complete with air conditioner compressor and it’s plumbing, a welder motor/generator, and a Trace SR2455 (or thereabouts). Oh, also, fueling the engine with waste cooking oil as in "Veggie-Van". The workups I’ve come up with suggest a total purchase price of just under $5,000, and a monthly return of a minimum of $200. Has anybody else come up with this sort of idea? Where are the holes in my reasoning? Thanks! Bro. Timothy
Response: