Micro CoGen.

i was looking at the sd7h15 154.7 cc

and thought that whatever compressor i used would probably need to be run at peek efficiency,


i think what your post meant is the compressor will work fine at the lower rpms requiring less hp?

Thanks Bob

im sure this is not complicated to most here. but im lost

1hp=746watts=.746kw

what i had done earlier was look up a 8-9k btu auto a/c, the size the compressor they used on sandens site, it require's about 4kw to run at peak efficiency. that is the compressor alone! on top of that it would also require both condensor and evaporator fans.

the reason i am asking is because i hope to build a auxillary power unit for my peterbilt. after reading about less than 1hp a/c im thinking maybe a better option would be to use there 12v a/c unit then mount a large alternator on the extra engine. plus replace the three group 31 batteries already on the truck with trojan deep cycle?

my plans are leaning towards finding a lightweight diesel around 10hp (perkins,kubota,yanmar) that will just drive a a/c compressor and a alternator. the a/c system would be seperate from the trucks a/c.,,,but then i noticed pony pack ties into the trucks existing a/c with its own compressor. this would be a nice option because it would save installing all the extra's. how it works or is tied in i dont know?

i have a webasto so heat will not be needed. i originaly liked the idea of using agm batteries when the truck is shut down but after reading the risk of ruining a set of batteries due to improper discharge recharge i at least know i want some type of engine driven system.

hope i havnt confused you all as much as i am, the more i search the more options and confused i get. plans are open for any suggestions ideas etc. and or a link to someone who has built a similar unit would be nice.

Thanks

sorry if i am bringing up something that dont belong on the forumn, i am new to generation and cogeneration

but this is something that confuses me

http://www.sanden.com/index.php?id=U5H0AMX7Q

if you click on the power curve most of the compressors alone require over 4kw to turn. how is it that a complete 12/24/48 dc electric unit can run on less than 1hp?

sanden also lists this dc drive compressor but dont show specs  http://www.sanden.com/index.php?id=TSPM4GG46

i dont know much about it other than new class8 trucks here in the usa have the DEF diesel exhaust fluid, google SCR systems

i heard it was tried in europe resulting in more bad effects than good

9000 BTU on less than 1hp

seems to be super efficient compared to a belt driven sanden compressor that requires about 4.4kw?

http://www.dcairco.com/products.html

Thanks Bob

for putting this to a test, looking forward to more opinions and results

http://www.truckinginfo.com/clean-green/news-detail.asp?news_id=69628&news_category_id=62

i hope this works as claimed?

there have been similar claims when feeding natural gas or propane into the intake on a diesel but the only efficiency gain seems to be if you dont include the cost of the NG or LP