Page 1 of 1

Air conditioning using Stirling Coolers

PostPosted: Fri Aug 14, 2009 8:13 pm
by nadam54321
Am a Interior Accessory design student....just got an idea and thought
of sharing with all others....

Cant we use Stirling coolers in air conditioning....by blowing a jet
stream of air at the cold head thereby getting cooling!!!!????

Response to Air conditioning using Stirling Coolers

PostPosted: Fri Aug 14, 2009 8:35 pm
by nadam54321
I live in India where there is pretty hot in summers....so am planning
to make an air conditioner that works with solar energy....

Here, i decided not to have energy conversions to reduce losses...so i
have thermal energy in my hand and want cooling effect...i know there
are absorption chillers which works by thermal energy rather than
mechanical but poor efficiency....so thought of an engine similar to
that of Stirling (dont mean exactly this)...it's main purpose is just
to convert thermal to mechanical energy which in turn is used to
compress the refrigerant(the one which is responsible for cooling
effect, need not be chlorine based ones).....

Basically its construction is similar to that of Duplex Stirling
Engine....It consists of two chambers separated by a piston...the
first chamber consists of working fluid (He) which gets expanded and
compressed because of solar-thermal energy concentrated using a
fresnel lens...that causes the piston to move and compress the
refrigerant in the other chamber...it is a kind of "compression in one
chamber leads to expansion in other chamber and vice-versa"....the
first chamber is to convert thermal to mechanical and the second is
for cooling (not to forget that both the chambers have two ends which
should be cooled and heated frequently to get the desired state)...

I thought of using He as the refrigerant in the second chamber....same
as Stirling cooler....at this end, we get really low temperatures (if
am not wrong)..so blow a jet stream of air on to the cold head to get
cooling air and send it through pipes to the space that has to be
cooled....

Am really interested in doing this.....Will this work....

Any help is greatly appreciated.....

Today is India's Independence day....but i think we get real
Independence when we get our Clean Energy....

Response to Air conditioning using Stirling Coolers

PostPosted: Sat Aug 15, 2009 5:42 am
by stan.hornbaker
Stirling coolers require mechanical energy input to produce low temperatures to liquify gasses for industrial and scientific purposes. They operate below ambient temperatures and are not suitable for use as conventional heat pumps.

Converting large amounts of low grade waste heat and/or solar energy into mechanical or electrical energy to run air conditioning units or supply the 'grid' is the goal of many efforts around the world.

Perhaps someone else will have suggestions for your proposal.