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N9WOS
This is something that caught my attention. For people looking for a viable
solar/dc based air conditioning system for their home. Tecumseh is making a
masterflux branded line of compressors called sierra, for 12/24/48 and
higher volt operation.
http://www.masterflux.com/products/sierra/
They also have complete condensing units built around them.
http://www.masterflux.com/products/condensingunits/
High temp is basically the same operating range as AC service. Basically an
evaporator temp above freezing.
They have a rated capacity range from 3000 to 6000BTU with a condensing temp
of 130F. In the real world, with an adequate condenser, condensing temps
will not be close to 130F. So that is the worst case scenario. Actual real
world capacities will be closer to 5000 to 10000 BTU with more normal 100F
condensing temps.
The only reason you see higher condensing temps on their complete condenser
line is because they are not really optimized for AC service. The condenser
coil isn't really large enough to support the higher evap temps and higher
capacity.
At a power draw of 374 watts for 3753BTU at 55F evap, and 130F condensing,
you still push over 10EER which pretty respectable for 130F condensing temp.
If you got a reasonable sized 1 to 1.5 ton condensing unit and put that
compressor in it, you would not see over 10F above ambient condensing temps.
That will help capacity and EER for AC service greatly. You would have to
change the condenser fan over to a 12 DC type. Inside evaporator could be
anything from a small fan coil, or a wall mount unit.
Basically the above system with two 200W panels and an AC with a couple of
golf cart batteries for a buffer and you will have climate control during
the day time. With big enough GC batts and you could carry cooling into the
night hours.
A lot more efficient than running a window shaker on your existing
inverter/solar installation.
Granted, 3 to 5kBtu isn't a lot. But in a well insulated house, or part of a
house, it will make things a lot more comfortable.
Yes, you would be talking about approximately $4000 for a 5000BTU ac, but
considering How much a normal central air system cost. Even a mini split of
that size will cost over $1000. And it doesn't use AC power, so no electric
bill. 4K bucks for a solar ac doesn't sound that bad.
solar/dc based air conditioning system for their home. Tecumseh is making a
masterflux branded line of compressors called sierra, for 12/24/48 and
higher volt operation.
http://www.masterflux.com/products/sierra/
They also have complete condensing units built around them.
http://www.masterflux.com/products/condensingunits/
High temp is basically the same operating range as AC service. Basically an
evaporator temp above freezing.
They have a rated capacity range from 3000 to 6000BTU with a condensing temp
of 130F. In the real world, with an adequate condenser, condensing temps
will not be close to 130F. So that is the worst case scenario. Actual real
world capacities will be closer to 5000 to 10000 BTU with more normal 100F
condensing temps.
The only reason you see higher condensing temps on their complete condenser
line is because they are not really optimized for AC service. The condenser
coil isn't really large enough to support the higher evap temps and higher
capacity.
At a power draw of 374 watts for 3753BTU at 55F evap, and 130F condensing,
you still push over 10EER which pretty respectable for 130F condensing temp.
If you got a reasonable sized 1 to 1.5 ton condensing unit and put that
compressor in it, you would not see over 10F above ambient condensing temps.
That will help capacity and EER for AC service greatly. You would have to
change the condenser fan over to a 12 DC type. Inside evaporator could be
anything from a small fan coil, or a wall mount unit.
Basically the above system with two 200W panels and an AC with a couple of
golf cart batteries for a buffer and you will have climate control during
the day time. With big enough GC batts and you could carry cooling into the
night hours.
A lot more efficient than running a window shaker on your existing
inverter/solar installation.
Granted, 3 to 5kBtu isn't a lot. But in a well insulated house, or part of a
house, it will make things a lot more comfortable.
Yes, you would be talking about approximately $4000 for a 5000BTU ac, but
considering How much a normal central air system cost. Even a mini split of
that size will cost over $1000. And it doesn't use AC power, so no electric
bill. 4K bucks for a solar ac doesn't sound that bad.