compressor horse power

[The_AV8R]

So would compressor power consumption simply be desired heating output / (compressor efficiency+cycle efficiency)?

Say I want a 1.75 kW heating output, and my compressor is rated at 80% efficiency, am I looking for a compressor that produces about 2.19 kW (3 hp)?

[lana]

Hi everybody,

It has been a very long time .... I have been very very busy.

Horse power is a unit for electric power. Most people confuse this with cooling or heating power. International unit system use Watt for every form of power, including heating, cooling and electricity.
The confusion comes from this : you can not convert cooling Watt into HP. Because the first one is heat power and the second is electrical.
Now consider this : there is a compressor which has cooling capacity of 10000Watts at (-20°C/50°C) and its power consumption is 6000Watts at the same conditions. You only can convert the 6000watts into HP.
On the other hand refrigeration compressors consumes different electrical power at different operating conditions therefore, there are different Horse powers at each condition. When a compressor is called 10HP, this is a nominal HP and it dose not tell us very much.
1 HP = 736 Watt ..... ELECTRICAL power only

Cheers

[D.D.KORANNE]

Probably compressor manufacturer will select the highest evap temp & highest condensing temp to arrive at the power consummption & select a nminal rated motor which by & large will suit all the applications under the envelope

[marc5180]

Welcome back Lana, it's good to see you posting on the forums again.