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(no email)
Date: Mon Oct 25 2004 - 17:21:24 EDT
Hi Dennis,
We may be saying the same thing except different!
The heat actually comes out of the sea water (or raw water if you're in a
lake, river, etc.). The reversing valve changes the direction of refrigerant
flow but no heat comes from it. The heat comes from the refrigerant being
pressurized in what has now become the condenser. But that heat has to come
from somewhere and in this case it comes from the raw water that flows thru
the evaporator.
Just as the water coming from the thru hull will be warmer than ambient when
the system is cooling the boat, it will be cooler than ambient when the unit
is heating the boat.
"the sea water provides cooling for the hot gas return?????"
Yes when the system is cooling the boat. But it provides heat for the cool gas
return when heating.
The thing to remember is that an evaporator is a heat exchanger that absorbs
heat. The condenser is a heat exchanger that gives up heat. The way I remember
is that when your skin is wet it feels cooler because the water is
"evaporating" and absorbing heat away from your skin. If you put alcohol on
your skin it will feel even cooler because the alcohol evaporates faster than
water and picks up more heat.
Bill
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