In article , mm wrote:
On Fri, 26 Jan 2007 02:30:49 GMT, AZ Nomad
wrote:

On Thu, 25 Jan 2007 21:02:54 -0500, mm wrote:
Let me think about this. hmmmm Actually, if the door is open and
the water evaporates, it will actually cool the room, specifically the
surface that the water was sitting on and the air nearby. Whenever
water evaporates, it cools. And it raises the humidity.

That is asuming that you're working with cold to room-temperature
water. Flip a shower all the way to hot and open the shower door and I
can assure you that the bathroom will not be cooling down.

The first sentence in the previous post dealt with the heat of the
water warming the room. Of course the hot water will warm the room,
but it will do that whether the dishwasher door is shut or open. Just
more slowly if it is shut, but the AC doesn't care if the heat is
added slowly or quickly. It has to work just as hard to remove the
heat.

By the end of the rinse cycle, the vast majority of the
hot water has been flushed down the waste line. The remaining
heat is stored mainly in the dishwasher lining and the
dishes. That really isn't very much heat in the grand scheme
of things. And whether the door is open or closed, most of
that heat will disperse into the kitchen as you say. However,
the impact on the HVAC isn't going to be terribly significant;
there simply isn't very much energy involved.

Heat recovery from the waste water might become an interesting
proposition at some point in the future.

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