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Old 12-12-2009, 11:59 PM   #1
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Giving a heat pump a jump start.


Greetings, Since heat pump effencientcy drops when temps. get below freezing if the air around the unit was warmed, would this help to improve inside temps quicker. Some way of surrownding unit with mirrors to reflecy the sunlight a warm the unit? just another wandering mind.......

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Old 12-13-2009, 06:17 AM   #2
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Giving a heat pump a jump start.


Won't get much if any real benefit from doing that.

You can prove this to yourself. By going outside when its say 30. Place a mirror 3' a way from you and positioned so it reflects sun light on you. See how much warmer you feel.

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Old 12-13-2009, 07:25 AM   #3
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Giving a heat pump a jump start.


that is an interesting question. i wonder if you were to place a magnifiying mirror near it in an enclosed space such as a green house? heat pumps are pretty amazing devices.if you try this let us know the outcome. it may be a new evolution of energy.
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Old 12-13-2009, 07:59 AM   #4
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Giving a heat pump a jump start.


A magnifying mirror doesn't concentrate light. It spreads it.

Green house would need to be fairly large. Even a 2 ton heat pump moves about 2,000 CFM through the outdoor coil. So in 20 minutes of run time. It would move and cool 40,000 cubic foot of air(the outdoor unit needs to move a lot more air then the indoor unit).

If the mirror did direct more IR heat to the heat pump's coils. Much of that heat would be lost to the air that the fan was moving.

Plus you would have to limit the amount of temp drop in the green house if you were growing plants in the spring fall or winter.

Next. In winter green houses need to be heated at night, or when the sun goes down, or clouds block the sun light.

You could end up spending more money heating the green house, then you would ever save.

Plus. How would you get rid of all of the heat in the summer when it was in the cooling mode.

It a great idea. But, too many flaws, to be practical, unless you have a large green house, that wasn't used for plants in the winter. And you also installed a remote condenser with controls and soleniods for switch over coil so the heat pump can cool in the summer.
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