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Went out for an estimate on a Solar System last week. It is for a fish farm. Basically it is a huge metal type building with about 30 - 3500 gallon fish tanks. They raise fish there and sell them to a lot of restaurants in the Washington, DC area. They are only using 6 of tanks which are currently heated by individual electric spa / hot tub water heaters. The owner says it is costing him a fortune in electric bills, especially in the winter. The building is unconditioned and the fish tanks need to be kept between 71 to 75 degrees for the type fish he is raising.
There used to be a central boiler plant that heated all the tanks. But it has been ripped out. The previous owner apparently used to operate a lot more tanks. I am thinking of taking a couple of the un-used tanks and using them for storage tanks. I was going to submerse some copper coils into the tank(s) and then insulating and sealing the tanks off. So basically the solar would heat up that tank via a copper coil(s) and I would have another coil(s) to draw the heat from the storage tank to heat the actual fish tanks.
Also will be designing a boiler type system to supplement the solar. I am also going to give him some options to heat at least a portion of the building. So the fish tanks won't lose as much heat to the room.
I have a rep. coming out from Kingspan next week to take a look at the job. There is plenty of roof space for panels and it is not shaded at all. I have never designed a solar system for an application like this. Has anybody done a job like this before? Any advice or tips would be much appreciated. Thanks for any help in advance.