Heat Pump
Heat Pump
(OP)
Hello all,
I am designing a hotel. Owner has insisted to use Heat pumps throughout the building. Hotel has many conference rooms, banquet-halls, and large kitchens.
I don't have much ceiling space to use multiple small heat pumps. I never used large (20-ton) heat pumps. Have you applied heat pumps in these type of occupancies? What design problems should be considered?
I will appreciate your input
Sincerely,
Fayaz
I am designing a hotel. Owner has insisted to use Heat pumps throughout the building. Hotel has many conference rooms, banquet-halls, and large kitchens.
I don't have much ceiling space to use multiple small heat pumps. I never used large (20-ton) heat pumps. Have you applied heat pumps in these type of occupancies? What design problems should be considered?
I will appreciate your input
Sincerely,
Fayaz





RE: Heat Pump
RE: Heat Pump
RE: Heat Pump
Another option is to use VAV heatpumps with VAV boxes.
You can fit a five ton vertical heat pump in a fairly small closet. The door to the closet can serve as the access to the piping, and controls.
You are right about ramming heat pumps up into ceilings. They require maintenance such as filter changing, drain pan cleaning, compressor replacement, etc.. This is done sometimes but the maintenance people will curse you daily.
RE: Heat Pump
In any conference room, you are going to have high latent loads (moisture) from the people and the outside air (OA). How much latent from OA you will have will depend upon climete, but there will be some.
Two-row coils will not remove much moisture and room conditions will get humid in the meeting rooms, causing complaints. Heat pumps are a poor choice for conference rooms.
RE: Heat Pump
All of this completely ingnores the energy usage side of the equation. Units that are properly sized to handle a large portion of outside air that end up running on a single circuit with hot gas bypass 80% of the time is a very good way to run up an energy bill.
To truly address your first question. Sized properly they will work great. You will need to take an extra look at the heating side. You will really need to pay attention to the sizing of your electric heat (and make a determination is this emergency heat or supplemental, it makes a difference).
RE: Heat Pump
Heat pump manufacturers are offering a dehumidification mode as an option. Basically it slows down the supply fan so that the supply air temperature is low enough to dehumidify.
RE: Heat Pump
Probably the best solution is a dedicated OA unit with a deep enough coil so saturated suction temp stays up if you must use DX.