ASHP for Summer Cooling

thebackbar

Hello,

Some ASHPs have a module that will cool the building during the summer months. This is something i'm interested in as some of the newer houses i've visited during the summer are very warm. Has anyone used this feature in their ASHP ? Does it work ?

Thanks

Calahonda52

You really need to do the math on this, the unit will be sucking maybe 1 kWh constantly while cooling. If u are building a new house correct window orientation, solar shading, and correct insulation will address the overheating u refer to.
A well sized Mvhr unit with summer by pass, with the INTAKE from the noth facing side of house will do the job much more effectively, IMHO.

Condenser

Calahonda52 wrote: »

You really need to do the math on this, the unit will be sucking maybe 1 kWh constantly while cooling. If u are building a new house correct window orientation, solar shading, and correct insulation will address the overheating u refer to.
A well sized Mvhr unit with summer by pass, with the INTAKE from the noth facing side of house will do the job much more effectively, IMHO.

Much more than 1kw unless the house is tiny as a heat pump is less efficient in cooling mode than it is in heating mode. You also have to take precautions regarding condensation if using the ufh to provide the cooling.

murphaph

GSHP units can also be used for cooling. Usually the manufacturers offer two levely, passive and active. A picture speaks a thousand words so:

How it works

Outkast_IRE

To be honest in Ireland in domestic situations it is very rare for mechanical summer cooling to be necessary.

As pointed out previously if you limit the risk of overheating through intelligent design then you will not overheat and it will cost you nothing i highly recommend having a read of this its created by the Energy savings trust and it is all about reducing the risk of overheating.

http://www.rebelenergy.ie/ce129.pdf

Its easy to read, easy to understand and the concepts and ideas its presents are simple but very effective.

The only house i have ever encountered that required cooling had a wall of glass overlooking the sea, the wall of glass was South/West/West facing with no shading, and as many of you probably know, west facing windows in the summer evenings just allow the sun to penetrate right into the room & can quickly overheat a space.

thebackbar

thanks for the info folks