HRV - HEAT EXCHANGE VENTILATOR
FIT HEAT EXCHANGERS TO SAVE ENERGY AND REDUCE YOUR THE CARBON FOOTPRINT OF YOUR POULTRY FARM
The science is proven – use the internal heat in the shed to raise the temperature of the incoming ventilation air. The HRV achieves this in a straightforward way delivering a modular and cost effective solution to venting poultry houses whilst saving energy and reducing your carbon footprint.
HRV HEAT EXCHANGER
The HRV is designed to deliver minimum ventilation with heat exchange in broiler houses for approx 10 to 15 days. This is when the heat requirement is at its greatest so the benefits of venting through the HRV are clear.
Typical temperature lift of 17+ degrees in winter & colder months.
Install as many units as required to achieve minimum ventilation.
All stale air is exhausted. The HRV works without air mixing.
PRINCIPLE OF OPERATION
The HRV draws hot stale air from inside the shed and exhausts it, through a plate heat exchanger, to the outside. At the same time, fresh outside air is drawn through the same plate heat exchanger where it picks up the heat from the outgoing air.
The result is that the temperature of the incoming ventilation air is lifted by a significant factor. Independent test have shown this temperature lift can be as much as 17 degrees C.
As it cools, moisture condenses out of the stale air and drains from the HRV casing (this water may or may not need to be collected). By raising the temperature of this air without introducing moisture, it enters the shed at a lower relative humidity that the inside air. As such, moisture from the inside air is absorbed by the ‘new’ fresh air and the humidity inside the shed drops.
In a broiler house, tests show the HRV’s efficiency can be as high as 85%. This means that outside fresh air is being brought into the shed at approx 85% of the internal temperature rather than the colder ambient outdoor temperature.
The best way to control the HRVs is to have them vent according to the birds weight curve. This delivers as much fresh air as the birds need, avoids over venting and delivers maximum efficiency. We can supply controllers to achieve this or they can be wired into your house computer.
Lowering the house relative humidity is a consequence of introducing warm dry air into the shed. Moisture is removed from the air as it is exhausted from the HRV.