In a hot, humid summer the ERW can be used to passively cool down and desiccate the incurrent air into a building, and in winter then ERW can be used to warm up and humidify the incurrent air into the building (see figure 1 below).24 Apr 2017
What is meant by heat wheel?
Enthalpy wheels are starting to become a common device in Heating, Ventilating and Air Conditioning (HVAC) Systems. They transfer heat and humidity between the exhaust and supply air. Usually this means the supply air is warmed and humidified in the winter and cooled and dehumidified in the summer.
What is the purpose of a enthalpy wheel?
By recycling energy from the exhaust air, enthalpy wheels reduce the burden on air-conditioning systems to provide all the energy needed to get incoming outdoor air to the desired temperature. This saves valuable fuel resources and, in turn, lowers the energy costs faced by building owners and operators.23 Nov 2020
What is a heat recovery system in a house?
A heat recovery system helps the air circulate within a building by replacing it with colder air that is warmed by the ventilation system.
How does an ERU work?
The ERU's actual energy transfer rate is controlled by two things: the speed of the wheel which is usually controlled by a VFD and the percentage of air that takes a detour and gets bypassed around the wheel.
Are heat recovery systems worth it?
Of course, the main benefit of heat recovery is that there's less wasted heat, which means less money wasted on fuel costs. If you live in a newer home that's well-insulated and sealed up tight, then the extra fresh air you'll get from a heat recovery ventilator will be well worth the cost.28 Feb 2014
What is the purpose of a heat wheel?
An enthalpy wheel exchanges heat and humidity from one air-stream to another. Rather than discard used building air, an enthalpy wheel salvages useful energy and transfers it to incoming, fresh air. This saves energy by reducing the need for cooling in the summer and heating in the winter.28 Jul 2017
How do energy recovery wheels work?
An energy recovery wheel consists of a circular honeycomb matrix of heat-absorbing material, which is slowly rotated within the supply and exhaust air streams of an air-handling system. The enthalpy wheel allows both heat (sensible) energy and moisture (latent) energy to be exchanged.28 Jul 2017
What is the difference between enthalpy wheel and sensible wheel?
Most energy recovery devices transfer heat (sensible) energy only. An Enthalpy Wheel allows both heat (sensible) energy and moisture (latent) energy to be exchanged. The Enthalpy Wheel, coated with a desiccant material, is rotated between the incoming fresh air and the exhaust air.16 Jan 2012
Which of the following are advantages of using an enthalpy wheel?
Advantages. These wheels are quite compact and can achieve high heat transfer effectiveness, Heat wheels have a relatively low air pressure drop, typically 0.4 to 0.7 in.