Heat recovery ventilation
Channel: all the knowledge of the universe PRINCIPIA
Date: 2022-01-11

Heat recovery ventilation, by Wikipedia https://en.wikipedia.org/wiki?curid=1007484 / CC BY SA 3.0

#Heating
#Ventilation
#Residential_heating
#Sustainable_building
#Low-energy_building
#Energy_conservation
#Energy_recovery
Ventilation unit with heat pump & ground heat exchanger - cooling Heat recovery ventilation （HRV）, also known as mechanical ventilation heat recovery （MVHR）,
is an energy recovery ventilation system which works between two sources at different temperatures.
Heat recovery is a method which is increasingly used to reduce the heating and cooling demands （and thus energy costs） of buildings.
By recovering the residual heat in the exhaust gas, the fresh air introduced into the air conditioning system is pre-heated （pre-cooled）, and the fresh air
enthalpy is increased （reduced） before the fresh air enters the room or the air cooler of the air conditioning unit performs heat and moisture treatment.
A typical heat recovery system in buildings consists of a core unit, channels for fresh air and exhaust air, and blower fans.
Building exhaust air is used as either a heat source or heat sink depending on the climate conditions, time of year and requirements of the building.
Heat recovery systems typically recover about 60–95% of the heat in exhaust air and have significantly improved the energy efficiency of buildings .
Ventilation unit with heat pump & ground heat exchanger A heat recovery system is designed to supply conditioned air to the occupied space to maintain a certain temperature.
A heat recovery system keeps a house fully ventilated while recovering heat being emitted from the inside environment.
The purpose of heat recovery systems is to transfer the thermal energy （enthalpy） from one fluid to another fluid, from one fluid to a solid or from a solid surface to a fluid, at different temperatures and in thermal contact.
There is no direct interaction between fluid and fluid or fluid and solid in most heat recovery systems.
In some heat recovery sys...