Heat recovery - for what purpose it is used in a country house ?

heat recovery, what is it?

term "recovery" comes from the Latin word «recuperatio», which means the return, the reverse acquisition.In other words, the energy return, which was spent on one or another process, for its reuse.The HVAC equipment is - repeated application of heat contained in the air (in house) for heating the incoming fresh air.Heating occurs in a special heat exchanger.

And for fresh and exhaust air in the recuperator are not mixed, made their separation.If the premise, by contrast, have to be cooled, it is cold recovery.That is, from the exhaust air is given to the supplied cold.As can be seen from the above, in this process, a lot of pluses.The only disadvantage is the initial cost of installation.

recovery is performed best when installed in the home supply and exhaust ventilation.Such a system is most effective as to minimize heat losses, and also provides good breathability.

types of heat exchangers (heat exchangers)

In order to give a description of the species's understand first what constitutes a heat exchanger.In fact, it - soundproofed metal casing, which has a heat exchanger 2 and the fan (exhaust and supply).The exchange between the outgoing and the effluent is not through direct contact, but just the same through a heat exchanger.That he is the main element of this design and can be of different types.

• Rotary has high efficiency (about 75-90%), mainly used in large buildings, industrial plants.Transfers heat via the rotor between the exhaust and supply air duct.
• Plate, with an efficiency of about 50-80%, is used in small businesses, cafes and homes.It has views of a number of plates on both sides of which pass the supply and exhaust air.
• Chamber is a chamber, which is divided into 2 parts flap.First, in the same cell gets deleted and the air heats the wall.Then the flap is changing the direction of flow so that the supply air is already heated from the walls.Most often it is installed in homes, cottages, efficiencies of 70-80%.
• With intermediate coolant (aqueous-glycolic solution or water) that circulates between the 2 heat exchangers (one is located in the supply, other - in the exhaust duct).Mounts in any premises.Have low efficiency (45-60%).
• Heat pipes with an efficiency of about 50-70%.They have kind of closed system of tubes that are filled with freon.When heated exhaust air it evaporates, and when the supply air stream enters the freon re-condenses into a liquid.Are acceptable for use in industrial plants, is used in military and aerospace industries.

heat recovery system: the constituent elements

ventilation with heat recovery heat exchangers of the above uses two - rotor and plastic.It is important to remember that its main function is only to transfer heat from one stream to another.Plus, in this mechanism, there are fans and filters.Fans contribute to the inflow and exhaust air.

recuperators are mounted in the ventilation system of a country house in the air duct housing.The apartments are heat exchangers are not necessary, as the apartment is connected to a single ventilation system in all panel homes.

They can have one single or two engine.As a rule, it has several modes.For example, when you need ventilation in the house with lots of smoking guests, use the maximum mode.If the house is empty, or the hosts are asleep, then - minimum.The ventilation system also mounted and filters.It is necessary to clean the incoming air.In some recuperators air mixes.That is coming and is already polluted stream is mixed with the incoming.Such processes are taking place in the presence of a chamber or a rotary heat exchanger.Because the filters are mounted, and on the way leaving the recuperator flow.