This article presents the technical characteristics and peculiarities description of Bitzer 4NE-20.F4Y-40S compressor being a part of ground-to-air heat pump (operation principle and application features of this type have been described in previous articles of the series about the equipment given). Continue reading
The heating, ventilation and air-conditioning (HVAC) system of a cottage is shown in figure 4.2. The HVAC system main elements are central sectional air conditioner, Continue reading
To analyze this type of pump let us consider the example of heat pump with a system of heat take-off from the closed ground (i.e. a cooling medium is circulated in a closed loop, thus taking off the low-grade heat) and with a horizontal ground manifold.
The ground, as known, is the most universal source of dissipated (low-grade) heat, since Continue reading
This article presents the technical characteristics of main equipment, being a part of heat pump from a previous article of the series. It should be reminded that the unit main elements are Bitzer 6JE-33Y-40P semi-hermetic reciprocating compressor of Ecoline series, Bitzer K1353T shell-and-tube condenser, Danfoss EnFusion™ B3-052-90 plate-type evaporator. Continue reading
In units of the given type the low-grade heat energy is taken off from ponds. The heat take-off is actually performed by laying down a manifold being a system of plastic pipelines. Laying-down is carried out at Continue reading
The basic index of heat pump performance evaluation is a transformation coefficient COP (abbr. from English “coefficient of performance”). Terms “heat transformation coefficient” and “efficiency factor” are also met.
The COP is determined by the relation between heating capacity and consumed power: Continue reading
4. Air purgers .
The air penetrates into the refrigeration unit system on the low-pressure side when operating at boiling pressure lower than atmospheric one and during repair and maintenance works performance. The air builds up in a condenser and a steam part of linear receiver. The air entrained into the condenser leads to the following negative developments: