1. Engineering Design of Air to Water Heat Pump
Arrangement of the air-cooled heat pump units
The air to water heat pump units are present in use different degrees of such a phenomenon,
the summer, the refrigerant amount is insufficient, winter heating capacity is shortage. The
reason for this phenomenon is caused by a wide range of engineering design problems,
where in addition to the factor of the device itself. Air short-circuit arrangement of equipment
caused by the irrational, summer high temperature exhaust of the unit is re-inhaled, causing
the inlet air temperature is too high condensing pressure rises, leading to decline in cooling
capacity; winter defrost unit discharge of moist air next heating unit caused by inhalation of
respirable air humidity is too high, exacerbated by the speed of heating units frosting, making
it defrost time, the heating time is reduced, so that the air to water heat pump unit reduces
calorie.
Installation of Split Heat Pump
The split heat pump should wherever possible be located in the outdoor, and the air intake
should be smooth, the exhaust should not be blocked. Avoid causing air short-circuit. Barrier,
if any, should meet certain requirements. Design manual by many producers and other units
of the spacing between the crew and the crew with the distance between the walls are clear
requirements is as follows: the distance between units should be maintained at more than
two meters, the distance between the unit and the main building should be kept In more than
three meters. In addition, in order to avoid the exhaust short-circuit the upper part of the unit
should not be set to block canopy obstructions like. If the machine split heat pump must be
arranged in the room, should be taken to improve fan static pressure Jiefeng pipe exhaust
row to outdoor. Winds of the exhaust port (7 m / sec), it has a certain range, and the speed of
the air inlet will have a small (2 meters / sec), the vertical elevation of the inlet and outlet
should be as large as possible, in order to avoid air short circuit.
Configuration of Auxiliary Heat Source Unit
The heat supply of the air to water heat pump will be changed with the decline of the outdoor
temperature in winter. When the outdoor temperature is decreasing by 1 ° C, for about a 2%
reduction in calories; With the outdoor temperature drops, the indoor heat demand they need
increases, it should consider setting auxiliary heat source, the auxiliary heat source can be
electric boilers, oil-fired boiler, gas boiler, steam - water heat exchanger and so on. Per 1RT
refrigeration is configured 0.6kW auxiliary heat source cooled heat pump units is based on
engineering experience to be a safer, such a configuration can fully guarantee the effect of
the whole building air conditioning in the winter.

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