2.2 small water / air heat pump unit
Generally, the air conditioning system of water ring heat pump is indoor, which is installed in each room according to the indoor load. Users in each room can adjust the heating or cooling of the room at any time of the year according to the change of outdoor temperature and different requirements, without affecting the temperature of other rooms. Because it is easy to adjust and can not overheat the room, it not only avoids the energy waste of the conventional air conditioning system, but also creates a good indoor environment. At the same time, the indoor small water / air heat pump unit is also convenient for household metering and household charging.
For the owner, if the conventional air-conditioning system is adopted, the water chiller and other equipment must be purchased at one time, which will often cause great financial pressure, and the water chiller can not play its benefits until it is installed for one or two years; the small water / air heat pump unit in the water loop heat pump air-conditioning system can be invested in stages, constructed in batches, or even installed layer by layer before the user moves in. It has high return on investment and quick effect. This feature also makes the water loop heat pump air conditioning system have a market in the renovation or system transformation of old buildings, because the conventional air conditioning system can not avoid damaging the original structure, and it is not easy to find a suitable refrigerator room, generally it also needs the whole building to be closed for the transformation project, resulting in great economic losses.
For the designer, because of the use of small indoor water / air heat pump units, there will be no large air ducts, water chillers, etc., so the system layout is more compact, simple and flexible, and there is no need to set up air conditioning room (or reduce the area of the room), which also increases the use area and effective space for the owner. Water loop heat pump air conditioning. For the construction party, because the small water / air heat pump unit can be assembled in the project, the installation workload of the construction site is reduced.
2.3 auxiliary equipment
If the auxiliary equipment such as heat storage device is added to the water loop heat pump air conditioning system, the economy of the system will be improved. Because the heat storage device can achieve the balance between the condensation heat released from the inner District refrigeration unit to the water circulation loop and the heat absorbed from the surrounding district heating unit from the water circulation loop in a day or longer period of time, thus reducing the annual energy consumption of the cooling tower and water heater.