About the load calculation, it mainly depends on the purpose of the building, insulation effect, height and temperature in the area. Generally, in the upper and lower reaches of the Yangtze River, the residential floor height is below 3.5, the load of hydraulic turbine is calculated at 250 watts per square meter, and the fluorine system is calculated at 200 watts. The total load of all internal machines is allowed to exceed the power of the main engine, the excess ratio of the water machine is within 1.5, and the excess ratio of the fluorine system is within 1.2 (individual daikin can be controlled within 1.3).
In the central air conditioning system, "outdoor unit" and "indoor unit" are two links that constitute the whole refrigeration system cycle. When the indoor unit is responsible for exchanging indoor heat with the system, the outdoor unit is responsible for exchanging indoor heat with the outdoor. When the number of indoor units increases within the allowable range, the heat exchanged increases, which naturally requires the outdoor unit to increase the exchange capacity, that is, increase its burden, so that the system can reach a balance and the electric energy consumed by the outdoor unit needs to increase.
Of course, the overload increases the indoor unit, which makes the outdoor unit unable to undertake the exchange work normally and has to run continuously. At this time, the power consumption of the outdoor unit is in a "saturated" state. Adding more indoor units can only reduce the efficiency, and the power consumption of outdoor units will not increase much.
There are also differences between water machine and refrigerant machine in other aspects. In terms of comfort, water machine air conditioner is more comfortable than refrigerant machine because of its large air volume and small temperature difference. The medium of the water machine is water, while the refrigeration/heat medium of the refrigerant machine is refrigerant. The water machine is more expensive, the refrigerant machine is cheaper, the installation of the water machine is difficult, and the arrangement of the refrigerant machine is simple and convenient.