【 Weak current College 】 centralized air conditioning system and heat source selection

Common ways of heat and cold sources: electric refrigeration units plus boiler, LIBR absorption chiller with boiler, heat pump chiller, LIBR absorption chiller, electric refrigeration units plus boiler plus ice storage system.
Article above and heat source equipment performance characteristics and energy consumption, a one-time investment, environmental pollution, the applicable conditions for analysis and choice of air-conditioning heat and cold source.

1, considering from the performance characteristics
Mainly the reliability of the operation of equipment, technology advanced, energy-saving, compact structure, install the operation and maintenance convenience, noise and vibration, etc. Overall, the electric chiller is technically better than thermal-water chiller-mature and reliable, in debugging, maintenance than the heat-generating units. The heat source to urban heating network heating as preferred.
2, from investment considerations
In the choice of air-conditioning heat and cold sources equipment, the equipment needed at the beginning of the investment and operating costs for comprehensive analysis. LIBR absorption chiller less power consumption, low power MEF, but the price is higher than the same amount of electricity produced in cold refrigeration units high. From the initial investment, primary energy consumption and operating costs, superior thermal-electric. Air source heat pump unit than conventional refrigerator plus boiler at the beginning of the investment programme generally save 25%.
3. consider from energy consumption
Absorption chiller of primary energy consumption ratio high electric system unit, steam or hot water-double-effect absorption chiller energy consumption for electric 2 ~ 3 times. Direct-about electric 1.6 ~ 2.1 times. If no waste heat can use hot water-mill in General should be minimal, no special circumstances would not be appropriate to introduce a new steam boiler for absorption chiller of heat. Refrigeration mechanism when the COP value lower ice, cold air conditioning than conventional air conditioning consumes more power-saving cannot be called. But the power supply system, the cool-the peak shift, balanced the power grid load, improving the power grid power supply capability.
4, from environmental pollution aspects to consider
Heat and dust pollution on the environment than pollution dispersion boiler house, taking electric unit of CFC on the ozone layer and heat-generating greenhouse gas CO2 emissions and emissions of SO2.
5, from device applicability pieces into consideration
Because different air-conditioning heat and cold sources devices have different performance characteristics that apply to certain external conditions. In areas of tension, lithium bromide absorption unit can be used as air conditioning cold source preferences, including direct-fired chiller generally use light diesel oil or gas as fuel, emissions of small but high fuel costs. When environmental protection requirements, high land prices, higher power MEF, winter need heating, and the technical and economical comparison more reasonable, you can use direct-fired chiller. On the introduction of time-of-use pricing policy areas, there are more cool air conditioning broad development prospects. On water deficit zone may consider air cooled chiller.