Application Study On Saving Energy Of Air Conditioning System In Coolant Temperature

Energy conservation and emission reduction is also more and more attention by people.With the further development of the national economy. Because in many of China’s city the air conditioning of summer is heavier in proportion of Energy consu mption. So power supply is insufficient. Peak load of air conditioning has been more than45million kW, it equivalent to2.5times the full load output of the Three Gorges Power Station.Many areas in summer had to switch power brownouts. Development and utilization of new energy as air condition cold source in recent years made objective results, But the new technology itself in practice needs further testing.and the new technology promotion application still need for a period of time. According to different regions applicability is not the same. how to set energy in the existing air conditioning system design parameters on also have important role. The determination of reasonable refrigerant temperature optimization design can make reduce energy consumption. Interior design parameters are also should weigh the advantages and disadvantages of energy conservation and comfort. Do both can energy-saving and guarantee comfort and design parameters are also different regions should be different.Refrigeration loop through the thermodynamic calculation of the refrigerant temperature on the energy consumption and COP of refrigerator; Through the centralized cooling pipe network calculation of transport energy consumption and investment, Analysis of the refrigerant temperature on the transport energy consumption, pipeline network investment and the loss of the cold outside the network; Discussed Coolant temperature and radiation energy saving cooling system; On the surface cooler for thermal calculation, Analysis.the different refrigerant temperatures cooler the air the final table the state point to deal with the cold and water resistance; Also analyzed the number of table rows and the cooler temperature on the surface cooler refrigerant dehumidification capacityRefrigerant temperature is important for performance of refrigeration unit.If the Cold load is constant, and supply and return frozen water temperature difference is certain circumstances. Water supply temperature is lower, the greater the energy consumption of refrigerating units,and COP will be lower. If the water supply temperature rise1℃, compressor every power will drop3.3%, COP will be drop3.6%. For centralized cooling, if the water supply temperature is certain, Improve the temperature difference of supply water makes outer net investment decrease. When supply and return water temperature difference improve1℃, the cost of outside nets almost cut down12%. Temperature increase also can make conveying reduce energy consumption. Also found that the total loss of external network outside the cooling rate of net energy consumption is very small, the water temperature rise is very small long-distance transportation.For a given type of surface cooler, Initial state point in the air, through the surface cooler air volume is constant, determine the size of coolers capacity for supply and return water temperature,, when water temperature is constant, Factors that determine the size of the return water temperature is cooler by the flow of water table, so the size of the return water temperature is cooler water flow reconciliation after the performance. Apparatus dew point to avoid the conventional air supply air to eliminate hot and cold air conditioning in the form of offset, if you want air dew point using the machine, and the air temperature is less than10℃, relative humidity of interior design should be more than50%.That set reasonable parameters of interior design can effectively reduce energy consumption, With hot wet climate dominated areas can increase the relative humidity, lower the temperature set with interior design parameters, Both ergonomic comfort and can reduce air conditioning energy consumption.Coolant temperature influence the refrigeration unit performance, external network investment and on transport energy consumption.For these three areas in order to make energy-saving air-conditioning system should be adjusted on the coolant temperature. The higher the water temperature, the greater the supply and return water temperature the betterfor energy saving. So for radiant cooling, temperature and humidity independent control system. Refrigerator energy consumption in a small, low power consumption advantage of conveying reflected. As the air coolers removed from hot and cold air when the dew point offset by decreased energy consumption. The dew point will cause the results of indoor air humidity is higher than the set value. Dew point will be used to improve indoor air relative humidity and high relative humidity, consistent with the conclusions of energy.