Central Air Conditioning System, Energy-saving Study

Nowadays, along with the increasingly short energy, the whole social pays more attention to the research on energy saving. As a main consumer of energy, the building industry takes up about 30% of the total energy consumption. And the research on energy saving in building industry has never suspended since 1970s.The Design standards for energy efficiency of public buildings (GB50189-2005) was put into practice in July 1st, 2005, which puts forward higher requests to the energy saving of buildings. On the basis of such a background, this paper is dedicated to launch a research to the air-conditioning system energy saving in building.The large temperature difference of chilled water can lower the energy consumption of water pump and achieve to economize energy in the air conditioning system; however, it will influence the function of the AHU, lower its refrigeration power and dehumidifying capability, and in turn increase the energy consumption of air conditioning system. This paper makes a thorough research on the issue, putting forward a new solution for the central air conditioning system to resolve the conflict.The main conclusions of this paper are as follows:Firstly, the paper puts forward a new solution of central air conditioning system that includes the series connection of new breeze plants and end equipment. Usually, in the design for large difference temperature, new breeze plants are in parallel with the end equipment, and the temperature difference in new breeze plants is the same with that in end equipment, which increases the energy consumption of plants, while economizing the power of chilled water pump. This new solution can not only ensure that the temperature difference between the both sides of end equipment meets the request, but also lower the negative effect on the end equipment.