The Study Of The Porformance Of Liquid Desiccant Fresh Air Handling Unit

Energy is the basic material factor for the development of economy and society. As the economy evolves, energy of this world is emerging shortage, saving energy is becoming a conmen sense of society. Of all the energy consumptions, construction energy consumption occupies about 30%, while air-conditioning energy consumption more than 50%. Lowering the consumption of the air conditioner becomes a focus because it is an efficient way to save energy and release the energy crises.Nowadays Refrigeration equipment and air handling equipment are completed, though they can meet the demands of comfortableness, it is quit hard to improve the COP based on that. If saving-energy effects are hoped to be improved, new style of equipment must be concerned. Under such circumstance, independent humidity control air conditioning system should be replaced the current system, through dividing the degree of temperature and humidity of fresh air, solving the problems of current control air conditioning system successfully.For this paper, current condition of energy source , problems of system of current air conditioning , and independent humidity control air conditioning system were introductioned. Considering the reality of a building in tianjin, choosing and using independent humidity control air conditioning system to test the style of fresh air handling unit and the properties of core part of it---fresh air handling solution with liquid desiccant total heat recovery, this paper get to the conclusion that the new system could meet the demand humidity of inner air, while with effect of parts of loaded, the EER of fresh air handling unit was kept at 2.9~3.7. In winter, while maintaining the demanded inner humidity, the EER of fresh air handling unit could keep between 5.4~6.5. By contrast, it is clear that the ratio of energy and effect changes like this : the hotter in summer and the colder in winter the temperature is, the higher the efficiency is, so the conclusion is that in hottest and coldest season use fresh air handling unit could save more energy, while in transition season ,the best way is to turn off fresh air handling unit and use nature fresh air.