Operation Model And Application Of Exhuast Air Heat Recovery Technology Into Hospital Building

With the rapid development of economic and the advancement of health care reforms,hospital construction has been developed rapidly,and the construction standards have been increased as well,resulting in hospital buildings’ energy consumption increased rapidly.and whose most of electronic energy was used for the HVAC system.Under the environment of reduction of energy consumption and emissions,to guarantee the operation of the air conditioning system and energy consumption have become an important thesis.And heat recovery from indoor exhaust air is an important way to achieve energy efficiency of air-conditioning system.Through reading related literature, I realized that there exist some problems when designing heat recovery installment in air-conditioning system in the hospital building. For example, the volume of fresh air and exhaust air is difficult to maintain positive pressure of the room; the equipment operation control is difficult to achieve maximum recovery; heat recovery efficiency is differences between standard state and non standard state.Under the condition of guarantee medical treatment and anti-internal hospital infection.this paper is on the basis of meteorological data of typical year in five representative city, respectively,Xi’an,Beijing,Shanghai,Chongqing and Guangzhou. Compared to the minimum economic enthalpy(temperature) value and the hourly outdoor enthalpy(temperature) value, getting the best operation time by hourly calculation.Secondly, combining with the existing assessment methods of heat recovery, the article sets up a new economic analysis method, calculates average efficiency and minimum heat recovery efficiency of heat recovery equipment under a payback period,. which provide the scientific basis for selecting heat exchangers.The author accounts for design in engineering application through a typical engineering example with heat recovery system.Using a experienced formula combined with the average air temperature and humidity, get the value, and it is used to calculate energy of heat recovery,using the average efficiency of equipment and minimum economic efficiency of enthalpy value. Found energy of heat recovery by this method is closer to by the hourly calculation.In this paper, heat recovery installments’ assessment method and running time for hospitals,this will be a great impact on the hospital design and energy—saving of exiting hospital,and which will have a greater theoretical significance and practical application value.