Research On Comfort Study Of Evaporative Cooling Air Conditioning Based On Exergy Analysis

The running energy consumption of evaporative cooling air conditioning is low, which is about the same amount of mechanical refrigeration cooling system power consumption of 1/3 ~ 1/5 or so. Evaporative cooling air conditioning has high energy efficiency, can create a high indoor air quality. Study this air conditioning model is important for building energy efficiency. Systematically studying the comfort of evaporative cooling air conditioning is relatively scarcity,in particular, lacking of thermal comfort standards applying for evaporative cooling air conditioning. And most studies are based on the traditional steady-state thermal comfort standards,to evaluate and predict the results with real human thermal sensation agreement remains to be verified. So researching the suitable thermal comfort for evaporative cooling air conditioning is conducive to the promotion of evaporative cooling air conditioning.According to the correlation between thermal comfort and human ergonomics, human ergonomics is the best of results in the thermal comfort environment, human work to, putting forward from the ergonomic point of view, by analyzing the relationship between the human body exergy loss and indoor thermal environment, resulting in indoor thermal comfort and indoor environment contact. It can be used for analyzing evaporative cooling air conditioning thermal comfort.Based on the existing body exergy balance model and the second law of thermodynamics, re-completely deriving and simplifying the human body exergy balance model. The resulting model simplify the existing body exergy model avoiding general model is too complicated and each uses different thermodynamic model.Constructing a typical office building model of Urumqi region, calculating summer indoor thermal load in interior temperature of 19 ~ 31 ℃ of 13 design condition and indoor air supply parameters of evaporative cooling air conditioning and the traditional mechanical refrigeration air conditioning on the psychrometric chart, air temperature and volume were calculated of two kinds of air conditioning way.By ANSYS14.5 software, 13 interior design temperature conditions of temperature field and velocity field of two-room air conditioning method was simulated to obtain the different conditions in both air-conditioning mode, obtaining the different conditions of the ground 1.1m and 0.5m indoor temperature and velocity field under both air conditioning modes.Simplifying the two nodes model of Gagge, the model was simulated by MATLAB programming, Respectively obtaining the body core temperature Tcr and skin temperature Tsk of 13 indoor 19 ~ 31 ℃ design conditions of evaporative cooling air conditioning and traditional air-conditioned room when the body reaches to steady state after entering the room.Solving the results by using MATLAB programming model for the human body exergy calculation, respectively obtaining the body exergy loss and PMV value of 13 design conditions corresponding to 1.1m and 0.5m planes from the ground, fitting exergy losses and exergy flow curves with MATLAB, carrying out trend analysis and different air conditioning modes under different height changes from the ground. In order to give the best interior design evaporative cooling temperature of Urumqi office buildings, analyzing the indoor thermal comfort and indoor temperature dependence of evaporative cooling air conditioning using the fitting result of exergy loss and the indoor temperature.