Practical Diagnostic Approach Of Energy Consumption And Systematic Fault Of Ac System

The energy in the world is facing severe challenges, also the problem of the energy shortage is severe increasingly. In china, the status of the energy is worrying, so energy saving is the realistic choice our country faced. AC system(air-conditioning system)is a big energy consumer, consume large part of the whole social energy consumption, with providing comfortable and healthy indoor environment for people living and working. How to reduce the energy consumption of the air-conditioning systems is becoming the urgent project and important task to the insider even to the whole society.At present, a lot of investigations show that for most reasons, almost all the air-conditioning systems are operating in low efficiency, even in morbid mode and waste a mass of energy unnecessary. If this part of the energy consumption can be reduced, the whole building energy consumption will be greatly reduced, while, to realize this objective, the performance verification and diagnosis of air-conditioning system should be taken. Based on the analysis and research of the diagnosis of the energy consumption and fault of air-conditioning systems, and according to the principle of scientific, reasonable and practical, a theoretical method for guide the diagnosis of the energy consumption and fault of air-conditioning systems is proposed in this paper. With this method, the actual operation characteristics of HVAC systems can be qualitatively and quantitatively analyzed and evaluated, and to do diagnosis and reform to HVAC systems , finally improve the system synthesis characteristic.This method is proposed on the basis of the TRNSYS simulation software and the concept of deviation of systematic index. The energy consumption and the main node parameters hourly can be simulation calculated for the systems in ideal mode and then do comparison to the value in practical mode, calculate the deviation, finally evaluate whether the system is operating in normal condition.According to this theory method and combined with a model HVAC system, a general method for system diagnosis is established, and this method is used in an actual HVAC system once more for verification.