The Simulation Of The Building Air Conditioning Systems’ Energy Consumption And The Analyze Of Its Optimal Operation

In this thesis, it mainly analyse the actual energy consumption of air conditioningsystem in different ways through the simulation method, and to determine the optimalmode of operation. By analysising the development of the energy around the world,and the development of China’s building energy consumption and the optimal controltheory to determine the main content of this paper and the ways adopted to do theresearch. Through the practical engineering modeling and the simulation study on therelevant software platform,to analyze the impact of the different control system to theair conditioning system in its major energy-consuming components and theair-conditioning system, thus to select the most optimal way to achieve the mostenergy-efficient and most economical operation.By programming for the mathematical model for the equipment of the aircondition system,and to decct the relative error, it know that the mathematical modelsof the components have a high accuracy, can be the aid for the practical engineeringresearch.With the practical engineering, it builds the model of the air conditioning coolingsource system, by analyzing their energy consumption under different regulatorymethods, under the lowest energy consumption in refrigeration quarter as theobjective function to select the optimal operation mode. In the case of constant flowof cooling water, the total energy consumption of the system is increasing with thecondenser water temperature’s increase, and the proper selection of the cooling waterpump can have a larger impact on the total energy consumption.In the case of variable flow of cooling water, the chiller’s energy consumptionhave a ratio of about11.7%energy savings comparing with the constant flow. Thecooling water pump’s energy consumption save68.5%compared to the constant flow.The cooling towers’ energy consumption are very close during this two cases. And thetotal energy consumption of the air-conditioning system can have an energy-saving ofabout35.9%than the case of constant flow of cooling water.Through the analysing of the actual project, it proposes to adopt the variable flowof cooling water to control the operation of the air-conditioning system, thus tooptimize the system, thus to achieving the purpose of the most energy-efficient, themost economical and the most environmentally operation.