Design Of Ground Source Heat Pump Air Conditioning Automatic Control System

With the development of economy and improvement of people’s living standards,public buildings and residential heating and air conditioning has become a common requirement.Fossil fuels as a traditional source of heat, which is extensive used have worsened the already serious pollution of the environment, threaten the survival of mankind.Therefore, the development and utilization of new green energy is imminent.Environmental protection energy-saving ground-source heat pump technology is a new technology in this background, the technology and the economy have greater advantages as an alternative to the old air conditioning energy plan.With the development of automatic control technology continues to mature, more and more high, People monitoring of central air conditioning requirements are also getting higher and higher,and the establishment of integrated automation control system has become the necessary conditions for safe production of large-scale central air conditioning.The early central air conditioning system do not have a high level of automation and the system energy consumption, which is leading to system efficiency low.Therefore, to develop a set of energy-efficient automatic control system, has an important significance for reducing the energy consumption of air conditioning and improve the work efficiency.To solve the above problems, put forward the ground-source heat pump air conditioning control system based on CC-link fieldbus.The industrial automation control system which is consisted of industrial fieldbus technology, programmable logic controller and the host computer realized the data communication of the various sub-control system.The equipment working state information and data collected by sensors through PLC processing, integrated in one system management platform, reuse of industrial configuration software to realize the optimization design of computer integrated automation control in air-conditioning system, realize the regulatory control function concentration and integration.Actual site conditions and the requirements for the Dahe ecological garden ground source heat pump central air conditioning applications in Taiyuan Qingxu County, we reasonable designd this control system.In this control system, the PLC as the on-site control equipment.Ground source heat pump system circulating water temperature, pressure, flow, and other information collected through multiple sensors.These information be operated by PLC and be converted into instructions,after that,it is be sent to inverters for stepless speed control of the pumps to improve the operating efficiency of the air conditioning system.Through the CC-Link fieldbus, realized real-time monitoring of the whole system,and the linkage between the sub-control system.In this paper, the design of ground source heat pump central air-conditioning control system is reasonable, flexible, reliable, and its practical application in the ecological park,achieved good economic and environmental benefits.The design has important guiding significance to promote the further extensive application of ground source heat pump central air conditioning.