Energy-Saving Transformation Research On The System Of Ground Source Heat Pump Air-Condition Based On Frequency Conversion Technology

At present,energy is the most important element for the development of states' economy.Because of the good energy-saving effect,using regenerate resource of energy,and no pollution,the GROUND SOURCE HEAT PUMP AIR-CONDITION is used more and more popular now.In the system of the GROUND SOURCE HEAT PUMP AIR-CONDITION,the terminal devices what include the fan,the deep well pump,the circulate pump are the biggest energy-consumed part except the inner device as well as the compressor motor, etc.So it is very important and significant to make the terminal devices running in the most energy-saving condition.In this paper,the author founded on the GROUND SOURCE HEAT PUMP AIR-CONDITION in Guangxi University,based on the actual project condition, made the redesign through the way of frequency conversion technology for the old system of GROUND SOURCE HEAT PUMP AIR-CONDITION.At first, the equipments' running control system were improved following the energy-saving principle of fan and pump,choused Mitsubishi FR series frequency transducer with vector-control function,Mitsubishi FX2N series PLC and other auxiliary parts to make up of the auto-control system for the GROUND SOURCE HEAT PUMP AIR-CONDITION,and then did the emulating analysis for the vector-control mode in the frequency conversion process.In the next based the auto-control system,made the PLC control system designing.This system monitor the temperature and flux in accurate and real time,then input feedback to the plc,finally the terminal device running status will correspond to the customer's demanded-load,it can well meet the goal for saving energy and prolong the life of the motor and other device.At the same time,designed the PLC control process,according to this transformation of the specific programme,programmed for the PLC by using the FX-GP/WIN-C programme software.Researched and analyses the PID algorithm and its improved algorithm for the PID Operational module in the PLC.At last,through detailed analysis and accounted for energy-saving effect and the cost of the system-reforming,validated the profitability of this redesigned-project,and showed its feasibility and worth.