College】 【weak ground source heat pump hot six key technology --- Power By 【China】 weak home network.

<br> 1. relative to the output temperature of 55 degrees below the heat pump technology, high-temperature ground-source heat pump without increasing the low temperature heat source (ground source) temperature cases, heat pump heating temperature reaches 60 degrees or more, and maintain high operating efficiency .and a stable operating state, the general need to address the following key technologies. .<BR> <BR> 2. Compressors choice: the current type of heat pump equipment, used mainly in compressors screw compressors, totally enclosed and semi-hermetic scroll compressor, piston compressor, the compressor through the operating characteristics of different types of .a comparative study, the current high-temperature heat pump equipment generally used in semi-hermetic piston compressor. .<BR> <BR> 3. Refrigerant choice: high-temperature heat pump equipment based on the maximum working pressure of less than or equal 25BAR, to adopt environmentally friendly R134A refrigerant as a refrigerant for the environment pollution-free, non-destructive to the ozone layer; < .BR> <BR> 4. circulatory system design: using multiple independent refrigeration cycle system, share a water system, reducing the device's operating temperature and pressure condensation; <BR> <BR> 5. within the device for an additional special .thermal unit (economizer), increased the stability of equipment operation; <BR> <BR> 6. System Control Optimization: The optimization of the average running time of the compressor control mode to ensure the stability of the overall unit operation and the use of prolonged .life, and base heat source temperature and winter temperature, adjust the working conditions and high temperature heat pump operating conditions. .<BR> <BR>.