Design and analysis of sewage and ground water source combined heat pump air conditioning systems

According to the characteristic of water source in China Petrochemical Qilu Limited Company Supplying and Discharging Water Factory, reforms the original air conditioning and heating system. Ground water is used as the cooling water source of heat pump units in summer; a great deal of production sewage is used as extracted heat sink for units in winter. Testing results show that indoor air temperature satisfies the design criteria, the increased equipment costs can be reclaimed within two years although there is an increase in air conditioning area.