Analysis of large enthalpy difference lab using high-temperature heat pump to recover condensing heat

The condensation heat of water chiller is too hard to be effectively recycled in the air conditioning system of traditional large enthalpy difference lab, and a large amount of heat is directly discharged into the air, which leads to high electric heating power and operation energy consumption. According to the analysis of the cold and heat source of a 300 kW enthalpy difference lab, proposes to use the high-temperature heat pump to recover the condensing heat and reduce the electric heating power. Combined with the test data, analyses the energy saving effect of this sensible scheme. The results show that, compared with the conventional chiller and electric heating system, the cold and heat source mode of chiller and high-temperature heat pump plus auxiliary electric heating system applied to the large enthalpy difference lab features the distribution capacity saving of about 246.8 kW, the annual operating cost is saving of about 223 600 Yuan, the cooling tower’s water flow rate reduction of about 41.0 m3/h and the annual carbon emissions reduction of about 67.9 tons.