Performance analysis on high temperature air source heat pump coupling cycle based on industrial waste heat

doi:10.3969/j.issn.2097-0706.2023.07.005

Abstract

Abstract:

Industrial waste heat，with a wide range of temperature，can be hardly utilized by conventional ways. Heat pumps can recovery medium and low temperature waste heat effectively， safely and environmental-friendly with low energy consumption. However， traditional absorption heat pumps and compressive heat pumps can only work in a narrow temperature range due to the limitations of thermodynamic cycle， thermodynamic properties of their working mediums and temperature and pressure resistance of their compressors， which cannot meet the requirements of "high heating temperature" and " wide temperature range heat transfer" of industrial waste heat recovery. To solve the problems above， an ultra-high temperature air source heat pump unit based on absorption and compression coupling cycle is proposed. The unit can recover heat from industrial waste steam（120 ℃） and air to produce 160 ℃ hot water（vapor）. The proposed coupling cycle is modelled and simulated by Engineering Equation Solver（EES）. The results show that the COP of the heat pump unit peaks at 1.600 under the optimal working condition under which hot water temperature is 130 ℃ and outdoor temperature is 30 ℃. When the hot water temperature rises to 160 ℃， the COP of the heat pump unit will be 1.400. The coupling cycle greatly broadens the working temperature range of heat pumps and improves their heating temperature. The study is of certain reference value for heat pumps in industrial waste heat recovery， and can significantly improve the utilization rate of primary energy in industrial field.

Key words: absorption heat pump, compressive heat pump, coupling cycle, waste heat recovery, air source heat pump

CLC Number:

TK115

SUN Jian, QIN Yu, HAO Junhong, YANG Yongping. Performance analysis on high temperature air source heat pump coupling cycle based on industrial waste heat[J]. Integrated Intelligent Energy, 2023, 45(7): 40-47.

Figures/Tables 5

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