Journal of Northeastern University(Natural Science) ›› 2025, Vol. 46 ›› Issue (10): 81-88.DOI: 10.12068/j.issn.1005-3026.2025.20240056

• Materials & Metallurgy • Previous Articles     Next Articles

Combined Supply System with Deep Coupling of C-GSHP and COG-CCHP

Ming-jie FENG, Deng-liang WANG, Yu-qian XIA, Sheng-hui LIU   

  1. School of Metallurgy,Northeastern University,Shenyang 110819,China. Corresponding author: WANG Deng-liang,E-mail: wangdengliang0@163. com
  • Received:2024-03-11 Online:2025-10-15 Published:2026-01-13

Abstract:

A novel multi-energy combined supply system was proposed by deep coupling a cascade ground source heat pump (C-GSHP) system and a coke oven gas-based combined cooling, heating and power (COG-CCHP), so as to maximize the utilization of waste heat from the CCHP subsystem, enhance energy utilization efficiency, and adjust to China’s current energy landscape. Based on the Aspen Plus platform, the simulation operation, thermodynamic analysis, and sensitivity analysis of the system’s important parameters were completed. The results indicate that the system’s primary energy utilization efficiency and exergy efficiency are 95.12% and 35.12%, respectively, greater than the traditional system’s 83.80% and 31.80%. The exergy efficiency of compressors and circulating pumps is relatively high, while that of heat exchangers is relatively low. The exergy loss mainly occurs in the combustion chamber and the steam-water heat exchanger, accounting for 48.7% and 29.9% of the total exergy loss of the entire system, respectively. When other parameter values are fixed, the intermediate temperature of the heating circulating water and the outlet pressure of the upper-level circulating compressor are positively correlated with the power consumption of the cascade heat pump circulation subsystem, while the evaporator pressure is approximately negatively correlated with the power consumption of the cascade heat pump circulation subsystem.

Key words: cascade ground source heat pump, coke oven gas based CCHP, operational performance, geothermal energy

CLC Number: