Thermo-economic evaluation for energy retrofitting building ventilation system based on run-around heat recovery system

Wuyan Li, Xianting Li, Yijun Gao and Wenxing Shi

Energy, 2022, vol. 260, issue C

Abstract: With the increasingly stringent energy consumption and carbon emission policies enforced in China, the run-around heat recovery system has demonstrated significant potential for the energy retrofitting of existing ventilation systems. To explore the applicable regions of such projects and their optimal design schemes, a novel thermo-economic coupled evaluation model for the run-around heat recovery system is proposed in this study. Additionally, a site investigation for an energy retrofitting project based on the run-around heat recovery system is performed for model validation. The simulation results indicate that the lifecycle profitability of the run-around heat recovery system mainly depends on its heat recovery and initial investment, rather than the operating cost. Moreover, the optimal design scheme and corresponding regional adaptability for the system in China are evaluated in this study. It is observed that an run-around heat recovery system can be profitable in majority of the regions in China, except in certain southern regions; northern China is considered to have the largest application potential for this system. Based on the simulation results, another model based on polynomial fitting is proposed to simplify the evaluation process. Furthermore, the impact of the predicted future carbon cost on regional adaptability is discussed in this study.

Keywords: Run around heat recovery; Exhaust air heat recovery; Regional adaptability; Economic analysis (search for similar items in EconPapers)
Date: 2022
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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:260:y:2022:i:c:s0360544222019375

DOI: 10.1016/j.energy.2022.125041

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