High-grade energy compensation ratio in a conventional subcritical vapour-compression heat-pump cycle. (25th June 2018)

• Record Type: Journal Article
• Authors: Qv, Dehu; Wang, Jijin; Shang, Runxin; Ni, Long; Yao, Yang
• Is Part Of: Applied thermal engineering. Volume 138(2018)
• Page Start: 490
• Page End: 493
• Publication Date: 2018-06-25
• Subjects: High-grade energy compensation -- Thermodynamic analysis -- Subcritical vapour-compression heat-pump cycle -- High-grade energy-use efficiency; Heat engineering -- Periodicals; Heating -- Equipment and supplies -- Periodicals; Periodicals; 621.40205
• DOI: 10.1016/j.applthermaleng.2018.04.074
• Languages: English
• ISSNs: 1359-4311

Abstract

Highlights: The concept of high-grade energy compensation (HGEC) has been developed and derived. HGEC is helpful for better understanding and assessing the high-grade energy-use efficiency. All derivations are suitable for conventional subcritical vapour-compression heat-pump cycles. COP and/or EER tend to overestimate the high-grade energy-use efficiency. Abstract: The concept of high-grade energy compensation (HGEC) has been developed and derived based on thermodynamic analysis for better understanding and assessing the high-grade energy-use efficiency in a conventional subcritical vapour-compression heat-pump (VCHP) cycle. The derivation proposes a lower limit of HGEC ratio in a conventional subcritical VCHP cycle, meaning that the COP and/or EER that we get used to employing for assessing energy efficiency tend to overestimate the high-grade energy-use efficiency.