A novel internally hybrid absorption-compression heat pump for performance improvement

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

28 Scopus Citations
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Author(s)

  • Tian You
  • Jian Wang
  • Baolong Wang
  • Wenxing Shi
  • Xianting Li

Related Research Unit(s)

Detail(s)

Original languageEnglish
Pages (from-to)237-251
Journal / PublicationEnergy Conversion and Management
Volume168
Online published9 May 2018
Publication statusPublished - 15 Jul 2018

Abstract

Heat pump technologies play significant roles in building energy saving and emission reduction. Combing the opposite characteristics of the electrical and absorption heat pumps, a novel internally hybrid absorption-compression heat pump was proposed for performance improvement. The thermodynamic models for the hybrid heat pump using two cycles (single-effect and generator-absorber-heat-exchange) were built for component design and performance simulation with various refrigerant distribution ratios. Results show that a higher absorption-side refrigerant ratio generally makes the primary energy efficiency less sensitive and the capacity more sensitive to working condition. In the heating mode, a higher absorption-side refrigerant ratio brings about a higher efficiency when the evaporator inlet temperature is below 16 °C and 20 °C for the two cycles. In the cooling mode, a lower absorption-side refrigerant ratio contributes to a higher efficiency. The hybrid absorption-compression heat pumps can realize flexible heating/cooling capacity ratios to accommodate the design heating/cooling loads as necessary. Generally, a higher absorption-side refrigerant ratio is preferred in colder conditions owing to the higher heating efficiency and the higher heating/cooling capacity ratio, well matching the heating-dominant building loads. This study focuses on the principle and performance of the novel hybrid heat pump, the applications in actual buildings will be conducted through year-round simulations in future studies.

Research Area(s)

  • Absorption heat pump, Absorption-compression, Ammonia, High efficiency, Hybrid heat pump, Performance improvement

Citation Format(s)

A novel internally hybrid absorption-compression heat pump for performance improvement. / Wu, Wei; You, Tian; Wang, Jian; Wang, Baolong; Shi, Wenxing; Li, Xianting.

In: Energy Conversion and Management, Vol. 168, 15.07.2018, p. 237-251.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review