Global unsteady state simulation of compression type heat pump with modular analysis - Effect of intermittent driving on system performance

Keisuke Ohno, Kiyoshi Saito

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Performance of the compression type heat pump has increased greatly due to the inverter technology and heat transfer improvement. But, in the case of start-up, shut-down and intermittent driving, heat pump performance decreases. To improve the efficiency of the heat pump more, we have to grasp the characteristics of these driving in detail. For this purpose, characteristics of the heat pump must be predicted by the simulation globally. In recent study, we suggested the modular analysis as general-purpose thermal system analysis. In this study, we construct unsteady state simulation model of the compression type heat pump and carry out the simulation by using modular analysis. The validity of the simulation model is investigated by experiment using package type air conditioning system whose rated power input is 2.16 kW. As a result, the validity of the simulation model was confirmed by the comparison of simulation results with the experimental ones. For example, experimental data of the pressure were predicted with relative error less than 10%. And it was clarified that the intermittent driving performance of the heat pump is affected by operating method greatly.

Original languageEnglish
Title of host publication5th Asian Conference on Refrigeration and Air Conditioning, ACRA 2010 - Green Breeze from Asia
Subtitle of host publicationFrontiers of Refrigerants, Heat Transfer and System
PublisherJapan Society of Refrigeration and Air Conditioning Engineering (JSRAE)
ISBN (Electronic)9781634391252
Publication statusPublished - 2010 Jan 1
Event5th Asian Conference on Refrigeration and Air Conditioning - Green Breeze from Asia: Frontiers of Refrigerants, Heat Transfer and System, ACRA 2010 - Tokyo, Japan
Duration: 2010 Jun 72010 Jun 9

Publication series

Name5th Asian Conference on Refrigeration and Air Conditioning, ACRA 2010 - Green Breeze from Asia: Frontiers of Refrigerants, Heat Transfer and System

Conference

Conference5th Asian Conference on Refrigeration and Air Conditioning - Green Breeze from Asia: Frontiers of Refrigerants, Heat Transfer and System, ACRA 2010
CountryJapan
CityTokyo
Period10/6/710/6/9

Keywords

  • Compression refrigeration
  • Heat pump
  • Intermittent driving
  • Unsteady state simulation

ASJC Scopus subject areas

  • Engineering(all)
  • Environmental Engineering

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  • Cite this

    Ohno, K., & Saito, K. (2010). Global unsteady state simulation of compression type heat pump with modular analysis - Effect of intermittent driving on system performance. In 5th Asian Conference on Refrigeration and Air Conditioning, ACRA 2010 - Green Breeze from Asia: Frontiers of Refrigerants, Heat Transfer and System (5th Asian Conference on Refrigeration and Air Conditioning, ACRA 2010 - Green Breeze from Asia: Frontiers of Refrigerants, Heat Transfer and System). Japan Society of Refrigeration and Air Conditioning Engineering (JSRAE).