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: Frontiers of Refrigerants, Heat Transfer and System
    PublisherJapan Society of Refrigeration and Air Conditioning Engineering (JSRAE)
    ISBN (Print)9781634391252
    Publication statusPublished - 2010
    Event5th Asian Conference on Refrigeration and Air Conditioning - Green Breeze from Asia: Frontiers of Refrigerants, Heat Transfer and System, ACRA 2010 - Tokyo
    Duration: 2010 Jun 72010 Jun 9

    Other

    Other5th Asian Conference on Refrigeration and Air Conditioning - Green Breeze from Asia: Frontiers of Refrigerants, Heat Transfer and System, ACRA 2010
    CityTokyo
    Period10/6/710/6/9

    Fingerprint

    Pumps
    Technology transfer
    Hot Temperature
    Air conditioning
    Systems analysis
    Heat transfer
    Experiments

    Keywords

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

    ASJC Scopus subject areas

    • Engineering(all)
    • Environmental Engineering

    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 Japan Society of Refrigeration and Air Conditioning Engineering (JSRAE).

    Global unsteady state simulation of compression type heat pump with modular analysis - Effect of intermittent driving on system performance. / Ohno, Keisuke; Saito, Kiyoshi.

    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), 2010.

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

    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. Japan Society of Refrigeration and Air Conditioning Engineering (JSRAE), 5th Asian Conference on Refrigeration and Air Conditioning - Green Breeze from Asia: Frontiers of Refrigerants, Heat Transfer and System, ACRA 2010, Tokyo, 10/6/7.
    Ohno K, Saito K. 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. Japan Society of Refrigeration and Air Conditioning Engineering (JSRAE). 2010
    Ohno, Keisuke ; Saito, Kiyoshi. / Global unsteady state simulation of compression type heat pump with modular analysis - Effect of intermittent driving on system performance. 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), 2010.
    @inproceedings{05c5f0805db84b639b4eace3809e7aa1,
    title = "Global unsteady state simulation of compression type heat pump with modular analysis - Effect of intermittent driving on system performance",
    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.",
    keywords = "Compression refrigeration, Heat pump, Intermittent driving, Unsteady state simulation",
    author = "Keisuke Ohno and Kiyoshi Saito",
    year = "2010",
    language = "English",
    isbn = "9781634391252",
    booktitle = "5th Asian Conference on Refrigeration and Air Conditioning, ACRA 2010 - Green Breeze from Asia: Frontiers of Refrigerants, Heat Transfer and System",
    publisher = "Japan Society of Refrigeration and Air Conditioning Engineering (JSRAE)",

    }

    TY - GEN

    T1 - Global unsteady state simulation of compression type heat pump with modular analysis - Effect of intermittent driving on system performance

    AU - Ohno, Keisuke

    AU - Saito, Kiyoshi

    PY - 2010

    Y1 - 2010

    N2 - 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.

    AB - 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.

    KW - Compression refrigeration

    KW - Heat pump

    KW - Intermittent driving

    KW - Unsteady state simulation

    UR - http://www.scopus.com/inward/record.url?scp=84914680399&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=84914680399&partnerID=8YFLogxK

    M3 - Conference contribution

    AN - SCOPUS:84914680399

    SN - 9781634391252

    BT - 5th Asian Conference on Refrigeration and Air Conditioning, ACRA 2010 - Green Breeze from Asia: Frontiers of Refrigerants, Heat Transfer and System

    PB - Japan Society of Refrigeration and Air Conditioning Engineering (JSRAE)

    ER -