Development of fast calculation method for ammonia refrigeration cycle and parameter adjustment with genetic algorithm

Eisuke Togashi, Shinichi Tanabe, Tomohiro Ataku

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

    Abstract

    A parameter adjustment method for an ammonia heat pump chiller using a genetic algorithm (GA) was developed. The parameters were automatically adjusted by the data of performance at rated point. Upon using the proposed adjustment method for parameters, output values of the simulation model agreed quite well with the performance data at rated point. The deviation of output was less than 1.2 [%] from the rated value. To speed up the adjustment process, a new approximation method with neural network was also proposed. This method decreasesthe calculation time required in obtaining refrigerant thermodynamic properties. The time required to calculate saturated and other refrigerant states were decreased by 14 times and 33 times respectively, while the average relative error was less than 0.04 [%] and 0.5 [%] when compared to the exact solution from REFPROP. The time required to calculate the refrigerant cycle decreased 20 times, while relative error was within 3 [%].

    Original languageEnglish
    Title of host publicationIBPSA 2007 - International Building Performance Simulation Association 2007
    Pages596-603
    Number of pages8
    Publication statusPublished - 2007
    EventBuilding Simulation 2007, BS 2007 - Beijing
    Duration: 2007 Sep 32007 Sep 6

    Other

    OtherBuilding Simulation 2007, BS 2007
    CityBeijing
    Period07/9/307/9/6

    Fingerprint

    Ammonia
    Refrigerants
    Refrigeration
    Adjustment
    Genetic algorithms
    Genetic Algorithm
    Relative Error
    Cycle
    Calculate
    Output
    Thermodynamic Properties
    Approximation Methods
    Pump
    Simulation Model
    Speedup
    Thermodynamic properties
    Deviation
    Heat
    Exact Solution
    Pumps

    Keywords

    • Ammonia heat pump
    • Approximation
    • Parameter adjustment
    • Refprop
    • Refrigeration cycle

    ASJC Scopus subject areas

    • Computer Science Applications
    • Building and Construction
    • Architecture
    • Modelling and Simulation

    Cite this

    Togashi, E., Tanabe, S., & Ataku, T. (2007). Development of fast calculation method for ammonia refrigeration cycle and parameter adjustment with genetic algorithm. In IBPSA 2007 - International Building Performance Simulation Association 2007 (pp. 596-603)

    Development of fast calculation method for ammonia refrigeration cycle and parameter adjustment with genetic algorithm. / Togashi, Eisuke; Tanabe, Shinichi; Ataku, Tomohiro.

    IBPSA 2007 - International Building Performance Simulation Association 2007. 2007. p. 596-603.

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

    Togashi, E, Tanabe, S & Ataku, T 2007, Development of fast calculation method for ammonia refrigeration cycle and parameter adjustment with genetic algorithm. in IBPSA 2007 - International Building Performance Simulation Association 2007. pp. 596-603, Building Simulation 2007, BS 2007, Beijing, 07/9/3.
    Togashi E, Tanabe S, Ataku T. Development of fast calculation method for ammonia refrigeration cycle and parameter adjustment with genetic algorithm. In IBPSA 2007 - International Building Performance Simulation Association 2007. 2007. p. 596-603
    Togashi, Eisuke ; Tanabe, Shinichi ; Ataku, Tomohiro. / Development of fast calculation method for ammonia refrigeration cycle and parameter adjustment with genetic algorithm. IBPSA 2007 - International Building Performance Simulation Association 2007. 2007. pp. 596-603
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