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

Eisuke Togashi, Shin ichi Tanabe, Tomohiro Ataku

研究成果: Paper査読

抄録

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 [%].

本文言語English
ページ596-603
ページ数8
出版ステータスPublished - 2007 12 1
イベントBuilding Simulation 2007, BS 2007 - Beijing, China
継続期間: 2007 9 32007 9 6

Conference

ConferenceBuilding Simulation 2007, BS 2007
国/地域China
CityBeijing
Period07/9/307/9/6

ASJC Scopus subject areas

  • コンピュータ サイエンスの応用
  • 建築および建設
  • 建築
  • モデリングとシミュレーション

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