エジェクタを用いた冷媒蒸気再循環による蒸発器の伝熱促進と冷凍サイクルの性能向上

Translated title of the contribution: The Performance of Refrigeration Cycle with Vapor Re-circulation Evaporator Using an Ejector

万尾 達徳, 谷野 正幸, 岡崎 多佳志, 小山 繁

Research output: Contribution to journalArticle

Abstract

We have proposed new method that re-circulates vapor refrigerant into the evaporator using an ejector to enhance the evaporating heat transfer in the refrigeration cycle. It makes the evaporating heat transfer coefficient higher by increase of the dryness-quality at the inlet of evaporator. We investigated experimentally the coefficient of performance (COP) of the refrigeration cycle and the evaporating heat transfer coefficient with a proposal means, under various evaporating and condensing temperatures and heat loads. As a result, the COP of proposed cycle is 5-13% higher than the conventional cycle with a D.C. inverter compressor by re-circulation of refrigerant. Furthermore, we investigated the dry-out length in the evaporator by authorized empirical equation and evaluated the optimum flow rate of re-circulation.
Translated title of the contributionThe Performance of Refrigeration Cycle with Vapor Re-circulation Evaporator Using an Ejector
Original languageJapanese
Pages (from-to)265-272
Number of pages8
Journal日本冷凍空調学会論文集
Volume23
Issue number3
DOIs
Publication statusPublished - Sep 30 2006
Externally publishedYes

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