蒸發冷卻模組應用於汽車空調機之性能研究

A study of the effects on an evaporative cooling unit of automotive air conditioner.

鄭如均(Cheng Ju Chun)

指導教授 ： 鄭慶民 ； 鄧敦平

國立臺灣師範大學/科技與工程學院/機電工程學系/碩士(2022年)

https://doi.org/10.6345/NTNU202201727

摘要

本研究利用蜂巢式纖維紙板製成不同厚度的蒸發冷卻板，並針對汽車空調機開發出冷凝器蒸發冷卻模組。蒸發冷卻模組設置於室外機冷凝器入風處，並引流冷凝水平均分配水流至紙板上方，以預冷室外機側之空氣溫度的方式，提升冷凝器的散熱效果，進而提高空調機的運轉效率。研究的環境標準參照CNS-7897-D3079汽車用冷氣機檢驗法測試，設定低溫條件(C1：30℃)、標準條件(C2：35℃)及高溫條件(C3：40℃)；冷卻板的厚度則分別為CM1（2 cm）、CM2（3 cm）以及CM3（5 cm）。研究結果顯示，在C3條件下，CM2與CM1在1000 rpm轉速下分別可提升能源效率（EER）達40.74%與29.63%；裝設蒸發冷卻模組在1800 rpm轉速均可提升EER，其中以CM3表現最佳，可提升EER達63.44%為。然而，在C1條件下，1000及1800 rpm轉速均無法提升冷氣能力，此種現象主要是因為在低溫條件之下蒸發冷卻量較低，導致蒸發冷卻提升冷凝器的散熱量低於冷凝器裝設蒸發冷卻板低降低風量所造成的散熱量下降。然而，在現今臺灣夏季高溫的條件之下，運用蒸發冷卻模組去提升汽車空調機的性能方面仍深具潛力。

關鍵字

蒸發冷卻 ； 蜂巢式紙纖維 ； 車用空調機 ； 冷凝器散熱

並列摘要

The evaporative cooling module in this study is composed of a water flow distribution system made of honeycomb fiberboard is designed for vehicle air conditioner. There are three evaporative cooling modules with different thicknesses , which are installed at the air inlet of the condenser of the outdoor unit. And the condensed water is drained to evenly distribute the water flow to the top of the cardboard, so as to pre-cool the air temperature on the outdoor unit side, to improve the heat dissipation of the condenser.
The environmental standards studied are tested with reference to CNS-7897-D3079 automobile air conditioner inspection method, and low temperature conditions (C1), standard conditions (C2) and high temperature conditions (C3) are set. The research results show that under the condition of C3, CM2 has a better energy efficiency ratio at 1000 rpm, and its variation rate is 40.74%, followed by 29.63% of CM1; while the energy efficiency at 1800 rpm is all positive, with CM3 63.44% is the best. However, the variation rates of the air-conditioning capacity under the conditions of C1 temperature, 1000 and 1800 rpm are all negative, indicating that the indirect evaporative cooling module cannot effectively improve the air-conditioning capacity at low temperature. The possible reason for this phenomenon is that the capacity of the air conditioner decreases and the amount of condensed water decreases, so that the evaporative cooling module cannot perform effective evaporative cooling.

並列關鍵字

none

參考文獻

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[5] 經濟部統計處，工業產銷存動態調查-產品統計。取自https://dmz26.moea.gov.tw/GMWeb/investigate/InvestigateDA.aspx