氨水吸收式熱泵系統效率提昇研究－應用薄膜裝置

Study on performance enhancement for ammonia-water absorption heat pump using membrane devices

陳相如(Siang-Ru Chen)

指導教授 ： 張煖

淡江大學/工學院/化學工程與材料工程學系碩士班/碩士(2005年)

https://doi.org/10.6846/TKU.2005.00739

摘要

本論文提出一個創新的新裝置，以中空纖維模組作為具有混合氣液質傳與熱交換功能之裝置，並探討應用於氨水吸收式熱泵之吸收器的性能。嚴謹之熱質傳模式用以模擬此裝置之性能與熱質傳特性，並與另一文獻報導之具鰭設計之板式熱交換器式吸收器進行比較。中空纖維模組型式較之板式熱交換器型式具有十倍以上之單位體積界面面積，且多項熱質傳係數均較高。熱質傳阻力分析結果顯示只有吸收液相質傳係數較為顯著，但影響程度不高。對整體冷凍系統之性能而言，採用中空纖維模組型式吸收器可使性能係數提升14.8％。

關鍵字

吸收式熱泵 ； 薄膜 ； 中空纖維薄膜模組 ； 氨水

並列摘要

An innovative device is proposed which uses a hollow fiber membrane module as both a gas-liquid contactor and a heat exchanger. The performance of the device as an absorber in the ammonia-water absorption heat pump system, HFMAE (hollow fiber membrane absorber and exchanger), is investigated. A rigorous mathematical model for HFMAE considering the heat and mass transfers of the ammonia-water absorber is used to simulate the performances and heat and mass transfer characteristics. Performances of HFMAE and a falling film type absorber using a plate heat exchanger with an offset strip fin (PHEFFA) are compared by simulation for employed as the solution-cooled absorber and the water-cooled absorber in the heat pump cycle. The unit volume interfacial area of HFMAE is more than ten times higher than PHEFFA and the heat and mass transfer coefficients are higher too. The analysis indicated that the major resistance is in liquid phase for both heat and mass transfers. For a typical ammonia-water absorption chiller, using HFMAE as the absorbers can result in an improvement in COP (coefficient of performance) of 14.8%.

並列關鍵字

absorption heat pump system ； hollow fiber membrane module ； membrane ； ammonia-water ； PHEFFA ； HFMAE

參考文獻

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Dimitro, M. Z. and K. K. Sirkar, “Polymeric Hollow Fiber Heat Exchangers: An Alternative for Lower Temperature Application,” Ind. Eng. Chem. Res., Vol. 43, pp. 8093-8106, 2004.

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