節能外氣空調系統之研究與開發

The Research and Development of the Outdoor Air Conditioning System for Energy Saving

郭誌宏(Chih-Hung Kuo)

指導教授 ： 李魁鵬

國立臺北科技大學/機電學院/能源與冷凍空調工程系碩士班/碩士(2008年)

https://doi.org/10.6841/NTUT.2008.00194

摘要

傳統空調系統在消除和防止生物性或化學性污染方面，無特殊的考量，容易產生下列問題，如：全空氣系統的回風容易引發交叉污染，送風機系統的冷凝水蓄水盤有滋生細菌的可能等。為了避免產生交叉汙染與細菌滋生的問題，需引進大量的外氣來改善，但是外氣溫度與室內之溫度相差甚遠，會造成室內大量的耗能，所以採用獨立外氣空調系統，潛熱負荷均由外氣空調系統消除並負擔部份顯熱，剩餘顯熱負荷由末端空調在乾盤管狀態下消除。避免了因凝結水帶來的"水患"等問題，也可以提高室內空氣品質以及人體舒適感。由於乾盤管只處理顯熱負荷，所以可以採用較高溫度的冰水，進而提升冷凍機COP值，以達節能的目的。
本研究開發新型獨立式外氣空調系統，並將程式撰寫於可程式控制器(PLC)來控制冷媒迴路使同一台機組下達到三種模式包括︰冷氣模式、暖氣模式與低溫低濕模式。再藉由外氣模擬與負載變動模擬實驗，驗證本文所建立之新式獨立外氣空調系統三種不同運轉模式之性能。
結果發現無論在冷氣模式、暖氣模式或者是低溫低濕模式下，各種模式下均能發揮當初所設計之理念來達到冷卻、加熱與低溫低濕之效果。在量測結果中可以發現各個模式在壓縮機變頻調控與風扇變頻調變下，在不同的頻率發揮出不同的冷凍能力與加熱能力，可以匹配在不同之負載時，運行在最適合的頻率下來達到省電的效果，避免能源消耗過度的現象產生。此舉可有效的達到節能的效果，減少耗電量，提高能源使用效率，可在不降低生活品質之前提下，減少能源使用量，延長人類慣用之能源使用年限，減緩地球之溫室效應。

關鍵字

獨立外氣空調系統 ； 變頻控制 ； 室內空氣品質 ； 舒適感

並列摘要

Because of the traditional air condition system didn’t eliminate and avert the biological and chemical polluter, it is easy to happen some problem, for example: the all-air system return air easy to initiate the overlapping pollution and fan coil system condensed water plate possibly to multiply the bacterium. For avoiding this kind of problem, it needs to inject outdoor air to improve it. But the difference in temperature between outdoor and indoor air is huge, which caused great energy-loss of air condition. Therefore, using the dedicated outdoor air system can reduce load of latent heat and afford some load of sensible heat. The remnants of sensible heat can reduce by the end of air condition system in dry-coil state. It can prevent the condensed water and enhance the indoor air quality and thermal comfort of human. Because the dry-coil only eliminatess the load of sensible heat, it can use the chilled water of higher temperature. This way can elevate the COP of refrigerator, which cause the energy-saving.
The purpose of this study is the exploitation of new dedicated outdoor air conditioning system, and use the PLC to control the refrigerant loop to make the same machine to achieve three models: cooling、heating and dehumidify with cooling model. It verified the performance of three different model of the new dedicated outdoor air system by simulated experiment of the outdoor air and the changing load.
It is found all of the models can get in the cooling、heating and dehumidify with cooling. In the measurement of three model, three ways under variable and control on the frequency of compressor and fan, which show different cooling capacity and heating capacity by frequency conversion when align different load, behave adaptable frequency to energy saving, avoid energy deucedly depletion. It can save energy to reduce the electric losing and augment the efficiency of energy using. Without lower the life quality, it reduces the using energy rate, longer the energy using year and reduced the emission of carbon dioxide.

並列關鍵字

Dedicated Outdoor Air System ； Variable Frequency Control ； Indoor Air Quality ； Thermal Comfort

參考文獻

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