冰水主機應用不同散熱方法之全年系統性能係數分析-以商業建築為例

Annual Coefficient of Performance Analysis for Chillers Using Different Heat Rejections as Applied to Commercial Buildings

謝博智(Po-Chih Hsieh 謝博智)

指導教授 ： 蔡尤溪

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(2009年)

https://doi.org/10.6841/NTUT.2009.00013

摘要

商業建築中央空調系統一般大都應用水冷式冰水主機，鮮少應用氣冷式冰水主機或是蒸發冷卻式之冰水主機，本文將以系統性能係數（System coefficient of performance）的觀點，利用動態負荷模擬軟體eQUEST（Quick Energy Simulation Tool）模擬一商業建築之中央空調系統冰水機應用不同的散熱器之耗能分析。
在中央空調系統冰水主機部份應用不同散熱器之建築全年耗能模擬結果為：水冷式冰水機部份為808,928.6 kWh、氣冷式冰水主機部分為824,587.5 kWh及蒸發冷卻式冰水主機部分為750,396.0 kWh；若再應用不同的節能方法進行模擬分析可發現到應用VWV系統可減少1.8~3％的全年耗電量、VAV系統可減少10~11％的全年耗電量；VWV系統及VAV系統若同時應用，更可發現全年耗電量減少14~16％；若以其系統性能係數分析及比較，可以得到整年度的水冷式系統性能係數平均值為2.97、氣冷式為2.74、蒸發冷卻式為3.45。
因此，以年耗電量來看，商業建築中央空調系統若不應用其他的節能手法，在長時間的運轉下應用水冷式或氣冷式冰水主機系統對於全年度的耗能是相差無幾的；在本研究中也考慮了一個蒸發冷卻式冰水主機作為對比，發現到蒸發式冷卻系統不管在年度耗電量或是系統性能係數上皆優於水冷式及氣冷式冰水機系統。

關鍵字

系統性能係數 ； 模擬 ； 建築耗能 ； 節能 ； eQUEST

並列摘要

The air conditioning systems of commercial buildings mostly employ the water-cooled, less with the air-cooled or evaporation-cooled systems. This study introduces the concept of SCOP (System coefficient of performance). The tools for the energy analysis are the DOE 2 eQUEST (Quick Energy Simulation Tool) program. Simulation of annual Coefficient of Performance for chillers using different heat rejections systems are applied to Commercial Buildings.
It was found that the power consumption for chillers using different heat rejections are 808,928.6 kWh, 824,587.5 kWh, 750,396.0 kWh, respectively for water-cooled, air-cooled and evaporation-cooled. Then different energy-saving methods were simulated and analyzed. It was found that the VWV system can reduce 1.8~3% of annual energy use, and for VAV system 10~11%. If analyzed and compared for SCOP, the water-cooled is 2.97, the air-cooled is 2.74 and evaporation-cooled is 3.45.
In the view of annual energy consumption, when without employing energy-saving measures for air conditioning system of commercial buildings, energy consumption is nearly the same for water-cooled or air cooling type. The study has found that the annual energy consumption and SCOP of evaporation-cooled is better than the other two heat rejection methods.

並列關鍵字

SCOP ； eQuest ； Energy simulation ； Air-conditioning Power Consumption ； Energy Conservation

參考文獻

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