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題 名 | 真空預冷及其能源分析 |
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作 者 | 陳貽倫; | 書刊名 | 農業工程學報 |
卷 期 | 32:1 1986.03[民75.03] |
頁 次 | 頁43-50 |
分類號 | 434.251 |
關鍵詞 | 分析; 真空; 能源; 預冷; |
語 文 | 中文(Chinese) |
中文摘要 | 本文引用並分析8次萵苣,1次花椰之真空冷卻實驗及其能源消耗數據。每批萵苣之冷卻過程耗時不需半小時;每公噸萵苣冷卻處理所耗電力不超過10.5仟瓦小時;該真空冷卻設施對冷卻萵苣而言,其能源效率係數(COP)平均為2.65。 使用真空冷卻設施,可有下列可能途徑以節約能源:(1)真空室要滿載;(2)冷凍系統之壓縮機在閃變點附近才開動;(3)選用大小合宜、高效率之馬達;(4)適量提高冷媒壓縮機之進氣壓力以提高冷媒循環之COP之值;同時,增加其真空室冷凝管熱交換面積;(5)利用壓縮機冷卻過程中有7分鐘的空載時間之冷凍能量來補償其冷卻尖峰負荷,從而降低其總電容量。 |
英文摘要 | Vacuum cooling performance and energy consumption experiment data of 8 runs for lettuce and 1 run for cauliflower were cited and analyzed, Less than 30 minutes and less than 10.5 kwh/m. ton were required to cool lettuce from 23℃ to 2℃. The average coefficient of performance of vacuum cooling equipment was found to be 2.65 when lettuce was cooled. Conservation of energy could be achieved if, (1) The vacuum tube is fully loaded with produce; (2) The compressor of the refrigeration system would not be turned on until at the flash point; (3) Proper size and high-efficiency motors would be selected for driving the different components of the system; (4) Suction pressure of the refrigerant compressor would be raised by raising the evaporating temperature, and at the same time, increase the heat exchange surface of the condensing coils in the vacuum tube. (5) A way could be found to utilize the refrigeration capacity of the compressor during the 7-minutes idling period of the cooling cycle to compensate the peak load requirement of the cycle, so that more or less flatten load curve would be obtained. |
本系統中英文摘要資訊取自各篇刊載內容。