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題名 | 應用熱泵低溫低濕乾燥機乾燥農產品之研究=Study on the Application of a Low Temperature Low Humidity Heat Pump Dryer for the Drying of Agricultural Products |
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作者姓名(中文) | 鄭太一; 鍾志琛; 謝欽城; | 書刊名 | 永達學報 |
卷期 | 7:1 民95.06 |
頁次 | 頁11-22 |
分類號 | 463.7 |
關鍵詞 | 熱泵低溫低濕乾燥機; 魩仔魚; 臺灣咖啡; 愛玉子; 山藥; A low temperature low humidity heat pump dryer; Larval fish; Taiwan coffee; Ficus awkeotsang makino; Yam; |
語文 | 中文(Chinese) |
中文摘要 | 乾燥技術的應用很廣。在我國有十分悠久的歷史,然而隨著工業的發展,乾燥的應用領域也加速擴大,幾乎各種工業製程都涵蓋了乾燥程式。本研究之乾燥機為熱泵低溫低濕乾燥機,本機構包含冷媒壓縮機、兩組蒸發器、兩組凝結器、軸流式送風機、控制器。 本研究目的在於找出魩仔魚、臺灣咖啡生豆、愛玉子、山藥乾燥加工最佳製程,將產品利用不同乾燥方式,以熱風乾燥、恆溫恆濕乾燥及低溫乾燥,探討其對於魩仔魚、臺灣咖啡生豆、愛玉子、山藥乾燥製程,對於其品質變化之影響,找出最佳之乾燥加工製程,並加以運用於低溫低濕乾燥機加工開發推廣,增加其利用性及實用性,且能達到消費者所能接受之品質。 應用熱泵低溫低濕乾燥機來進行魩仔魚乾燥研究,結果顯示:低溫乾燥最適溫度為32℃及38℃,時間為2.5~4.0小時,乾燥時以煮乾品魩仔魚為原料經過熱泵低溫低濕乾燥機乾燥之成品經理化性、水活性、色澤變化、脂肪酸及鮮度分析結果較熱風乾燥機乾燥後之成品品質為佳。咖啡豆經不同溫度乾燥時,咖啡之成分會有變化,愈接近自然日曬溫度(30℃)所乾燥之品質愈好。30℃低溫低濕乾燥之咖啡生豆品質優良,可作為推廣應用之參考。愛玉子乾燥時間與日曬法比對,可節省3至4天,不同的乾燥方法與各溫階乾燥的愛玉子,作試驗分析其值皆有所不同,其中以30℃乾燥之愛玉子洗出愛玉凍,與業者和日曬法愛玉子洗出愛玉凍比對結果,發現其試驗值極為相近,在本試驗結果,顯然30℃為最適乾燥溫度。山藥乾燥溫度設在50℃以上會影響山藥成份,在低溫低濕45℃乾燥山藥之乾燥時間最短,成本較低,故知低溫低濕乾燥機在45℃乾燥山藥為最佳乾燥條件。 |
英文摘要 | The technology of drying is applied widely. There is a long history for the application of drying technology is our country. With the development of industry, application of drying technology has been expanded that it is used in various kinds of industry. The desiccators constructed in this research is a low temperature and low humidity dryer with heat pump. It includes a Freon compressor, two evaporators, two condensers, a blower, and a controller. The purpose of this research is to find out the best programs for the drying of larval fish, Taiwan coffee bean, Ficus awkeotsang makino, and yam. Alterations in the compositions and appearance of the products during preservation were examined. The effects of different drying methods on the qualities of the products were explored, including hot air, constant temperature and humidity, and low temperature, aiming to define the best program for the drying of the above agricultural products. The goal of this research is to develop and demonstrate the efficiency of the low-temperature, low-humidity heat-pump dryer in order to improve its application and practicability for the consumers. When the low-temperature, low-humidity heat-pump dryer was used in the drying of larval fish, it was shown that the optimal temperature for low-temperature drying was 32°C and 38°C for 2.5~4.0 hours. In order to boil the universe product when larval fish experiment is dry. Compared with hot-air dryer, the physiology, water activity, color change, fatty acid valence, and VBN of the larval fish dried by heat-pump low-temperature low humidity dryer prevailed. The experimental result of coffee bean shows by different temperature when it is dry. The quality would be better if the temperature is close to that of the nature drying method especially at 30°C. The best quality of coffee beans which is a valuable finding will be obtained for farmers to refer. The experimental result of Ficus Awkeotsang Makino shows, the drying time could be three to four days less than the sun-dry method, and the result showed that the awkeo-jelly formed from Ficus Awkeotsang Makino dried at 30°C was very similar to the ones purchased from merchants and dried with sundry method. Therefore, drying temperature of 30°C was the most appropriate. The investigations also show that the composition of Yam was changed when drying was conducted at a temperature higher than 50°C. Drying time was shortest at 45°C in the low temperature-low humid dryer, and thus the cost is lowest of all. It is therefore concluded that the best condition for drying Yam is at 45°C in the low temperature-low humid dryer. Therefore, the application of the low-temperature, low-humidity heat-pump dryer in the drying of larval fish, Taiwan coffee bean, Ficus Awkeotsang Makino, and yam was shown to be successful. Thus, it is worth of promotion for various applications. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。