摘要
采用恒温、升温和降温3种温度模式对热泵干燥竹荚鱼的干燥特性及色泽变化进行了研究。结果表明:采用适宜的初始温度和循环时间,热泵变温干燥能够缩短干燥时间,显著提高半干竹荚鱼片的色泽。竹荚鱼最适合热泵变温干燥的条件为20℃(3.5h)→25℃(3.5h)→30℃(3.5h)→35℃(3.5h)。
Horse mackerels were dried in a heat pump dehumidifier （HPD） which is capable of producing stepwise control of drying air temperature. Two stepwise air temperature profiles were tested. The drying characteristics and total color difference （AE） of the products dried under these stepwise variation of temperature were measured and compared with constant air temperature drying. It was observed that by employing stepwise change in drying air temperature with the appropriate starting temperature and cycle time, it was possible to reduce drying time to reach the desired moisture content with significantly improved product color. The optimum condition for time-varying temperature drying of horse mackerel was step-up profile with initial temperature of 20℃ and cycle time of 3.5 h.
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
2008年第4期83-86,共4页
Transactions of the Chinese Society for Agricultural Machinery
基金
国家“863”高技术研究发展计划资助项目(项目编号:2006AA09Z430、2006AA09Z444)
关键词
竹荚鱼
热泵干燥
变温
干燥特性
色泽
Horse mackerel, Heat pump drying, Time-varying temperature, Drying characteristics, Color
