MECHANICAL REFRIGERATION DEHUMIDIFIER PERFORMANCE EVALUATION IN A TOMATO GREENHOUSE IN COLD REGIONS

作者：Han J; Guo H; Brad R; Waterer D

来源：Transactions of the ASABE, 2016, 59(4): 933-941.

DOI：10.13031/trans.59.11662

• Dehumidification
• Greenhouse
• Heat exchanger
• Mechanical refrigeration dehumidifier

A commercial-grade mechanical refrigeration dehumidifier was installed in a tomato greenhouse for humidity control, and relative humidity was monitored for a year. The results indicated that the indoor RH condition was controlled much better by the dehumidifier than by the previous air-to-air heat exchanger. Considering a 10-year payback period, the annual cost of the dehumidifier was about $4000 in 2013. Even though the capital cost and annual cost of the dehumidifier were high, the plant loss rate due to high relative humidity was dramatically reduced from 43.3% prior to 2012 without dehumidification to 0.9% in 2013. The annual revenue was also increased by about 10% in 2012, compared with that in 2009 to 2011. The increased revenue indicated that the equipment payback period was within one year. Considering all the benefits, dehumidification is strongly recommended for greenhouse humidity control in cold regions.

• 出版日期2016
• 单位Saskatoon; Saskatchewan