Chemical heat-pump drying

Deng, Y., Y. Liu, B. Qian, S. Su, J. Wu, X. Song, and H. Yang, 2011b. Impact of far-infrared radiation-assisted heat pump drying on chemical compositions and physical properties of squid (Hlex illecebrosus) fillets. European Food Research and Technology, 232(5), 761-768. 

H. Ogura, N. Hamaguchi, H. Kage, and A.S. Mujumdar. Energy and cost estimation for application of chemical heat pump dryer to industrial ceramics drying. Drying Technol. 22(1 2) 307-323, 2004. 

In the chemical heat-pump system, the circulating air gains humidity in the course of drying. In the case under analysis, the relationship between absolute air humidity and the number of cycles can be written as... 

The basic concept of coupling a chemical heat pump to dryers is new and hence not explored in any depth. It appears that chemical heat pumps will need to be designed for continuous (rather than batch) operation if they are to find wide application in industrial drying. In fact, new reaction systems and new reactor designs may be required for drying applications. It is too early to predict the potential of this novel idea. 

Ogura H, Mujumdar AS. Proposal for a novel chemical heat pump dryer. Drying Technology 18(4 5) 1033-1053, 2000. 

Ogura H, Shimojyo R, Kage H, Matsuno Y, Mujumdar AS. Simulation of hydration/ dehydration of CaO/Ca(OH)2 chemical heat pump reaction for cold/hot heat generation. Drying Technology 17(7 8) 1579-1592, 1999. 

Most cleaners are available for < 2.20/kg either as a dry blend or as aHquid. Liquid cleaners are usually less expensive than the dry blend type. A trend toward Hquid cleaners is evident as of this writing (ca 1994) because of convenience features such as automatic additions of the cleaner by chemical feed pump. Safety features such as minimized heat generation upon blending with water to make the desired concentration are also important. 

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