A Control Strategy for a Chemical Heat Pump Dryer

ABSTRACT This article presents results of an experimental investigation on the controllability of hot air production using a pair of chemical heat pumps (CHP). The objective of this study is to determine how a CHP-assisted batch dryer can be operated effectively. The CHP uses the well-known CaO/H2O/Ca(OH)2 hydration/dehydration reaction, which is reversible. The hot air temperature can be controlled by adjusting the reactor temperature, and pressure, as well as thermal power supplied to it. It is shown that hot air can be produced in both the heat storage and heat release steps of the CHP.

[1]  Arun S. Mujumdar,et al.  FINITE-ELEMENT SIMULATION AND VALIDATION OF STEPWISE DRYING OF BANANAS , 2004 .

[2]  J. C. Ho,et al.  Convective Drying with Time-Varying Heat Input: Simulation Results , 2003 .

[3]  A. Mujumdar,et al.  Enhancement of Energy Efficiency of a Chemical Heat Pump-Assisted Convective Dryer , 2003 .

[4]  Arun S. Mujumdar,et al.  Effects of heat exchange condition on hot air production by a chemical heat pump dryer using CaO/H2O/Ca(OH)2 reaction , 2002 .

[5]  A. Mujumdar,et al.  EXPERIMENTAL STUDIES ON A NOVEL CHEMICAL HEAT PUMP DRYER USING A GAS–SOLID REACTION , 2001 .

[6]  Hiranao Ogura,et al.  PROPOSAL FOR A NOVEL CHEMICAL HEAT PUMP DRYER , 2000 .

[7]  昌信 架谷,et al.  CaO / H2O / Ca (OH) 2 系反応を利用した冷熱生成の検討 , 1993 .

[8]  昌信 架谷,et al.  Ca (OH) 2/CaO系ケミカルヒートポンプにおけるフィン挿入型固体反応層の伝熱解析 , 1992 .

[9]  昌信 架谷,et al.  Ca(OH)2/CaO反応系ケミカルヒートポンプにおける固体反応層の伝熱性能向上に関する実験的検討 , 1991 .

[10]  仁樹 松田,et al.  CaSO4 (1/2) H2O/CaSO4系熱化学反応サイクルの化学蓄熱への応用に関する基礎研究 , 1986 .

[11]  仁樹 松田,et al.  Ca(OH) 2 /CaO可逆熱化学反応を利用した化学蓄熱に関する化学速度論的研究 , 1985 .

[12]  C. B. Hurd,et al.  THE THERMAL DISSOCIATION OF CALCIUM HYDRIDE , 1931 .

[13]  M. Hasatani,et al.  Two-Stage Thermal Decomposition of Solids in Convection Type Packed Beds , 1971 .

[14]  P. E. Halstead,et al.  769. The thermal dissociation of calcium hydroxide , 1957 .