암모니아와 금속염화물간의 가역반응을 이용하는 화학열펌프 시스템은 새로운 냉장 냉동 시스템과 에너지의 효율적 이용 등 여러 분야에 유망하다. 이 시스템의 특징 중의 하나는 화학반응기내 열화현상을 극복하고 열전달 또는 물질전달 특성을 개선시키기 위해 팽창흑연을 지지체로 사용한 점이다. 반응블록의 특성이 균일했던 전과 달리 겉보기밀도가 반경방향으로 증가하도록 고안, 제조함으로써 반응블록내 열전달 특성을 개선하였고, 이때 가스투과율이 작아지는 등 서로 열전달과 물질전달이 상충되는 문제점을 해결하였다. 암모니아와의 반응실험을 통해 비균일블록이 균일블록보다 반응속도가 증가되었고 비균일블록의 열전도도가 향상되었으며 암모니아 분해반응의 경우에도 비균일블록이 우수함을 입증하였다.

The chemical heat pump using the reversible reactions of NH₃ and notal chlorides is being expected to wide applications like the alternative refrigeration and cooling system and effective energy managements. The distinguishing characteristics of this system is utililization of the expanded graphite as a support in the chemical reactor to overcome the deactivation of reaction and improve the heat and mass transfer of reactive medium. In contrast with ordinary reaction block of uniform properties such as apparent density and ratio of expanded graphite, the on-uniform reaction block was designated to increase the apparent density with radial direction, which is able to improve heat transfer properties and solve the troubles which the permeability of ammonia gas get worse while increasing heat transfer. Based on the experimental results, the rate of reaction of the non-uniform block is progressed rapidly and has larger thermal conductivity in the heat transfer zone than the uniform blocks. Additionally the non-uniform blocks are proved to have betterment of reactivity for the decompositive reaction.

Chemical Heat Pump Reaction of NH₃ and Metal Chlorides Consolidated Reaction Block of Expanded Graphite Non-Uniform Carbon-Block

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