Abstract
A new process for fabricating composite reactive block composed of the expanded graphite and reactive salt for the heat transformer system is proposed. The suitable condition to expand the graphite is found to be over 700°C for 15 min, and the reactive salt is impregnated by immersing the expanded graphite in the reactive salt solution. The performance of the heat transformer using the composite reactive block is accordingly simulated. It is found that the gas volume has quite important effect on the matching of the reacting rates and consequently it affects the system performance. The system COP is higher in the case of small gas volume, in particular when the driven temperature is high.
