(545c) Self-Heat Recuperative Heat Circulation System By Using Heat Pump Module

The self-heat recuperative thermal process consists of a material flow process with material stream composed of a series of elementary thermodynamic process modules (HR, HT, WR, WT) and a heat exchange module of energy stream (energy conversion module) with exergy destruction due to the heat transfer. Providing the compression work via work receiver (WR) to increase the temperature of the process fluid( T→T+ΔT), the process heat Q can be circulated through the heat exchange module. The minimum work Wmin required for the circulation of process heat which compensate the exergy destruction is converted to the waste heat Qw of which anergy is equal to the exergy destruction T0Sgen as

In general, Wmin is much smaller than the process heat Q, leading to the drastic energy saving more than 50-90%. However, the direct compression by WR is unsuitable for the explosive gas. In such cases, the external heat pump module is preferable.

In this paper, a novel self-heat recuperative thermal process by using heat pump is described and its thermodynamic mechanism is elucidated in terms of exergy analysis such as a modularization method using the module expression flow, temperature-entropy, and energy conversion diagrams.