FURTHER RESULTS IN AMMONIA/WATER COABSORBENT TECHNOLOGY DISTRICT TRIGENERATION

摘要

Previous author papers analyze the coupling of thermal power plants (e.g. Steam (Organic) Rankine Cycle (S(O)RC), or Diesel engine type), with Coabsorbent Technology (CT) for district combined cooling, heating and power (CHP, i. e. Trigeneration) production. This work presents ammonia/water further research results thereof. First, district heating with coabsorbent heat pumps coupled to S(O)RC vs. S(O)RC cogeneration heating are comparatively assessed with a simple model. Unlike usual heat pumps, coabsorbent ones can perform better than heating in cogeneration, but feasibility studies must be done for each application. Second, S(O)RC-CT vs. S(O)RC-MVC (Mech. Vap. Compress.) CHP systems are evaluated with respect to electrical power output for same cooling and heating loads, within a large range of cooling (0 to -70°C) and heating (70 to 150 °C). Coabsorbent candidates selection found nontruncated cooling fractal be best for cooling up to -35 °C, with relative primary energy savings and comparative electrical efficiency of (23.9 - 26.6) % and η_(e,cbs) /η_(e,mvc)=1.46-1.73, respectively. Cooling, up to -70 °C, and air conditioning recommend truncated fractals and H_2O/LiBr quadruple-effect fractals use, respectively. Improvements include operation with low- or non-volatile absorbent working combinations. Work results encourage S(O)RC-CT trigeneration R&D. Besides known applications, CO_2 mitigation for clean energy, and district electrical power distribution net cooling, saving power and paving the way of future high-temperature superconductors large scale utilization, might be considered.