Abstract
Sorption cycles have been extensively developed for waste heat recovery to deliver cooling, heating, and electricity. Chemisorption cycles using metallic salts as sorbents and ammonia as working fluid have been explored in this work for the maximum potential of pure power generation. In order to get better understanding and more insights, resorption power generation cycle (RPGC) has been theoretically investigated and compared with pumpless organic Rankine cycle (PORC). The PORC operates without a liquid pump in conventional ORC and shares the similar configuration with RPGC. Three different organic fluids (pentane, R123 and R245fa) used in PORCs and four different reactant salts (manganese chloride, strontium chloride, barium chloride and sodium bromide) used in RPGCs have been analysed and evaluated in terms of the power generation capacity, thermal efficiency and energy density under the conditions of heat source temperature from 60°C to 180°C and heat sink temperature at 30°C. The PORCs have higher thermal efficiency of work output for most cases in the studied scenarios, while RPGCs are evidently superior on energy density, at least as twice large as that of the PORCs studied. RPGC and PORC both have intermittent and dynamic operation, and the former one has the potential to have multiple energy productions or perform as energy storage.
Highlights
Due to the strengthened awareness of the importance of sustainability, sorption cycles including absorption and adsorption have enjoyed the increasing attention because of their remarkable advantages of benign environmental impact and avoidance of using depletable fossil fuels
In the following comparative analysis which aims at the maximum power generation, the resorption power generation cycle (RPGC) Case-one will compete with pumpless organic Rankine cycle (PORC) since those both have their full potential for power generation
As promising technologies for low grade heat recovery, resorption power generation cycles (RPGC) with four different metallic salts and the pumpless ORCs (PORC) with three different working fluids have been theoretically explored and compared for the maximum potential of power generation only, the integrated resorption cycles are capable of multiple energy productions
Summary
Due to the strengthened awareness of the importance of sustainability, sorption cycles including absorption and adsorption have enjoyed the increasing attention because of their remarkable advantages of benign environmental impact and avoidance of using depletable fossil fuels. New challenges come alone with new technologies It is well-known that a typical singleeffect ammonia-based chemisorption refrigeration cycle (termed as conventional adsorption cycle in the context) consists of one solid sorbent-contained reactor, one condenser and/or one evaporator. The downsides of operating at lower pressure is that the condensing temperature for the adsorption heat dissipation has to be lower than it is necessary in conventional adsorption cycle; it is unfavourable with respect to mass transfer issue especially during the lowpressure process of cold generation [23] When it comes to the integrated system for power generation, resorption cycle can take advantage of the lower equilibrium pressure of the secondary sorbent so that the pressure difference between upstream and downstream of the expander is amplified when with the given primary sorbent. Three different organic working fluids, pentane, R123 and R245fa, have been evaluated for PORC
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
