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Título
The equivalent low-dissipation combined cycle system and optimal analyses of a class of thermally driven heat pumps
Autor(es)
Materia
Three-heat-source cycle model
Low-dissipation assumption
Performance bound
Optimal analyses
Thermally driven heat pump
Clasificación UNESCO
2213 Termodinámica
Fecha de publicación
2020-09
Resumen
[EN]The performance characteristics, operation, and design strategies of a class of thermally driven heat pumps are
investigated due to their important roles in the efficient utilization of low-grade thermal energy. In order to
establish a more generic thermodynamic model of thermally driven heat pumps mainly including absorption,
adsorption, and ejector heat pumps, low-dissipation assumption is adopted. Accordingly, the associated dissipation
parameters accounting for the specific information on the irreversibilities in each heat-transfer process
are introduced rather than specifying heat-transfer law. Based on the proposed model, the theoretical results of
the coefficient of performance and heat load are derived with regard to two key parameters denoting the size
ratio of the two involved subsystems and the matching deviation from reversible limit. The performance
characteristics and the optimally operating regions of the whole system are determined and the differences
between thermally driven heat pump and refrigerator are highlighted. The proposed model and obtained results
further develop the low-dissipation model
URI
DOI
10.1016/j.enconman.2020.113100
Versión del editor
Colecciones
- GIOETFE. Artículos [53]