Thermodynamic analysis of a cascade refrigeration system
Küçük Resim Yok
Tarih
2016
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Polish Academy of Sciences
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
There is a need for cooling by using the waste heat energy in food industry. Absorption cycles can be driven by waste thermal, geothermal, solar or industrial processes energies. In this study, cascade refrigeration system is thermodynamically modeled, and analyzed by using first law of thermodynamics, and exergy method. Thermodynamic properties such as pressure, temperature, entropy, enthalpy, exergy, mass flow rate in each stream are calculated for 50, 75, 100?C and for 0.8, 1.0, and 1.5 MPa pump pressure. A computer program is used that was prepared in FORTRAN by the author for the analyses. It is found that the compression-absorption cascade cooling cycle is appropriate for most of the kind of waste heat applications. Increase of the generator inlet heat temperature increases the generator inlet heat, the absorber outlet heat and the condenser 2 outlet heat energies and decreases the coefficient of performance of the absorption and the overall cycles. The generator heat decreases with increase of the pump pressure. Also increase of the pump pressure decreases the coefficient of performance of the absorption and the overall cycles. Increase of the pump pressure and the generator temperature decreases the exergetic coefficient of performance. Increase of the generator temperature and pump pressure increases the generator inlet exergy. It is concluded that increase of the generator temperature and the pump pressure increases the total destructed exergy of the cycle.
Açıklama
Anahtar Kelimeler
Exergy, Refrigeration, Temperature, Thermal processing (foods), Thermoanalysis, Thermodynamic properties, Thermodynamics, Waste heat, Cascade refrigeration systems, Coefficient of Performance, Compression-absorption, First law of thermodynamics, Generator temperature, Industrial processs, Temperature increase, Thermo dynamic analysis, Absorption cooling, Exergy, Refrigeration, Temperature, Thermal processing (foods), Thermoanalysis, Thermodynamic properties, Thermodynamics, Waste heat, Cascade refrigeration systems, Coefficient of Performance, Compression-absorption, First law of thermodynamics, Generator temperature, Industrial processs, Temperature increase, Thermo dynamic analysis, Absorption cooling
Kaynak
Acta Physica Polonica A
WoS Q Değeri
Q4
Scopus Q Değeri
Q4
Cilt
130
Sayı
1
