Exergetic performance assessment of a ground-source heat pump drying system
Küçük Resim Yok
Tarih
2007
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Wiley
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
In evaluating the efficiency of heat pump (HP) systems, the most commonly used measure is the energy (or first law) efficiency, which is modified to a coefficient of performance (COP) for HP systems. However, for indicating the possibilities for thermodynamic improvement, energy analysis is inadequate and exergy analysis is needed. This study presents an exergetic assessment of a ground-source (or geothermal) HP (GSHP) drying system. This system was designed, constructed and tested in the Solar Energy Institute of Ege University, Izmir, Turkey. The exergy destructions in each of the components of the overall system are determined for average values of experimentally measured parameters. Exergy efficiencies of the system components are determined to assess their performances and to elucidate potentials for improvement. COP values for the GSHP unit and overall GSHP drying system are found to range between 1.63-2.88 and 1.45-2.65, respectively, while corresponding exergy efficiency values on a product/fuel basis are found to be 21.1 and 15.5% at a dead state temperature of 27 degrees C, respectively. Specific moisture extraction rate (SMER) on the system basis is obtained to be 0.122 kg kW(-1) h(-1). For drying systems, the so-called specific moisture exergetic rate (SMExR), which is defined as the ratio of the moisture removed in kg to the exergy input in kWh, is also proposed by the authors. The SMExR of the whole GSHP drying system is found to be 5.11 kg kW(-1) h(-1). Copyright (c) 2006 John Wiley & Sons, Ltd.
Açıklama
Anahtar Kelimeler
COP, drying, exergy analysis, exergetic coefficient of performance, ground-source heat pump, heat pump, laurel leaves, performance evaluation, SMER, specific moisture exergetic rate
Kaynak
International Journal of Energy Research
WoS Q Değeri
Q2
Scopus Q Değeri
Q1
Cilt
31
Sayı
8
