Performance Assessments of Organic Rankine Cycle With Internal Heat Exchanger Based on Exergetic Approach

Küçük Resim Yok

Tarih

2018

Dergi Başlığı

Dergi ISSN

Cilt Başlığı

Yayıncı

Asme

Erişim Hakkı

info:eu-repo/semantics/closedAccess

Özet

This study makes energy and exergy analysis of a sample organic Rankine cycle (ORC) with a heat exchanger which produces energy via a geothermal source with a temperature of 140 degrees C. R600a is preferred as refrigerant to be used in the cycle. The changes in exergy destructions (of irreversibility) and exergy efficiencies in each cycle element are calculated in the analyses made based on the effectiveness of heat exchanger used in cycle and evaporator temperature changing between 60 and 120 degrees C for fixed pinch point temperature differences in evaporator and condenser. Parameters showing system performance are assessed via second law approach. Effectiveness of heat exchanger and temperature of evaporator are taken into consideration within the scope of this study, and energy and exergy efficiencies of cycle are enhanced maximum 6.87% and 6.21% respectively. Similarly, exergy efficiencies of evaporator, heat exchanger, and condenser are increased 4%, 82%, and 1.57%, respectively, depending on the effectiveness of heat exchanger and temperature of evaporator.

Açıklama

Anahtar Kelimeler

organic Rankine cycle, exergy analysis, heat exchanger, exergy destruction, pinch point temperature difference

Kaynak

Journal Of Energy Resources Technology-Transactions Of The Asme

WoS Q Değeri

Q3

Scopus Q Değeri

Q2

Cilt

140

Sayı

10

Künye