| Title |
Thermodynamic Efficiencies of Organic Rankine Cycles with a Feed Liquid Heater or Regenerator |
| Authors |
박창용(Chang Yong Park) ; 홍웅기(Woong-Ki Hong) ; 김정민(Jung-Min Kim) |
| Keywords |
유기랭킨 사이클 ; 급액가열기 ; 재생기 ; 열역학적 효율 Organic Rankine Cycle(ORC) ; Feed Liquid Heater(FLH) ; Regenerator ; Thermodynamic efficiency |
| Abstract |
A numerical study was performed for thermodynamic efficiencies of a basic ORC (Organic Rankine Cycle), ORC with a FLH (Feed Liquid Heater), and ORC with a regenerator. The efficiencies of the basic ORC were higher in the order of R113, R123, R245ca, and R245fa for its working fluids. It was confirmed that an optimal FLH pressure existed to maximize efficiency of the ORC with a FLH. A correlation was developed to predict the optimal FLH pressure as a function of evaporation and condensation pressure and its average absolute deviation was 0.505%. The efficiency enhancement of the basic ORC with a FLH was higher than that with a regenerator. It was presented that the basic ORC efficiency could be improved more than 10% by a FLH with 30℃ condensation and over 110℃ evaporation temperatures. |