发明授权
- 专利标题: Double pinch criterion for optimization of regenerative Rankine cycles
- 专利标题(中): 用于优化再生兰金循环的双重标准
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申请号: US13475816申请日: 2012-05-18
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公开(公告)号: US09091183B2公开(公告)日: 2015-07-28
- 发明人: Hussam Zebian , Alexander Mitsos
- 申请人: Hussam Zebian , Alexander Mitsos
- 申请人地址: US MA Cambridge
- 专利权人: Massachusetts Institute of Technology
- 当前专利权人: Massachusetts Institute of Technology
- 当前专利权人地址: US MA Cambridge
- 代理机构: Pepper Hamilton LLP
- 代理商 Thomas J. Engellenner; Reza Mollaaghababa
- 主分类号: F01K7/34
- IPC分类号: F01K7/34 ; F01K27/00 ; F01K13/00 ; F01K13/02 ; F01K7/22 ; F01K7/40 ; F01K17/06 ; F22D1/32 ; F01K25/08 ; F01K7/24
摘要:
Systems and methods are disclosed herein that generally involve a double pinch criterion for optimization of regenerative Rankine cycles. In some embodiments, operating variables such as bleed extraction pressure and bleed flow rate are selected such that a double pinch is obtained in a feedwater heater, thereby improving the efficiency of the Rankine cycle. In particular, a first pinch point is obtained at the onset of condensation of the bleed and a second pinch point is obtained at the exit of the bleed from the feedwater heater. The minimal approach temperature at the first pinch point can be approximately equal to the minimal approach temperature at the second pinch point. Systems that employ regenerative Rankine cycles, methods of operating such systems, and methods of optimizing the operation of such systems are disclosed herein in connection with the double pinch criterion.