Maximum power of a multistage Rankine cycle in low-grade thermal energy conversion

2014 ◽  
Vol 69 (1-2) ◽  
pp. 78-85 ◽  
Author(s):  
Takafumi Morisaki ◽  
Yasuyuki Ikegami
Keyword(s):  
Energy Conversion ◽  
Thermal Energy ◽  
Rankine Cycle ◽  
Maximum Power ◽  
Low Grade ◽  
Thermal Energy Conversion

Direct Method to Maximize Net Power Output of Rankine Cycle in Low-Grade Thermal Energy Conversion

2010 ◽  
Vol 2 (2) ◽  
Author(s):  
Faming Sun ◽  
Yasuyuki Ikegami
Keyword(s):  
Energy Conversion ◽  
Thermal Energy ◽  
Power Output ◽  
Direct Method ◽  
Rankine Cycle ◽  
Working Fluid ◽  
Carnot Cycle ◽  
Low Grade ◽  
Thermal Energy Conversion ◽  
Net Power Output

Using ammonia as working fluid, enthalpy equations corresponding to every point in Rankine cycle for low-grade thermal energy conversion (LTEC) are presented by employing curve-fitting method. Analytical equations of Rankine cycle analysis are thus set up. In terms of temperatures of the evaporator and condenser, the equation related to Rankine cycle net power output is then achieved. Furthermore, by using theoretical optimization method, the results of the maximum net power output of a Rankine cycle in LTEC are also reported. This study extends the recent flurry of publications about Rankine cycle power optimization in LTEC, which modified the ideal Rankine cycle to a Carnot cycle by using an average entropic temperature to achieve the theoretical formulas. The proposed method can better reflect the performance of Rankine cycle in LTEC since the current work is mainly based on the direct simulations of every enthalpy points in Rankine cycle. Moreover, the proposed method in this paper is equally applicable for other working mediums, such as water and R134a.

Stack Thermo-Osmotic System for Low-Grade Thermal Energy Conversion

2021 ◽  
Author(s):  
Ji Li ◽  
Zikang Zhang ◽  
Runze Zhao ◽  
Bo Zhang ◽  
Yunmin Liang ◽  
...  
Keyword(s):  
Energy Conversion ◽  
Thermal Energy ◽  
Low Grade ◽  
Thermal Energy Conversion ◽  
Osmotic System
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