Selection of a Working Fluid for an Organic Rankine Cycle Coupled to a Salt-Gradient Solar Pond by Direct-Contact Heat Exchange

1982 ◽  
Vol 104 (4) ◽  
pp. 286-292 ◽  
Author(s):  
J. D. Wright
Keyword(s):  
Heat Exchange ◽  
Direct Contact ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Working Fluid ◽  
Contact Heat ◽  
Solar Pond ◽  
Contact Heat Exchange ◽  
Salt Gradient ◽  
Fluid Losses

An analysis was conducted of power production by an organic Rankine cycle engine coupled to a solar pond with direct-contact heat exchange. Use of a direct-contact boiler reduced the projected plant cost by 25 percent. The choice of a working fluid affects plant efficiency, turbine size, and working fluid losses. Pentane was shown to be the working fluid best suited to this application.

Optimization of an Organic Rankine Cycle-Based Waste Heat Recovery System Using a Novel Target-Temperature-Line Approach

2021 ◽  
Vol 143 (9) ◽  
Author(s):  
Md. Zahurul Haq
Keyword(s):  
Heat Exchange ◽  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Waste Heat ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Optimum Operating ◽  
Working Fluid ◽  
Operating Parameters ◽  
Target Temperature

Abstract Organic Rankine cycle (ORC)-based waste heat recovery (WHR) systems are simple, flexible, economical, and environment-friendly. Many working fluids and cycle configurations are available for WHR systems, and the diversity of working fluid properties complicates the synergistic integration of the efficient heat exchange in the evaporator and net output work. Unique guidelines to select a proper working fluid, cycle configuration and optimum operating parameters are not readily available. In the present study, a simple target-temperature-line approach is introduced to get the optimum operating parameters for the subcritical ORC system. The target-line is the locus of temperatures satisfying the pinch-point temperature difference along the length of the heat exchanger. Employing the approach, study is carried out with 38 pre-selected working fluids to get the optimum operating parameters and suitable fluid for heat source temperatures ranging from 100 °C to 300 °C. Results obtained are analyzed to get cross-correlations between key operating and performance parameters using a heat-map diagram. At the optimum condition, optimal working fluid’s critical temperature and pressure, evaporator saturation temperature, effectivenesses of the heat exchange in the evaporator, cycle, and overall WHR system exhibit strong linear correlations with the heat source temperature.

MILK CONCENTRATION BY DIRECT CONTACT HEAT EXCHANGE

1986 ◽  
Vol 9 (1) ◽  
pp. 63-79 ◽  
Author(s):  
A. H. ZAIDA ◽  
S. C. SARMA ◽  
P. D. GROVER ◽  
D. R. HELDMAN
Keyword(s):  
Heat Exchange ◽  
Direct Contact ◽  
Contact Heat ◽  
Contact Heat Exchange

Direct-contact heat exchange, shale production, and slag processing as examples of new efficient technologies for power generation

Energy ◽  
1987 ◽  
Vol 12 (10-11) ◽  
pp. 1097-1105
Author(s):  
R.B. Akhmedov ◽  
Z.L. Miropolsky ◽  
E.V. Samuilov ◽  
G.P. Stelmakh
Keyword(s):  
Power Generation ◽  
Heat Exchange ◽  
Direct Contact ◽  
Contact Heat ◽  
Contact Heat Exchange ◽  
Slag Processing
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