Exergoeconomic comparison of TLC (trilateral Rankine cycle), ORC (organic Rankine cycle) and Kalina cycle using a low grade heat source

Energy ◽  
2015 ◽  
Vol 83 ◽  
pp. 712-722 ◽  
Author(s):  
M. Yari ◽  
A.S. Mehr ◽  
V. Zare ◽  
S.M.S. Mahmoudi ◽  
M.A. Rosen
Keyword(s):  
Heat Source ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Low Grade ◽  
Kalina Cycle ◽  
Low Grade Heat

Investigations on experimental performance and system behavior of 10 kW organic Rankine cycle using scroll-type expander for low-grade heat source

Energy ◽  
2019 ◽  
Vol 177 ◽  
pp. 94-105 ◽  
Author(s):  
Chih-Hung Lin ◽  
Pei-Pei Hsu ◽  
Ya-Ling He ◽  
Yong Shuai ◽  
Tzu-Chen Hung ◽  
...  
Keyword(s):  
Heat Source ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Low Grade ◽  
System Behavior ◽  
Experimental Performance ◽  
Low Grade Heat

Working Fluid and Parametric Optimization of a Two-Stage ORC Utilizing LNG Cold Energy and Low Grade Heat of Different Temperatures

2017 ◽  
Author(s):  
Zhixin Sun ◽  
Shujia Wang ◽  
Fuquan Xu ◽  
Tielong Wang
Keyword(s):  
Heat Source ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Cycle Performance ◽  
Maximum Efficiency ◽  
Working Fluid ◽  
Low Grade ◽  
Two Stage ◽  
Cold Energy ◽  
Low Grade Heat

Natural gas is considered as a green fuel due to its low environmental impact. LNG contains a large amount of cold exergy and must be regasified before further utilization. ORC (Organic Rankine Cycle) has been proven to be a promising solution for both low grade heat utilization and LNG cold exergy recovery. Due to the great temperature difference between the heat source and LNG, the efficiency of one-stage ORC is relatively small. Hence, some researchers move forward to a two-stage Rankine cycle. Working fluid plays a quite important role in the cycle performance. Working fluid selection of a two-stage ORC is much more challenging than that of a single-stage ORC. In this paper, a two-stage ORC is studied. Heat source temperatures of 100,150 and 200°C are investigated. 20 substances are selected as potential candidates for both the high and low Rankine cycles. The evaporating, condensing and turbine inlet temperatures of both Rankine cycles are optimized by PSO (Particle Swarm Optimization). The results show that the best combination for heat source temperature of 100°C is R161/R218 with the maximum exergy efficiency of 35.27%. The best combination for 150°C is R161/RC318 with the maximum efficiency of 37.84% and ammonia/ammonia with the maximum efficiency of 39.15% for 200°C. Fluids with intermediate critical temperature, lower triple point temperature and lower normal boiling temperature are good candidates.

scholarly journals Testing of Low-grade Heat Source Organic Rankine Cycle with Small Hot Vapor Reciprocating Engine

2015 ◽  
Vol 79 ◽  
pp. 335-340 ◽  
Author(s):  
Wasun Darawun ◽  
Roongrojana Songprakorp ◽  
Veerapol Monyakul ◽  
Sirichai Thepa
Keyword(s):  
Heat Source ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Low Grade ◽  
Reciprocating Engine ◽  
Low Grade Heat

Thermodynamic analysis and optimization of an (organic Rankine cycle) ORC using low grade heat source

Energy ◽  
2013 ◽  
Vol 49 ◽  
pp. 356-365 ◽  
Author(s):  
Jiangfeng Wang ◽  
Zhequan Yan ◽  
Man Wang ◽  
Shaolin Ma ◽  
Yiping Dai
Keyword(s):  
Heat Source ◽  
Thermodynamic Analysis ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Low Grade ◽  
Low Grade Heat

Meanline Analysis and CFD Study of a Radial Inflow Turbine With Vaneless Distributor for Low Temperature Organic Rankine Cycle

2020 ◽  
Author(s):  
M. Deligant ◽  
S. Braccio ◽  
T. Capurso ◽  
F. Fornarelli ◽  
M. Torresi ◽  
...  
Keyword(s):  
Energy Demand ◽  
Waste Heat ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Operating Conditions ◽  
Low Grade ◽  
Heat Sources ◽  
Turbine Wheel ◽  
Good Efficiency ◽  
Low Grade Heat

Abstract The Organic Rankine Cycle (ORC) allows the conversion of low-grade heat sources into electricity. Although this technology is not new, the increase in energy demand and the need to reduce CO2 emissions create new opportunities to harvest low grade heat sources such as waste heat. Radial turbines have a simple construction, they are robust and they are not very sensitive to geometry inaccuracies. Most of the radial inflow turbines used for ORC application feature a vaned nozzle ensuring the appropriate distribution angle at the rotor inlet. In this work, no nozzle is considered but only the vaneless gap (distributor). This configuration, without any vaned nozzle, is supposed to be more flexible under varying operating conditions with respect to fixed vanes and to maintain a good efficiency at off-design. This paper presents a performance analysis carried out by means of two approaches: a combination of meanline loss models enhanced with real gas fluid properties and 3D CFD computations, taking into account the entire turbomachine including the scroll housing, the vaneless gap, the turbine wheel and the axial discharge pipe. A detailed analysis of the flow field through the turbomachine is carried out, both under design and off design conditions, with a particular focus on the entropy field in order to evaluate the loss distribution between the scroll housing, the vaneless gap and the turbine wheel.

Assessment of off-design performance of a Kalina cycle driven by low-grade heat source

Energy ◽  
2017 ◽  
Vol 138 ◽  
pp. 459-472 ◽  
Author(s):  
Jianyong Wang ◽  
Jiangfeng Wang ◽  
Yiping Dai ◽  
Pan Zhao
Keyword(s):  
Heat Source ◽  
Low Grade ◽  
Kalina Cycle ◽  
Design Performance ◽  
Low Grade Heat
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