Journal
ENERGY SCIENCE & ENGINEERING
Volume 10, Issue 3, Pages 740-751Publisher
WILEY
DOI: 10.1002/ese3.1049
Keywords
cold energy utilization; LNG; operational parameters; ORC power generation; R290
Categories
Funding
- Science and Technology Commission of Shanghai Municipality [18040501800]
- National Natural Science Foundation of China [51706129, 51779136]
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This work presents an experimental investigation of a small-scale cryogenic Organic Rankine Cycle (ORC) power generation plant. The results show that increasing pressure drop and heat source temperature can improve system performance to some extent, with pressure drop exhibiting sensitivity to heat source temperature. The expander gross output power reaches its peak value when the heat source and heat sink are best matched.
This work presents an experimental investigation of a small-scale cryogenic Organic Rankine Cycle (ORC) power generation plant for cold energy utilization using scroll expander and R290. The fresh water and liquid nitrogen were used as heat source and heat sink, respectively. Furthermore, expander gross output power and isentropic efficiency, system thermal efficiency, and cold energy utilization efficiency were calculated as a principle to evaluate the overall system performance. The experimental results demonstrate that increasing pressure drop and heat source temperature will benefit the system performance in some extent, and the pressure drop exhibits a relative sensitivity to heat source temperature about the system performance. Moreover, the expander gross output power will get the peak value while the heat source and heat sink in the best matching. When the mass flow rate of liquid nitrogen at 120 kg/h, optimum pressure drop is 1.02 Mpa, and the corresponding expander gross output power, thermal efficiency, and cold energy utilization efficiency were 638.2W, 0.0586, and 0.0976, respectively. The optimum heat source temperature is 50celcius under liquid nitrogen mass flow rate of 120 kg/h, and the corresponding expander gross output power, thermal efficiency, and cold energy utilization efficiency were 674.2 W, 0.0594, and 0.099, respectively.
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