Energy and exergy assessment and a competitive study of a two-stage ORC for recovering SFGC waste heat and LNG cold energy

被引：40
作者：
Aryanfar, Yashar [1 ,2 ]
Mohtaram, Soheil [3 ]
Alcaraz, Jorge Luis Garcia [4 ]
Sun, HongGuang [1 ]
机构：
[1] Hohai Univ, Coll Mech & Mat, Int Ctr Simulat Software Engn & Sci, State Key Lab Hydrol Water Recourses & Hydraul Eng, Nanjing 210098, Jiangsu, Peoples R China
[2] Autonomous Univ Ciudad Juarez, Dept Elect Engn & Computat, Av Charro 450 Norte Col Partido Romero Juarez, Chihuahua, Mexico
[3] Univ Shanghai Sci & Technol, Sch Energy & Power Engn, Shanghai 200093, Peoples R China
[4] Autonomous Univ Ciudad Juarez, Dept Ind Engn & Mfg, Av Charro 450 Norte Col Partido Romero Juarez, Chihuahua, Mexico
来源：
ENERGY | 2023年 / 264卷
基金：
中国国家自然科学基金;
关键词：
Single flash geothermal cycle; LNG; ORC; Recovery; Working fluid; Net power; ORGANIC RANKINE-CYCLE; THERMOECONOMIC ANALYSIS; WORKING FLUIDS; PUMP SYSTEM; OPTIMIZATION; POWER; PERFORMANCE; HYDROGEN; PRESSURE; FLASH;
D O I：
10.1016/j.energy.2022.126191
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
In this paper, three functional modes of a new designed geothermal power plant are investigated, simulated, and analyzed. The single flash geothermal cycle (SFGC) is the first mode. The second mode is a SFGC with two-stage ORC recovery, and the third mode is an SFGC with two-stage ORC recovery and LNG cryogenic energy. Adding a two-stage ORC recovery and LNG refrigeration exergy cycle aims to improve the thermal efficiency and exergy efficiency of the basic SFGC system as well as use LNG's cold energy prior to entering urban consumption networks. For the two-stage recovery cycle, the ORC's working fluids also included R227ea/R116 and R124/ R125. In order to analyze the proposed system, the equations of the first law and the second law of thermo-dynamics are used. Assuming a two-stage ORC and LNG recovery mode, the energy efficiency of the SFGC will increase from 0.2023 to 0.3863 when using R227ea and R116 working fluids, and from 0.4016 to 0.4066 when using R124 and R125 working fluids.
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页数：18
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