Proceedings of the
5th International Seminar on
ORC Power Systems
9 - 11 September 2019, Athens Greece
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Experimental Investigation on Start-up Performance of a 315kW Organic Rankine Cycle System


Go-down orc2019 Tracking Number 51

Presentation:
Session: Session 2C: Experimental prototypes (1)
Room: Templar's
Session start: 14:00 Mon 09 Sep 2019

Puyao Wang   wangpuyao703@163.com
Affifliation: 703 Research Institute of China Shipbuilding Industry Corporation, Harbin 150078, China

Zhe Wu   330249263@qq.com
Affifliation: 703 Research Institute of China Shipbuilding Industry Corporation, Harbin 150078, China

Long Chen   635533742@qq.com
Affifliation: 703 Research Institute of China Shipbuilding Industry Corporation, Harbin 150078, China

Qingyang Han   1073523684@qq.com
Affifliation: 703 Research Institute of China Shipbuilding Industry Corporation, Harbin 150078, China

Zhiwei Yuan   yzw@hrbgnp.com
Affifliation: 703 Research Institute of China Shipbuilding Industry Corporation, Harbin 150078, China


Topics: - Experimental activities and techniques (Topics), - Operational Experience on Prototypes (Topics), - Oral Presentation (Preferred Presentation type)

Abstract:

The experimental study of a 315kW organic Rankine cycle (ORC) system using a radial-flow turbine, brazed plate heat exchangers (BHPE) and R134a has been investigated. An ORC system start-up mode of matching R134a flux with heat source temperature is introduced in this paper. In order to maintain the stable operation of each device of the ORC system, R134a flux should be gradually increased with the rise of the heat source temperature. Experiments were conducted for R134a flux ranging from 5.1kg/s to 19.0kg/s with the hot source temperature from 65℃ to 95℃, cold source temperature from 5.2℃ to 12.1℃.The effects of electrical power, turbine back pressure, heat exchangers pressure drop and exergy loss during the process of system start-up are examined. The experimental results show that the temperature of cold source and the R134a flux have great influence on the turbine back pressure, thus affecting the turbine output power. The lower the temperature of the cold source, the smaller the flux of R134a required for the generator to achieve the full power. Under the condition that the temperature of cold source is 5.2℃, the minimum R134a flux required for the electrical power to reach 315 kW is 17.7 kg/s, and the corresponding net power generation efficiency is 6.5%.