Power generation from low enthalpy geothermal resources using Organic Rankine Cycle systems is markedly influenced by the temperature level of the heat source and heat sink. During plant operation the actual temperature of the geofluid may be different from the value assumed in the design phase. In addition, the seasonal and daily variations of the ambient temperature greatly affect the power output especially when a dry condensation system is used. This paper presents a detailed off-design model of an Organic Rankine Cycle that includes the performance curves of the main plant components. Two capacitive components in the model have the key function of damping the temporary disequilibrium of mass and energy inside the system. Isobutane and R134a are considered as working fluids, mainly operating in subcritical and supercritical cycles, respectively. The off-design model is used to find the optimal operating parameters that maximize the electricity production in response to changes of the ambient temperatures between 0 and 30 degrees C and geofluid temperatures between 130 and 180 degrees C. This optimal operation strategy can be conveniently applied both to already existing plants and to the choice of new design plant configurations. (C) 2013 Elsevier Ltd. All rights reserved.
机构:
Xi An Jiao Tong Univ, Inst Turbomachinery, Sch Energy & Power Engn, Xian 710049, Peoples R ChinaXi An Jiao Tong Univ, Inst Turbomachinery, Sch Energy & Power Engn, Xian 710049, Peoples R China
Hu, Dongshuai
Zheng, Ya
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Xi An Jiao Tong Univ, Inst Turbomachinery, Sch Energy & Power Engn, Xian 710049, Peoples R ChinaXi An Jiao Tong Univ, Inst Turbomachinery, Sch Energy & Power Engn, Xian 710049, Peoples R China
Zheng, Ya
Wu, Yi
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Xi An Jiao Tong Univ, Inst Turbomachinery, Sch Energy & Power Engn, Xian 710049, Peoples R ChinaXi An Jiao Tong Univ, Inst Turbomachinery, Sch Energy & Power Engn, Xian 710049, Peoples R China
Wu, Yi
Li, Saili
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Xi An Jiao Tong Univ, Inst Turbomachinery, Sch Energy & Power Engn, Xian 710049, Peoples R ChinaXi An Jiao Tong Univ, Inst Turbomachinery, Sch Energy & Power Engn, Xian 710049, Peoples R China
Li, Saili
Dai, Yiping
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Xi An Jiao Tong Univ, Inst Turbomachinery, Sch Energy & Power Engn, Xian 710049, Peoples R ChinaXi An Jiao Tong Univ, Inst Turbomachinery, Sch Energy & Power Engn, Xian 710049, Peoples R China
机构:
Tsinghua Univ, Dept Thermal Engn, Minist Educ, Key Lab Thermal Sci & Power Engn, Beijing 100084, Peoples R ChinaTsinghua Univ, Dept Thermal Engn, Minist Educ, Key Lab Thermal Sci & Power Engn, Beijing 100084, Peoples R China
Song, Jian
Gu, Chun-wei
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Tsinghua Univ, Dept Thermal Engn, Minist Educ, Key Lab Thermal Sci & Power Engn, Beijing 100084, Peoples R ChinaTsinghua Univ, Dept Thermal Engn, Minist Educ, Key Lab Thermal Sci & Power Engn, Beijing 100084, Peoples R China
Gu, Chun-wei
Ren, Xiaodong
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Hong Kong Univ Sci & Technol, Dept Math, Sch Sci, Hong Kong, Hong Kong, Peoples R ChinaTsinghua Univ, Dept Thermal Engn, Minist Educ, Key Lab Thermal Sci & Power Engn, Beijing 100084, Peoples R China
机构:
Fraunhofer Chile Res, Ctr Solar Energy Technol, Vicuna Mackenna 4860, Santiago, Chile
UNED, C Juan del Rosal 12, Madrid 28040, SpainFraunhofer Chile Res, Ctr Solar Energy Technol, Vicuna Mackenna 4860, Santiago, Chile
Ibarra, Mercedes
Rovira, Antonio
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UNED, C Juan del Rosal 12, Madrid 28040, SpainFraunhofer Chile Res, Ctr Solar Energy Technol, Vicuna Mackenna 4860, Santiago, Chile
Rovira, Antonio
Alarcon-Padilla, Diego-Cesar
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CIEMAT Plataforma Solar Almeria, Ctra Sends S-N, Tabernas 04200, Almeria, SpainFraunhofer Chile Res, Ctr Solar Energy Technol, Vicuna Mackenna 4860, Santiago, Chile
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Xi An Jiao Tong Univ, Sch Energy & Power Engn, Inst Turbomachinery, Xian 710049, Shaanxi, Peoples R ChinaXi An Jiao Tong Univ, Sch Energy & Power Engn, Inst Turbomachinery, Xian 710049, Shaanxi, Peoples R China
Gao, Tieyu
Liu, Changwei
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Xi An Jiao Tong Univ, Sch Energy & Power Engn, Inst Turbomachinery, Xian 710049, Shaanxi, Peoples R ChinaXi An Jiao Tong Univ, Sch Energy & Power Engn, Inst Turbomachinery, Xian 710049, Shaanxi, Peoples R China
机构:
Xi An Jiao Tong Univ, Inst Turbomachinery, Sch Energy & Power Engn, Xian 710049, Peoples R ChinaXi An Jiao Tong Univ, Inst Turbomachinery, Sch Energy & Power Engn, Xian 710049, Peoples R China
Hu, Dongshuai
Li, Saili
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Xi An Jiao Tong Univ, Inst Turbomachinery, Sch Energy & Power Engn, Xian 710049, Peoples R ChinaXi An Jiao Tong Univ, Inst Turbomachinery, Sch Energy & Power Engn, Xian 710049, Peoples R China
Li, Saili
Zheng, Ya
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Xi An Jiao Tong Univ, Inst Turbomachinery, Sch Energy & Power Engn, Xian 710049, Peoples R ChinaXi An Jiao Tong Univ, Inst Turbomachinery, Sch Energy & Power Engn, Xian 710049, Peoples R China
Zheng, Ya
Wang, Jiangfeng
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Xi An Jiao Tong Univ, Inst Turbomachinery, Sch Energy & Power Engn, Xian 710049, Peoples R ChinaXi An Jiao Tong Univ, Inst Turbomachinery, Sch Energy & Power Engn, Xian 710049, Peoples R China
Wang, Jiangfeng
Dai, Yiping
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Xi An Jiao Tong Univ, Inst Turbomachinery, Sch Energy & Power Engn, Xian 710049, Peoples R ChinaXi An Jiao Tong Univ, Inst Turbomachinery, Sch Energy & Power Engn, Xian 710049, Peoples R China
机构:
Xi An Jiao Tong Univ, Sch Energy & Power Engn, Inst Turbomachinery, Xian 710049, Peoples R ChinaXi An Jiao Tong Univ, Sch Energy & Power Engn, Inst Turbomachinery, Xian 710049, Peoples R China
Wang, Jiangfeng
Yan, Zhequan
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机构:
Georgia Inst Technol, George W Woodruff Sch Mech Engn, Atlanta, GA 30332 USAXi An Jiao Tong Univ, Sch Energy & Power Engn, Inst Turbomachinery, Xian 710049, Peoples R China
Yan, Zhequan
Zhao, Pan
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Xi An Jiao Tong Univ, Sch Energy & Power Engn, Inst Turbomachinery, Xian 710049, Peoples R ChinaXi An Jiao Tong Univ, Sch Energy & Power Engn, Inst Turbomachinery, Xian 710049, Peoples R China
Zhao, Pan
Dai, Yiping
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Xi An Jiao Tong Univ, Sch Energy & Power Engn, Inst Turbomachinery, Xian 710049, Peoples R ChinaXi An Jiao Tong Univ, Sch Energy & Power Engn, Inst Turbomachinery, Xian 710049, Peoples R China