Abstract
In this study, the form and operation modes of a novel solar-driven cogeneration system consisted of various solar collectors (flat plat collectors (FPC), evacuated tube collectors (ETC), and parabolic trough collectors (PTC)) and ORC (organic Rankine cycle) based on building heating load are analyzed. This paper mainly obtains the fitting formula of thermal efficiency of the ORC power generation device and determines the form and operation mode of the cogeneration system. The form is the same, but the operation modes are different for PTC and FPC or ETC. There are six operating modes, respectively, based on the size relationship between the heating load of buildings and the effective heat collection of the solar collector subsystem when the solar collectors are PTC or FPC and ETC.
Highlights
Solar energy is a reliable energy, and the solar water heating system is one of the applications of solar energy which has drawn a great attention in this field
The form of the cogeneration system is the same for different types of the solar collectors, the operation modes are different for parabolic trough collector (PTC) and flat plat collectors (FPC) or evacuated tube collectors (ETC)
This paper mainly analyzes the form and the operation mode of the solar-driven cogeneration system consisting of solar collectors (PTC, FPC, and ETC) and Organic Rankine cycle (ORC) based on the building heating load
Summary
Solar energy is a reliable energy, and the solar water heating system is one of the applications of solar energy which has drawn a great attention in this field. Bellos and Tzivanidis [10] investigated a solar-driven trigeneration system using the parabolic trough collectors, an ORC, and an absorption heat pump operating with the LiBr-H2O working pair They studied eight different working fluids and six extra design parameters and found that toluene is the working fluid which leads to maximum exergetic output with n-octane and MDM to follow with 29.42%, 28.50%, and 28.35%, respectively. The overall power generation efficiency was 4.2% when the solar collectors were the evacuated tube collectors (ETC), while it was 3.2% under the condition of flat plat collectors (FPC) He et al [16] built a model for a typical thermal power generation system with the PTC and ORC within the transient energy simulation package TRNSYS and found that pentane had the best performance among three organic working fluids, R113, R123, and pentane. This paper mainly discusses the form and operation mode of the solar-driven cogeneration system with various collector types
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