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Design and Analysis of CSP Trough-Plant

Principle of Operation of CSP Trough-Plant

Candidates are advised to refer to relevant literature [2] and class/lecture material to focus of the module aims being explored [11], ergo the Learning outcomes identified on the title page of this document. It is the purpose of the final submitted report to demonstrate what learning has taken place throughout to assessment process and what module learning outcomes have been achieved [12]. 1. Use the Engineering Equation Solver (EES) or otherwise to design and analyse the CSP trough-plant a detailed in the references [2], using water as a working fluid. Here a boiler is supplied heat from the solar collector field and plant rejects heat to a temperature reservoir. Fluid is then extracted from a high pressure turbine with a faction of this used to feed the Closed Feed-Water Heater (CFWH). The remaining fluid is passed though a lower temperature turbine which is then subsequently reheated using heat transferred from the collector array, then expanded through a third turbine. A fraction of the exhaust fluid is then directed to an Open Feed-Water Heater (OFWH), with the remainder passing through the final low pressure turbine and then condensed. Saturated fluid leaving the condenser is pumped to the Open Feed-Water Heater (OFWH). The liquid is pulled from the OFWH and pumped up to the CFWH. The flow through the CFWH being controlled so that the extracted fluid leaving is a saturated liquid. With a third pump being exploited to ensure isobaric conditions in a mixing chamber. The pinch points for both of these heat exchangers occur at their warm end. (a) Describe the principle of operation the CSP trough-plant detailed in the reference [2]pp414 and compare and contrast this with the alternative shown in Figure 1[3]. Discuss the capital and operational costs when compared with an equivalent nuclear power plant. {10 marks} 2 Accessed: 05/08/2019. 3 (b) Use salient values evident in the literature [2]pp414 for each of the cogent device isentropic efficiencies and heat- exchanger approach temperatures throughout your model. Utilize a standard procedure [2]pp415 to facilitate each of the turbines and another procedure [2]pp41 for each of the pumps in the system, thereby evaluate salient plant operational paramters {20 marks}. (Task 1 total: 30 marks) 2. Hence critically evaluate the alternative design suggested by Ekremet [3] as shown in Figure 1(b). (a) Produce the pressure-volume, entropy-temperature and Mollier diagrams for each of cycles. {25 marks} (b) Find three plant design criteria. {10 marks} (c) Assuming that all of the radiation is absorbed by the collector pipe. For each of the designs (Figure 1) Determine the total rate of solar energy incident on the solar-trough field for a sensible collector size, obtaining an appropriate solar flux value from literature [2]pp424 {5 marks} (Task 2 total: 40 marks) 3. Use LyX3, LATEX(or otherwise) to produce a report detailing most important findings from your modelling work. It is suggested that the final submitted document pays attention to the following details. (a) Introduction and scope {4 marks} • Principle of operation and costing analysis, e.g. Task 1 part(a) • Scope: How are the Learning Outcomes to be demonstrated? (b) Methods {5 marks} • Definitions, including the standard Rankine cycle. • Justification of assumptions e.g. isentropic efficiency, approach temperatures, etc. • Benchmarking: Turbine and pump procedure

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