Exergoeconomic Analysis and Optimization of Solar Thermal Power Plants

Baghernejad, A.; Yaghoubi, Mahmood

doi:10.5772/29910

Cited by 2 publications

(2 citation statements)

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“…1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 11 The annual profit of the plant after FCR repayments, P ar , and with FCR repayments (e.g. loans), P wr , is determined from: (24) (25) To investigate the benefit of a hybrid plant in comparison to a biomass-only plant it is useful to determine the payback period for the additional investment in solar energy, PP sol , which is specified by the capital cost and profit of a hybrid plant for a given solar multiple (SM = m) and a biomass-only plant (SM = 0): (26) The payback period or breakeven time for the overall plant's capital cost, PP cap , is also included as it is a key indicator for investors of whether a project is financially feasible. Tax rates and other financial incentives such as carbon credits are not considered.…”

Section: 2mentioning

confidence: 99%

“…Such exergoeconomic analyses are typically used for design optimisation, assessing feasibility, and comparing system operating conditions and technologies, by evaluating the cost associated with the exergy loss in system components [24]. Rosen and Dincer [25] identified the correlation of total or internal exergy loss and capital cost leading to an overall optimum design for coal, oil and nuclear power stations.…”

Section: Introductionmentioning

confidence: 99%

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The feasibility of hybrid solar-biomass power plants in India

Nixon

Dey

Davies

2012

Energy

106

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We assess the feasibility of hybrid solar-biomass power plants for use in India in various applications including tri-generation, electricity generation and process heat. To cover this breadth of scenarios we analyse, with the help of simulation models, case studies with peak thermal capacities ranging from 2-10 MW. Evaluations are made against technical, financial and environmental criteria. Suitable solar multiples, based on the trade-offs among the various criteria, range from 1-2.5. Compared to conventional energy sources, levelised energy costs are high -but competitive in comparison to other renewables such as photovoltaic and wind. Long payback periods for hybrid plants mean that they cannot compete directly with biomass-only systems. However, a 1.2-3.2 times increase in feedstock price will result in hybrid systems becoming cost competitive. Furthermore, in comparison to biomass-only, hybrid operation saves up to 29% biomass and land with an 8.3-24.8 $/GJ/a and 1.8-5.2 ¢/kWh increase in cost per exergy loss and levelised energy cost. Hybrid plants will become an increasingly attractive option as the cost of solar thermal falls and feedstock, fossil fuel and land prices continue to rise. In the foreseeable future, solar will continue to rely on subsidies and it is recommended to subsidise preferentially tri-generation plants.Keywords: solar thermal; tri-generation; linear Fresnel reflector (LFR); energy policy; exergy. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 4 1. Introduction India receives a high level of Direct Normal Irradiance (DNI), 4-7 kWh/m 2 per day. Thus, there is a vast potential for decentralised solar energy applications using Concentrating Solar thermal Power (CSP). However, CSP technologies are currently expensive and the uptake in India has been slow. The Jawaharlal Nehru National Solar Mission was established in 2010 and outlined support for solar energy applications to encourage market penetration of gridconnected and decentralized off-grid applications, to provide energy services in India [1, 2]. One CSP technology of particular interest is the Linear Fresnel Reflector (LFR), due to its comparatively simple and inexpensive design. The LFR uses multiple rows of low profile mirrors to focus solar radiation onto a fixed target pipe to generate steam directly. Such Direct Steam Generation (DSG) is an alternative to the more commonly employed Heat Transfer Fluids (HTFs) -synthetic oil and molten salt -and has the potential to increase CSP plant efficiency and reduce costs [3]. However, thermal energy is difficult to store in DSG syste...

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Section: 2mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%