Cost-exergy optimisation of linear Fresnel reflectors

Nixon, Jonathan; Davies, Philip A.

doi:10.1016/j.solener.2011.09.024

Cited by 65 publications

(16 citation statements)

References 23 publications

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“…In LFR field, shading occurs when one reflector row blocks the incident rays falling on other reflector row (Nixon and Davies 2012). In addition, blocking occurs when the reflected rays from the reflectors are blocked by the other reflector rows and thus prevented from reaching the receiver of LFR system (Sharma et al 2015b).…”

Section: Linear Fresnel Reflectormentioning

confidence: 99%

Line-focusing concentrating solar collector-based power plants: a review

Desai

Bandyopadhyay

2016

Clean Techn Environ Policy

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Concentrated solar power (CSP) plant is an emerging technology among different renewable energy sources. Parabolic trough collector (PTC)-based CSP plant, using synthetic or organic oil as a heat-transfer fluid, is the most advanced technology. About 87 % of the operational capacities of CSP plants worldwide are based on PTC technology. Direct steam-generating linear Fresnel reflector (LFR) systems have been developed as a cost-effective alternative to PTC systems. Line-focusing concentrating solar collectors (PTC and LFR), with single-axis tracking, are simple in design and easy to operate. Prior to the detailed design of a CSP plant, it is necessary to finalize type of the solar field, type of the power-generating cycle, overall plant configuration, sizing of the solar field and the power block, etc. The optimal design of a CSP plant minimizes the levelized cost of energy for a given site. In this paper, a detailed review of important design parameters which affect the design of line-focusing concentrating solar collector-based power plants is presented. This includes parameters for solar collector field design, receiver, heat-transfer fluid, thermal energy storage, powergenerating cycle, sizing and configuration of the plant, etc. This review may provide a reference for designing CSP plants. Future research directions are also identified.

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Section: Linear Fresnel Reflectormentioning

confidence: 99%

Line-focusing concentrating solar collector-based power plants: a review

Desai

Bandyopadhyay

2016

Clean Techn Environ Policy

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“…The cavity receiver of a LFC consists of an absorber tube and a secondary concentrator. To make the Fresnel cavity profile an equations from the literature have been used [3]. To reduce heat loss the absorber is usually protected with a glass cover at the bottom of the cavity.…”

Section: Definition Of the Modelingmentioning

confidence: 99%

Thermal Analysis of a Receiver for Linear Fresnel Reflectors

et al. 2015

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This paper presents an advanced methodology for the detailed modeling of the heat transfer and dynamics phenomena in Linear Fresnel receivers. The present work aims at modeling Linear Fresnel receiver by proposing a parallel modular object-oriented methodology which considers the different elements of the receiver (e.g. Insulation material, glass cover, tube, pipe, etc.). The global model is composed of 4 sub models (heat conduction, two/single-phase flow, thermal radiation and natural convection) which are described. Results of the numerical model obtained so far are also presented and discussed.

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“…The hourly performance of the solar field is modelled based on the typical parameters for an LFR: Concentration ratio, C, Incident Angle Modifier, IAM, optical efficiency at normal incidence, η (θ=0) and heat loss coefficient, U L [46].…”

Section: 2mentioning

confidence: 99%

The feasibility of hybrid solar-biomass power plants in India

Nixon

Dey

Davies

2012

Energy

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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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Cost-exergy optimisation of linear Fresnel reflectors

Cited by 65 publications

References 23 publications

Line-focusing concentrating solar collector-based power plants: a review

Line-focusing concentrating solar collector-based power plants: a review

Thermal Analysis of a Receiver for Linear Fresnel Reflectors

The feasibility of hybrid solar-biomass power plants in India

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