Analysis of a combined power and refrigeration cycle by the exergy method

Vidal, Aloyem Kazé Claude; Best, R.; Rivero, Ricardo; Cervantes, J.

doi:10.1016/j.energy.2006.03.001

Cited by 130 publications

(45 citation statements)

References 16 publications

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“…cooling effect and electrical generation. (20) ( 21) where the Fixed Charge Rate (FCR) can be determined by the real debt interest, k d , over an n number of years. (22) In this study an FCR is determined from the rate of return to repay the capital cost of the plant over a 20 year period (e.g.…”

Section: 2mentioning

confidence: 99%

“…Bhattacharya et al [19] performed an energy and exergy analysis of a hybrid gas-biomass system, and determined the optimum degree of supplementary firing to maximise exergetic efficiencies and the major sources of exergy losses in the cycle. Vidal et al [20] established the exergy loss in each component of a combined power and refrigeration cycle, finding the highest irreversibilities to occur in the heat exchanger. Singh et al [21] performed an exergy analysis of a solar thermal power station finding the maximum energy loss to occur at the condenser, while the exergy analysis determined that the maximum losses occurred in the solar thermal field.…”

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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%

mentioning

confidence: 99%

The feasibility of hybrid solar-biomass power plants in India

Nixon

Dey

Davies

2012

Energy

106

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“…Secondly, some energetic simulation results of the developed models are compared with the design values of the power plants in order to demonstrate the reliability. Thirdly, design point performance analyses based on energetic and exergetic performance criteria such as thermal efficiency, exergy efficiency, exergy loss, exergetic performance coefficient are performed for all considered plants in order to make comprehensive evaluations Vidal et al [15] analysis exergy method was applied in order to evaluate the new combined cycle proposed by Goswami, using Hasan-Goswami-Vijayaraghavan parameters. This new combined cycle was proposed to produce both power and cooling simultaneously with only one heat source and using ammonia-water mixture as the working fluid.…”

Section: Coal Fired Thermal Power Plantsmentioning

confidence: 99%

An Approach to Analyse Energy and Exergy Analysis of Thermal Power Plants: A Review

Reddy¹,

Kaushik²,

Tyagi³

et al. 2010

SGRE

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“…Some of these new cycles are designed to operate with medium or low temperature heat sources, and theoretical investigations have demonstrated their potentials [2]. One of their characteristics is the use of a binary mixture as the working fluid, so as to increase thermal efficiency [3].…”

Section: Introductionmentioning

confidence: 99%

Energy and Exergy Analyses of a New Combined Cycle for Producing Electricity and Desalinated Water Using Geothermal Energy

et al. 2014

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Abstract:A new combined cogeneration system for producing electrical power and pure water is proposed and analyzed from the viewpoints of thermodynamics and economics. The system uses geothermal energy as a heat source and consists of a Kalina cycle, a LiBr/H 2 O heat transformer and a water purification system. A parametric study is carried out in order to investigate the effects on system performance of the turbine inlet pressure and the evaporator exit temperature. For the proposed system, the first and second law efficiencies are found to be in the ranges of 16%-18.2% and 61.9%-69.1%, respectively. For a geothermal water stream with a mass flow rate of 89 kg/s and a temperature of 124 °C, the maximum production rate for pure water is found to be 0.367 kg/s.

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Analysis of a combined power and refrigeration cycle by the exergy method

Cited by 130 publications

References 16 publications

The feasibility of hybrid solar-biomass power plants in India

The feasibility of hybrid solar-biomass power plants in India

An Approach to Analyse Energy and Exergy Analysis of Thermal Power Plants: A Review

Energy and Exergy Analyses of a New Combined Cycle for Producing Electricity and Desalinated Water Using Geothermal Energy

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