An Overview on Application of Exergy and Energy for Determination of Solar Drying Efficiency

Bennamoun, Lyes

doi:10.5923/j.ijee.20120205.01

Cited by 39 publications

(16 citation statements)

References 61 publications

(76 reference statements)

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“…3 (b)). Solar drying case studies have been reviewed by Panwar et al (2012) and mathematical models for thin or thick layer solar drying have been discussed by Bennamoun (2012). El-Sebaii and Shalaby (2012) described the different types of solar dryers used in the drying of agricultural products.…”

Section: Applications Of Exergy Analysis In the Food Industrymentioning

confidence: 99%

The use of exergetic indicators in the food industry – A review

Zisopoulos

Rossier-Miranda²,

Goot

et al. 2015

Critical Reviews in Food Science and Nutrition

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Assessment of sustainability will become more relevant for the food industry in the years to come. Analysis based on exergy, including the use of exergetic indicators and Grassmann diagrams, is a useful tool for the quantitative and qualitative assessment of the efficiency of industrial food chains. In this paper, we review the methodology of exergy analysis and the exergetic indicators that are most appropriate for use in the food industry. The challenges of applying exergy analysis in industrial food chains and the specific features of food processes are also discussed.

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Section: Applications Of Exergy Analysis In the Food Industrymentioning

confidence: 99%

The use of exergetic indicators in the food industry – A review

Zisopoulos

Rossier-Miranda²,

Goot

et al. 2015

Critical Reviews in Food Science and Nutrition

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“…Solar air collectors are simple devices, however have a numerous of options of constructive execution, warming, a material and a covering of an absorber, a translucent covering, and means of ensuring creation of turbulent air streams inside. Therefore, a large number of scientific studies of various authors is devoted to the study of their properties and design features [8][9][10][11][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Optimization of air chamber in solar air collector

et al. 2020

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Recently, environmental problems have become more acute. In 1980, the International Union for the Conservation of Nature (IUCN) prepared the World Conservation Strategy. This document interpreted the term "sustainable development" as an inseparable link between social development and nature conservation. And already in 1992, after the United Nations Conference on Environment and Development, the concept of sustainable development gained a leading status. The conference materials determined that sustainable development is a development of a society that meets the needs of today without compromising the ability of future generations to meet their own needs. Therefore, being aware of the need for energy conservation, there is increasing emphasis on the use of solar energy throughout the world to generate electricity and heat.

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“…Energy analysis applies the principle of energy conservation, that is, first law of thermodynamics; whereas exergy analysis considers the availability of energy at different points in the system. Exergy is defined as the maximum amount of work which can be produced by a quantity or stream of matter, heat or work as it comes to equilibrium with a reference environment [14].…”

Section: Introductionmentioning

confidence: 99%

Performance of hybrid photovoltaic/thermal crop dryer in hot humid Nigerian region

Uzoma¹,

Nwakuba²,

Anyaoha³

2019

Poljoprivredna tehnika

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This paper presents a study carried out to investigate the performance of a hybrid photovoltaic/thermal crop dryer in hot humid region of Umuagwo-Ohaji in the Southeast region of Nigeria, through energy and exergy analyses, drying, electrical and thermal efficiencies, energy utilization and energy utilization ratio, sustainability indicators such as waste energy ratio (WER), sustainability index (SI) and improvement potential (IP). Drying experiments were conducted at varying inlet air temperatures (50, 60 and 70 o C), airflow rates (1.14, 2.29 and 3.43 kgs-1) and slice thicknesses (10, 15 and 20 mm) on 500g batch size of red pepper slices during sunshine periods. Results obtained show that the total and specific energy consumption for drying a batch of sliced red pepper samples varied between 2.08-34.91kJ and 7.04-62.76 kJkg-1 , respectively. The energy utilization and energy utilization ratio during the drying process ranged from 195.75-3013.21 Js-1 and 1.82-20.4%, respectively. The energy and exergy efficiencies varied between 15.67-38.17% and 26% to 88%, respectively. The mean drying efficiency of the system ranged from 7.12-40.27%. The maximum electrical and thermal efficiencies of 23.86% and 93.03%, respectively were obtained. A waste energy ratio of 0.0827-0.1579 was obtained, whereas SI and IP values ranged between 1.137 ≤ SI ≤ 6.119 and 0.198 ≤ IP ≤0.583kW, respectively. There is certainly a wide range of improvement in the PV/T system as 12.1-18.4 % of the solar irradiance was consumed for drying. Prospects for improvement and recommendations for further studies were suggested.

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An Overview on Application of Exergy and Energy for Determination of Solar Drying Efficiency

Cited by 39 publications

References 61 publications

The use of exergetic indicators in the food industry – A review

The use of exergetic indicators in the food industry – A review

Optimization of air chamber in solar air collector

Performance of hybrid photovoltaic/thermal crop dryer in hot humid Nigerian region

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