Integration of a solar thermal system in a medium-sized brewery using pinch analysis: Methodology and case study

被引:46
作者
Eiholzer, Tobias [1 ]
Olsen, Donald [1 ]
Hoffmann, Sebastian [1 ]
Sturm, Barbara [2 ,3 ]
Wellig, Beat [1 ]
机构
[1] Lucerne Univ Appl Sci & Arts, Technikumstr 21, CH-6048 Horw, Switzerland
[2] Newcastle Univ, Sch Agr Food & Rural Dev, Agr Bldg, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England
[3] Univ Kassel, Dept Agr & Biosyst Engn, Postharvest Technol & Proc Grp, D-37213 Witzenhausen, Germany
关键词
Energy efficiency; Solar heat; Process integration; Pinch analysis; Batch process; ENERGY EFFICIENCY; FEASIBILITY; INDUSTRIES; EMISSIONS; SECTOR; WATER;
D O I
10.1016/j.applthermaleng.2016.09.124
中图分类号
O414.1 [热力学];
学科分类号
摘要
In the food industry a major portion of thermal energy is required for low temperature applications (below 100 degrees C). As a consequence, there is a significant potential to substitute fossil fuels by the use of solar heat. This paper presents a methodology that first uses pinch analysis to optimize a medium-sized Scottish brewery from a direct heat recovery perspective followed by the integration of a solar thermal system. Both the time average model and time slice model were used to determine direct and indirect heat recovery potentials. In a second stage, an optimization of a chosen integration point was conducted to assess the viability of the resulting design concept. The economic analysis includes an assessment of the impact of restrictions in the UK government's Renewable Heat Incentive program. It was determined that since solar thermal systems are financially supported up to an installed capacity of 200 kW, solar heat can only account for a maximum of 7.7% of the heat demand based on the investigated brewery. However, if there was no limitation in capacity, from an economic point of view, the solar fraction could almost be doubled drawing into question the need for the restriction. Nevertheless, a CO2 saving potential of approximately 38 tons per year in conjunction with a payback period of 6.4 years was determined. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码:1558 / 1568
页数:11
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