Opportunities for low-grade heat recovery in the UK food processing industry
Opportunities for low-grade heat recovery in the UK food processing industry
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DOI：
10.1016/j.applthermaleng.2012.03.024
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发表时间：
2013-05
影响因子：
6.4
通讯作者：
R. Law;A. Harvey;D. Reay
中科院分区：
文献类型：
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作者：
R. Law;A. Harvey;D. Reay
由于电力和化石燃料资源的成本不断上升，以及2008年气候变化法案中概述的温室气体减排的坚韧目标，过程工业的能源效率正在成为一个日益重要的问题。废热源的利用是提高工业能源效率的关键，据估计，每年有11.4太瓦时的可回收热量被浪费，其中四分之一来自食品和饮料加工行业。本文探讨了食品和饮料加工行业常见的低品位废热源以及利用这种热量的各种机会。本报告审查了回收废热的现有最佳技术，从热源和散热器之间的传热到发电和制冷的新技术。通常，废热回收的最经济的选择是在附近/相同的工艺源和汇之间进行热交换，其中许多开发良好的热交换器可广泛购买。更新颖的选择，如使用有机朗肯循环发电证明是不太经济的，由于高资本支出。然而，如果为这些项目的示范和模块单元的开发提供额外资金，这些技术将变得更加普遍。
Energy efficiency in the process industry is becoming an increasingly important issue due to the rising costs of both electricity and fossil fuel resources, as well as the tough targets for the reduction in greenhouse gas emissions outlined in the Climate Change Act 2008. Utilisation of waste heat sources is key to improving industrial energy efficiency, with an estimated 11.4 TWh of recoverable heat being wasted each year, a quarter of which is from the food and drinks processing sector. This paper examines the low-grade waste heat sources common to the food and drinks processing sector and the various opportunities for the use of this heat. A review of the best available technologies for recovery of waste heat is provided, ranging from heat transfer between source and sink, to novel technologies for the generation of electricity and refrigeration. Generally, the most economic option for waste heat recovery is heat exchange between nearby/same process source and sink, with a number of well-developed heat exchangers widely available for purchase. More novel options, such as the use of organic Rankine cycles for electricity generation prove to be less economical due to high capital outlays. However, with additional funding provision for demonstration of such projects and development of modular units, such technologies would become more common.