energyeffrefrige - JULY/AUGUST 2005 SERIES 3 MODULE 04 The...

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This EiBI CPD module is sponsored by: SERIES JULY/AUGUST 2005 SERIES 3 MODULE 04 ENERGY EFFICIENCY IN REFRIGERATION SYSTEMS CURRENT THINKING ON. .. The Continuing Professional Development programme Refrigeration and air conditioning costs are reported to amount for around 11 per cent of the UK total energy produced1. This is estimated to cost users around £350m per year. Furthermore, the majority of refrigeration systems are powered by electricity and so the environmental impact of producing this amount of cooling is both inefficient and damaging to the environment. This article examines the energy issues surrounding refrigeration systems, and their design and operation. It specifically deals with electric-powered vapour compression systems, although many of the principles are also applicable to other types of system. System Design Designing an efficient system can lead to significant savings. As with most electric, motor-operated machinery, the running costs over a lifetime can be far greater than the initial purchasing costs. It is estimated that a refrigeration system will cost more than six times to run than it will to purchase. Clearly, the life cycle costs of running such plant should be considered when designing a system. By considering energy efficiency at the design stage it is not unreasonable to recognise lower running costs of between 20-50 per cent to provide the same amount of cooling. There are other benefits to consider by designing an energy-efficient system such as: • IMPROVED RELIABILITY; • LOWER MAINTENANCE COSTS; • LONGER LIFETIME. The key areas in designing an energy efficient refrigeration system are summarised here and discussed in more detail within this article • SYSTEM CHARACTERISTICS; FUNDAMENTAL SERIES JULY/AUGUST 2005 By Carl Peat, Clouds Environmental Consultancy Ltd WELCOME Energy in Buildings and Industry and the Energy Institute are delighted to have teamed up to bring you this Continuing Professional Development initiative aimed at energy managers. This is the fourth module in the third series and focuses on the latest thinking in refrigeration. It is accompanied by a set of multiple-choice questions. To qualify for a CPD certificate readers must submit at least eight of the ten sets of questions from this series of modules to for the Energy Institute to mark. Anyone achieving at least eight out of ten correct answers on eight separate articles qualifies for an Energy Institute CPD certificate . This can be obtained, on successful completion of the course, for a fee of £15 (for members) or £25 (for non-members). The articles, written by a qualified member of the Energy Institute, will appeal to those new to energy management and those with more experience. The following topics will appear in the next six issues of EiBI: recent legislation; integrated renewables; fuel cells; the building envelope; water management; and lighting. If you miss any of the modules in the series (the first
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energyeffrefrige - JULY/AUGUST 2005 SERIES 3 MODULE 04 The...

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