Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Design guide for solar cooling with double‐effect absorption chillers
The example in chapter 5 examines the potential for using high‐efficiency, multi‐effect absorption chillers, running at high temperatures (>150 °C). In principle, the high efficiency of the chiller offers the potential for (i) a smaller solar collector field size, (ii) reduced heat rejection and (iii) the option of using gas as a backup (without undue primary energy penalty). This may lead to more cost effective next generation solar cooling, particularly in large scale applications.
Modelling showed that concentrating collectors would be effective in climate zones where the direct component of annual solar radiation is greater than around 60%. In climates with more diffuse radiation, high temperature stationary collectors would need to be considered.
Realizing a cost‐effective and robust high‐temperature design can be challenging. An experimental system is described that employs thermal oil as a heat transfer medium, to enable atmospheric pressure operation across most of the system. The control strategy sources heat to the chiller from either 100% solar mode or 100% backup heater mode, in order to maximize solar gain. Robust operation of the system was achieved. However, the small size of the system made it difficult to prevent significant heat losses.
The chapter concludes with tips and improvements for maximizing technical performance and economic viability.
Design guide for solar cooling with double‐effect absorption chillers
The example in chapter 5 examines the potential for using high‐efficiency, multi‐effect absorption chillers, running at high temperatures (>150 °C). In principle, the high efficiency of the chiller offers the potential for (i) a smaller solar collector field size, (ii) reduced heat rejection and (iii) the option of using gas as a backup (without undue primary energy penalty). This may lead to more cost effective next generation solar cooling, particularly in large scale applications.
Modelling showed that concentrating collectors would be effective in climate zones where the direct component of annual solar radiation is greater than around 60%. In climates with more diffuse radiation, high temperature stationary collectors would need to be considered.
Realizing a cost‐effective and robust high‐temperature design can be challenging. An experimental system is described that employs thermal oil as a heat transfer medium, to enable atmospheric pressure operation across most of the system. The control strategy sources heat to the chiller from either 100% solar mode or 100% backup heater mode, in order to maximize solar gain. Robust operation of the system was achieved. However, the small size of the system made it difficult to prevent significant heat losses.
The chapter concludes with tips and improvements for maximizing technical performance and economic viability.
Design guide for solar cooling with double‐effect absorption chillers
Mugnier, Daniel (Autor:in) / Neyer, Daniel (Autor:in) / White, Stephen D. (Autor:in) / White, Stephen (Autor:in) / Sethuvenkatraman, Subbu (Autor:in) / Peristy, Mark (Autor:in) / Pintaldi, Sergio (Autor:in) / Goldsworthy, Mark (Autor:in) / Shirazi, Alec (Autor:in) / Taylor, Robert (Autor:in)
02.10.2017
40 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
| British Library Online Contents | 2017
| British Library Online Contents | 2017
Solar cooling plants: how to arrange solar collectors, absorption chillers and the load
| Oxford University Press | 2007
Installing Absorption Chillers
| British Library Online Contents | 2000