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The potential application of residential solar thermal cooling in the UK and the role of thermal energy storage technologies

机译:英国住宅太阳能热制冷的潜在应用以及热能存储技术的作用

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As the UK Building Regulations demand better insulated and more airtight new buildings, a potential cooling requirement is emerging in new build dwellings in the UK. leading to an increase in the market for domestic air conditioning systems in this country. At the same time, current strategies at a European and National level are starting to focus on the use of renewable and low carbon energy sources, aiming at energy security and reduction of carbon emissions. Solar thermal cooling in small scale residential applications is of particular interest due to the major electrical energy supply problems experienced in many countries related to the demand for cooling in summer. Only recently have such small scale systems become commercially available and it is still a relatively expensive technology. The performance of these systems depends strongly on the local climate, the COP of the cooling system and the holistic design of the plant and buildings. Either absorption refrigeration or desiccant cooling can be used in solar cooling applications. Solar cooling is normally designed to cover a certain percentage of the demand (30%-60%) and an auxiliary fossil fuelled system is therefore required to drive the Thermally Activated Cooling Systems (TACS) the periods when there is insufficient solar energy. This paper explores the potential cooling demand in a dwelling in the UK and the use of Thermal Energy Storage (TES) systems to increase the solar fraction available. The paper uses the ECOTECT (see Ecotect) building modelling software to model a particular dwelling, drawn from generic regional UK housing stock information (Rhodes et al., 2007) as a Case Study to illustrate the paper's aims. A scenario to simulate realistic hourly patterns of occupancy and internal gains due to appliances and lighting is described. The cooling requirement and the collector area required to meet this demand are calculated. The role of the TES in relation to the solar fraction of the system is investigated. The limitations of the software used for this simulation are also discussed along with the reliability of the results.
机译:由于英国《建筑法规》要求更好的隔热性和气密性的新建筑,因此英国新建住宅中出现了潜在的制冷要求。导致该国家用空调系统市场的增长。同时,欧洲和国家层面的当前策略开始集中于使用可再生和低碳能源,旨在实现能源安全和减少碳排放。由于许多国家/地区在夏季遇到与制冷需求有关的主要电能供应问题,因此特别关注小型住宅应用中的太阳能热制冷。直到现在,这种小型系统才可商业获得,并且它仍然是一种相对昂贵的技术。这些系统的性能在很大程度上取决于当地的气候,冷却系统的COP以及工厂和建筑物的整体设计。吸收制冷或干燥剂冷却都可以用于太阳能冷却应用中。通常将太阳能冷却设计为可满足一定比例的需求(30%-60%),因此需要辅助化石燃料系统来驱动热活化冷却系统(TACS),该阶段需要的太阳能不足。本文探讨了英国一所住宅的潜在制冷需求,以及使用热能存储(TES)系统来增加可用太阳能的比例。本文以案例研究为例,使用ECOTECT(请参阅Ecotect)建筑建模软件对特定住宅进行建模,该案例借鉴了英国通用区域住房存货信息(Rhodes等,2007)。描述了模拟由于设备和照明而造成的实际占用率和内部收益的小时模式的场景。计算出满足该需求所需的冷却要求和集热面积。研究了TES与系统中太阳能比例的关系。还讨论了用于此仿真的软件的局限性以及结果的可靠性。

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