Design of Heat Storage for a Solar Concentrator Driving an Absorption Chiller

The feasibility of employing stand-alone solar energy systems to meet demand-side loads depends strongly on providing appropriate solar energy storage. The present paper presents an efficient and economical, underground, thermal storage design to store hot water at a temperature of around 180?C required for running a double effect absorption chiller to cool a zero-energy-house in a desert environment. The performance of the design is evaluated employing a specially developed efficient mathematical model, for simulating the steady state radiation, convection and conduction processes occurring within the storage unit. The model is presented and analyzed, and employed to investigate the effects of various design parameters on storage efficiency. It is demonstrated that high storage efficiency may be reached, providing that appropriate insulation materials are used. It is also revealed that the soil conductivity has little effect on storage efficiency.

新能源利用综合演示实验平台研制

研制了一个新能源利用综合演示实验平台,该综合演示实验平台共包括7个新能源转化利用的子系统,分为光电转换、风电转换、光热转换三类,每个子系统设计了能量转换、能量传输、运行控制、能量利用及人机交互等部件。利用自行开发的数据采集板采集数据,用MCGS组态软件设计人机交互界面,通过JACE网络控制器将各个子系统进行集成,并利用先进的Niagara框架平台对整个平台系统进行访问控制。实践证明,该综合演示实验平台可以很好地演示新能源转化利用的过程及原理,达到了教学及科研的目的。

太阳能空调热水一体机供暖兼制热水模式的性能研究

通过研究太阳能空调热水一体机随太阳辐射强度和环境温度等因素对其制热水工况下能源利用率的影响效果,并加以试验验证和推理,得出太阳能空调热水一体机供暖的同时制热水的控制策略,使其机组供暖兼制热水模式下的整机能源利用率得到最大的提升。