一种新型多功能一体化太阳能利用系统研究

Research on a Novel Multifunctional Integrated Solar Energy Utilization System

针对轻钢装配式建筑中太阳能技术应用的研究不足,提出一种新型多功能一体化太阳能利用系统.为深入分析系统性能,根据系统特点以及能量转换关系,建立了系统发电效率、发电功率、热效率以及热水温度的理论模型.利用该模型探究了太阳辐照度、热水箱容量、热水箱水温预设值以及系统串联量等设计参数对系统电、热性能的影响.研究结果表明,综合考虑当地太阳辐照度和所需热水温度,合理设定系统热水箱容量、水温预设值以及系统串并联数量,可提升热效率、发电效率.在特定集热器参数下,当太阳辐照度达550 W/m^(2)时系统满足设计要求,此时系统高温阵列热水温度为74.5℃,热效率为52.6%;低温阵列热水温度为52.3℃,热效率为60.4%;发电功率为58 W,发电效率为9.46%;系统太阳能综合利用效率为79.1%,相较于此前文献的研究结果,太阳能综合利用效率提升了30%.该系统为日后太阳能利用系统的设计以及其与轻钢装配式建筑一体化设计提供了一种新思路,对高效利用太阳能具有重要参考价值.

A novel multifunctional integrated solar energy utilization system is proposed in view of the lack of research on solar energy technology applied in light steel prefabricated buildings.To better analyze the performance of the system,theoretical models for generation efficiency,generation power,thermal efficiency and hot water temperature are established based on system characteristics and energy conversion relationships.The influences of design parameters including solar irradiance,capacity of hot water tank,preset temperature of hot water tank and system series quantity on electrical and thermal performance of the system are analyzed by using these established models.The results show that,to obtain higher thermal and electrical efficiency,it is essential to comprehensively consider the local solar irradiance and the required hot water temperature to determine the capacity of the hot water tank,the preset value of water temperature and the number of series and parallel connection of the system.Under given collector parameters,when the solar irradiance reaches 550 W/m^(2),the design requirements can be met.At this time,the hot water temperature of the high-temperature array of the system is 74.5℃,the thermal efficiency is 52.6%,the hot water temperature of the low-temperature array is 52.3℃,the thermal efficiency is 60.4%,the power generation is 58 W,the power generation efficiency is 9.46%and the comprehensive utilization efficiency of solar energy of the system is 79.1%.Compared with the experimental results of literature research,the overall solar energy utilization efficiency is increased by 30%.The proposed system provides a new idea for the design of solar energy utilization systems and integrated design with light steel prefabricated buildings in the future,which has important reference significance for the efficient utilization of solar energy.