摘要：With the huge consumption of traditional fossil energy and the consequent environmental and economic pressure,the development of a new energy that is cheap,green and rich has become an urgent issue for human *** energy is a kind of abundant green renewable energy,and the technology of solar cells that can convert solar energy into electric energy is one of the effective ways to solve the energy and environmental crisis.

摘要：Domestic solar hot water system, the use of the status quo and existing problems, by analyzing the solar water heating equipment and building integrated and building integrated design.

摘要：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.

摘要：Dual-roof solar greenhouse, a new style of solar greenhouse, was designed in this study intending to reduce heat loss in cold time and improve land use efficiency in Beijing, the Capital city of China. Designing and applying the dual-roof greenhouse in metropolitan area had dual effects of saving energy and enhancing land use efficiency. According to the monitoring study and analysis conducted in winter of 2012, the averaged night temperature of south room was about 12.1°C in December, which was satisfying for growing average leaf vegetables. Total energy saved by dual-roof in whole winter was quantified as 1.1 × 107 MJ&#46yr-1 (winter), potentially about 37.4 t coal was saved in Beijing area during whole winter-growing period. Considering the application of north room, the land use efficiency was improved by 62.5% in dual-roof solar greenhouse.

摘要：solar collectors can provide clean, renewable, and domestic energy. The tilt angle and horizontal direction of solar collectors significantly affect its efficiency. There are many good methods to search the optimum tilt angle and horizontal direction to realize the maximum total radiation on the solar collector within a particular day or a specific period. However, it is hard to realize it when solar collectors are placed under obstacle’s shadows;especially when some obstacles, such as trees, have irregular shapes. This paper presents algorithms to achieve the best tilt angle and horizontal direction for solar collector’s performance under the free-form surfaces 3D obstacle’s shadow. The solution process is composed of 4 steps. First, it creates a 3D scene, in which a unique color is given to the solar collector. Second, it employs orthographic projection from the point of view to get an image of the scene. Third, the number of pixels is used to represent the efficiency of the solar collector by counting the pixels of the unique color. Fourth, the efficiency of solar collector in each direction in a period of time is calculated with many images to further select the best direction.

摘要：Energy crisis promotes the development of renewable energy, especially the solar energy. Sun tracking system proposed in this paper is such a device for efficiency improvement. This closed loop tracking system with two axis sun tracking method is controlled by a programmable logic controller (PLC) and is used for a large dish solar collector. A combination tracking mode combined active and passive tracking methods used in the design make the tracker efficient whatever the circumstances. Two stepper motors and two reduction boxes move the device towards the sun with chain transmission. Besides sun tracking, the system also has functions of overheat monitoring, wind speed monitoring and measurement of illumination.

摘要：The provision of fresh water is becoming an increasingly important issue in many areas of the world. Clean water is a basic human necessity, and without water life will be impossible. The rapid international developments, the industrial growth, agriculture and population explosion all over the world have resulted in a large escalation of demand for fresh water. The solar still is the most economical way to accomplish this objective. The sun’s energy heats water to the point of evaporation. When water evaporates, water vapour rises leaving the impurities like salts, heavy metals and condensate on the underside of the glass cover. solar distillation has low yield, but safe and pure supplies of water in remote areas. The attempts are made to increase the productivity of solar still by using nanofluids and also by black paint coat- ing inside the still basin. Heat transfer enhancement in solar still is one of the key issues of energy saving and compact designs. The essential initiative is to seek the solid particles having thermal conductivity of several hundred times higher than those of conventional fluids. Recently, as an innovative material, nanosized particles have been used in sus- pension in conventional solar still water. The fluids with nanosized solid particles suspended in them are called “nanofluids”. The suspended metallic or nonmetallic nanoparticles change the transport properties, heat transfer characteristics and evaporative properties of the base fluid, The aim of this paper is to analyze and compare the enhanced performance of a single basin solar still using nanofluids with the conventional water. They greatly improve the rate of evaporation and hence the increase in efficiency.

摘要：近年来,有机太阳能电池非富勒烯受体(NFAs)的研究取得了重大进展,且在叠层器件中实现了超过17%的光电转换效率(PCE).目前,具有线型稠合受体-供体-受体(A-D-A)结构的NFAs因其优异的合成灵活性和高光伏性能而受到了广泛关注.其中,饶丹宁染料是构建这类A-D-A型NFAs的最为常见的吸电子受体单元,且所得单结太阳能电池的PCE已超过10%.尤为重要的是,饶丹宁受体与众所周知的P3HT供体结合时表现出十分优异的相容性,进而获得了7%的PCE.因此,本文总结了饶丹宁非富勒烯受体材料的研究进展,侧重于讨论其分子设计策略,旨在帮助读者更好的理解这类非富勒烯受体的构性关系.

摘要：2015年,solar Impulse 2尝试环球飞行,这是一架完全由太阳能驱动的飞机,向世人展示使用替代能源能够完成设计、制造太阳能飞机并完成环球飞行的极限挑战。solar Impulse2采用达索系统3DEXPERIENCE平台进行飞机设计和装配的仿真,3DEXPERIENCE平台帮助solar Impulse工程师确定飞机的最佳重量、尺寸配置、最佳驾驶舱设计,并在制造飞机之前避免装配问题。

摘要：近年来,柔性化、微型化、集成化能量转换和储存器件引起人们的广泛关注,其中电极材料发挥着举足轻重的作用.一种电极材料通常只能满足一种特定能源器件的需求,如何通过电极材料的结构化设计,获得一种能同时满足两种或两种以上能源器件的共用电极,对于高性能集成器件具有重要意义.本文基于化学气相沉积法生长的连续石墨烯中空纤维,通过对管内选择性修饰,报道了一端生长聚苯胺、另一端生长铂纳米颗粒的局域功能化石墨烯纤维.其中,聚苯胺/石墨烯纤维可作为纤维状超级电容器的电极,器件的比容量达到284 m F cm-2;铂/石墨烯纤维部分可取代传统的铂丝对电极,用于染料敏化太阳能电池,能量转换效率为4.73%.以该区域功能化石墨烯纤维作为共用电极,所发展的太阳能电池/超级电容器集成器件的总能量转换和储存效率达到3.07%,明显高于其他已报道的纤维状能量转换和储存集成器件.另外,利用该方法能够进一步在连续中空石墨烯管内修饰其他活性材料,从而应用于其他柔性可穿戴电子器件领域.