Analysis for superior radiation resistance of InP-based solar cells

Better radiation resistance of InP-based solar cells such as InGaP and InGaAsP cells, and minority-carrier-injection-enhanced annealing phenomena of radiation-induced defects in those materials previously found by the authors has been analyzed by considering introduction rates and annealing behavior of radiation-induced defects in InP-related materials. Radiation resistance of InP-related materials is found to be explained by lower damage coefficients and band-gap energy effects on solar cell degradation compared to other materials.     

基于时空守恒方法的内燃机进排气系统一维非定常流计算模拟

本文运用时空守恒元与解元方法对进排气系统中的气体流动进行了模拟计算。以某单缸汽油机为实例进行计算，计算结果与实测值吻合较好，同时预测了某柴油机在不同工况时的残余废气系数。     

Experimental evaluation of radiator control based on primary supply temperature for district heating substations

In this paper, we evaluate whether the primary supply temperature in district heating networks can be used to control radiator systems in buildings connected to district heating; with the purpose of increasing the ΔT. The primary supply temperature in district heating systems can mostly be described as a function of outdoor temperature; similarly, the radiator supply temperature in houses, offices and industries can also be described as a function of outdoor temperature. To calibrate the radiator control system to produce an ideally optimal radiator supply temperature that produces a maximized ΔT across the substation, the relationship between the primary supply temperature and outdoor temperature must be known. However, even if the relation is known there is always a deviation between the expected primary supply temperature and the actual temperature of the received distribution media. This deviation makes the radiator control system incapable of controlling the radiator supply temperature to a point that would generate a maximized ΔT.     

某航天器仪器舱结构减振试验研究

改善大型结构的动态特性对航天器总体设计具有十分重要的意义。本文基于粘弹性材料对振动能量的耗散原理,分析了利用约束阻尼对航天大型结构进行振动抑制的方法。以某航天器仪器舱为例,进行了附加约束阻尼前后结构动态特性试验与,分析结果验证了该方法抑制振动的可行性和有效性,对大型航天结构的减振设计具有实用价值。     

神经元在室温控制系统中的应用研究

文中简述了室内温度控制的基本结构和工作原理，提出了一种基于神经元控制的两位式室内温度控制方案，仿真实验证实了神经元在室温控制系统中应用的可行性。     

实木复合地板在居室环境设计中的应用

木地板种类繁多,其中实木复合地板是应用最为广泛、发展前景最好的品种之一。现阶段人们非常注重地板的材质和环保性能,却往往忽视地板与家居整体环境的协调,导致装修后整体效果不及预期。本文针对这种现象,结合实木地板的基本特性和室内设计的相关知识,总结了实木复合地板的组织设计原则及其与家具色彩的搭配方式,通过大量实例,生动展示了如何根据装饰装修风格来组织设计实木复合地板的颜色、纹样和功能,从而使家具陈设、墙面装饰、顶棚设计以及地面的铺装布局,在三维立体空间内实现多元有机互动,营造协调、宁静,并富有文化底蕴的室内环境氛围。     

COMMUNITY SOLAR HEATING SYSTEM: A CASE STUDY FOR JORDAN

In this paper a study was carried out on the feasilibity of using solar energy for a direct space heating of a residential complex in Jordan, constructed from special building materials to reduce heat losses. A computer simulation was carried out for the solar heating system and indicated that an 81 m² of collecting area was the most cost effective, giving an annual solar contribution to the total annual heating load of 0.987. The remaining portion of the load is to be supplied by an auxiliary system. The economical analysis gave a net saving of almost 27000 J.D over a period of twenty years.     

通信机房节能技术

简要介绍通信机房的节能背景以及节能降耗的基本原则,着重阐述UPS电源节能、新风节能和专业空调节能等技术的应用,分析造成能源浪费的原因,提出当前机房环境下的节能措施。     

Multilevel converters control for renewable energy integration to the power grid

The paper deals with the multilevel converters control strategy for renewable energy resources integration in distribution grids. The proposed control scheme ensures the injection of the generated power in the distribution grid with fast dynamic response, while providing an additional active power filtering capability providing the required harmonic and reactive currents to the considered non-linear loads. The proposed control scheme is applicable to a general multilevel converter and to any types of the renewable energy resources. The control scheme is validated by means of simulations with a three-level diode-clamped converter which interfaces a wind power generation system to a distribution grid supplying non-linear loads. From extensive simulation results, high performance of this control strategy in renewable energy application is demonstrated with reduced total harmonic distortion, increased power factor and compensated load’s reactive powers.     

Direct utilization of geothermal energy 2010 worldwide review

This paper presents a review of the worldwide application of geothermal energy for direct utilization, and updates the previous survey carried out in 2005. We also compare data from 1995 and 2000 presented at World Geothermal Congresses in Italy and Japan, respectively (WGC95 and WGC2000). As in previous reports, an effort is made to quantify ground-source (geothermal) heat pump data. The present report is based on country update papers prepared for WGC2010 and other sources of data available to the authors. Final update papers were received from 70 countries of which 66 reported some direct utilization of geothermal energy. Twelve additional countries were added to the list based on other sources of information. Direct utilization of geothermal energy in 78 countries is a significant increase from the 72 reported in 2005, the 58 reported in 2000, and the 28 reported in 1995. An estimate of the installed thermal power for direct utilization at the end of 2009 is used in this paper and equals 48,493 MWt, almost a 72% increase over the 2005 data, growing at a compound rate of 11.4% annually with a capacity factor of 0.28. The thermal energy used is 423,830 TJ/year (117,740 GWh/yr), about a 55% increase over 2005, growing at a compound rate of 9.2% annually. The distribution of thermal energy used by category is approximately 47.2% for ground-source heat pumps, 25.8% for bathing and swimming (including balneology), 14.9% for space heating (of which 85% is for district heating), 5.5% for greenhouses and open ground heating, 2.8% for industrial process heating, 2.7% for aquaculture pond and raceway heating, 0.4% for agricultural drying, 0.5% for snow melting and cooling, and 0.2% for other uses. Energy savings amounted to 250 million barrels (38 million tonnes) of equivalent oil annually, preventing 33 million tonnes of carbon and 107 million tonnes of CO₂ being release to the atmosphere, this includes savings for geothermal heat pumps in the cooling mode (compared to using fuel oil to generate electricity).