燃池在日光温室应用的试验研究

燃池加温是一种利用生物质能的新型加温方法。燃池燃烧是一种阴燃过程,不需任何助燃措施,即可放出热量,提高温室的地温和气温,加热均匀,持续稳定。在不同日光温室中进行的对比试验表明,利用燃池可以显著提高温室的地温和气温,室内外平均温差达到30℃以上。     

小型太阳能海水淡化装置

基于空气增湿-除湿海水淡化技术,采用热海水与空气逆流对喷的空气加湿器,设计了结合太阳能集热器的小型太阳能海水淡化系统。试验结果表明,该结构的空气加湿器具有很好的加湿效果,出口空气相对湿度可达到98%以上。当喷水温度为60℃、空气流量为11.8 L/s时,该小型海水淡化装置产水率可达3.42 kg/h。     

Experimental study on spiral flow passive solar water heater

This study presents the experimental analysis of spiral flow flat plate collector passive solar water heater. A solar water heater was fabricated with spiral shaped copper water tube fixed on the flat plate aluminium absorber plate. The experiments were conducted at Kovilpatti (9°10′ N, 77°52′ E), India, during summer. Variations in exit water temperature and efficiency of the system were studied for different mass flow rates. Around 2 pm, the system reached the maximum efficiency point. The maximum efficiency of the system was 65.98% at 0.015 kg/s mass flow with exit water temperature of 95°C when the ambient temperature was 36°C.     

直膨式太阳能热泵运行特性的实验研究

对直接膨胀式太阳能热泵热水系统进行了实验研究,实验期间,太阳能辐照度变化范围为143.12~664.6 W/m2,分别采用三种不同结构的集热器和蒸发器,得出系统COP为2.49~3.47,表明该系统在各种天气情况下均能够可靠地生产45℃的生活热水,热性能稳定,可以全天候地提供生活热水且具有节能效果;同时选取双集热器的两组数据,分析了太阳辐照度对热泵系统运行的影响。     

Experimental scrutinization on conversion of seawater into drinking water using solar energy

The paper investigates the experimental studies on conversion of seawater into drinking using solar energy with the help of single basin double slope solar still unit.     

日光温室加内保温幕的试验

减少夜间通过前屋面的散热是日光温室节能的关键。文章对室内前屋面下设置保温幕的试验温室(有幕温室)与相同结构的不设保温幕的对比温室(无幕温室)的温度环境进行了测试比较。测试结果显示:内保温幕的设置有效地抑制了夜间通过前屋面由于温差引起的散热,并提高了晴天夜间室内的温度。     

Air pollution dispersion by using solar energy

A mathematical analysis as well as some field experiments were conducted to investigate the possible effects of convective currents in inclined plates exposed to solar radiation on the roof of a building. An array of such inclined plates might be used as a radiation shield to decrease the heat load of a building, as well as to mitigate the air pollution in its vicinity.     

夏季降温的太阳房实验分析

对建造在南宁市西郊的一座被动式太阳房在夏季运行时的实验数据进行了分析，其屋顶集热表面在夏季夜间能产生一定的致冷效果。所制取的冷空气不但在夜间可以对该太阳房起到降温的作用，并且可以储藏起来以供白天降温使用。     

Exergetic utilization of solar energy for feed water preheating in a conventional thermal power plant

This communication is based on exergy concept for the utilization of solar thermal energy in a Rankine cycle‐based fuel‐fired thermal power plant (FFTPP). It has been shown that solar thermal energy as an aided source for feed water preheating helps to reduce the exergy loss in feed water heater (FWH) of Rankine cycle and develops more work than that could have been produced in a solar thermal power plant (STPP). It has been found that this enhancement in work increases for low‐pressure FWHs. For further illustration, a case study has been carried out of a typical 50 kW STPP and a 220 MW FFTPP. The effect of utilizing the same input solar thermal energy of typical STPP, if used as an aided source in a 220 MW FFTPP for feed water preheating is investigated. The work output of STPP is 59.312 kW, while the extra work output of FFTPP by using solar thermal energy of STPP is 90.27 kW. It has been found that the efficiency of work conversion of aided solar thermal energy in FFTPP is higher than the efficiency of work conversion in STPP. Copyright © 2009 John Wiley & Sons, Ltd.     

On optimal zone heating and energy conservation in passive solar buildings

Strategies for reducing the energy consumption of buildings include energy conservation, passive solar, and zone heating systems. In this paper, the constrained and global interzonal and overall building load coefficients, and the optimal mix of energy conservation, passive solar and zone heating are calculated as a function of economic and thermal parameters. Results are presented for the sensitivities of the optimal cost fractions to changes in the cost of passive solar and zone heating. For representative costs, the analysis indicated the largest component is energy conservation, followed by passive solar, zone heating and interzonal insulation.     

Experimental study on house cooling and heating with solar energy using flat plate collector

The OSE Project aims at developing the technology to utilize solar energy for heating, cooling and hot water supply on the basis of various technology for energy conservation in buildings. For the first step of this project a solar heating and cooling system with flat plate collectors and absorption refrigeration machine was installed in a house in 1974. This paper reports outlines of the system and operating results.     

太阳能热化学制氢技术研究进展

总结了目前国内外太阳能制氢方法的研究现状,经过分析比较,确定太阳能热化学制氢具有极大的潜在发展空间.同时详细介绍了该方法的最新进展,对该方法研究中存在的问题提出了合理的改进建议.     

新型槽式太阳能聚光集热器的研究与试验

设计了一种新型槽式太阳能聚光集热器,分析了工作原理和设计参数,建立了由该集热器组成的太阳能集热系统,并进行了试验测试。文章给出了采用不同接收器的升温曲线和效率计算值,对不同布置方式的集热性能进行了比较。试验结果表明,该装置具有较高的集热效率,运行温度在80℃时,效率达到35%以上。     

Development and research of the technology for powdering agricultural products using solar energy

This paper presents the results of studies on the development of the technology for powdering agricultural products using solar energy. It is found that the evaporation of moisture from crushed products (pasty mass) is similar to the evaporation from the free water surface. It is much more intensive than the evaporation from noncrushed products and usually consists of one stage.     

长春地区太阳能辅助地源热泵供热的可行性研究

长春地区地下土壤导热系数低,长时间采用地源热泵来供暖,热泵的效率较低。通过对长春地区太阳能资源分布规律的分析,从技术性、经济性方面对太阳能辅助地源热泵供热与单独采用地源热泵供热进行比较。结果表明：太阳能辅助地源热泵供热方案效果良好、经济可行。因此,在长春地区,利用太阳能辅助地源热泵供热是完全可行的。     

利用可视化炉膛火焰检测对两种不同燃烧方式的实验研究

燃烧火焰是燃烧状态稳定与否的最直接反映。利用可视化火焰检测系统对两台机组进行实炉测量,从火焰图像中提取更多的监视和诊断信息,对实验结果进行了分析。实验结果表明:该系统能够正确、实时跟踪燃烧火焰的温度变化,定量给出火焰温度变化,快速地对燃烧状态进行检测。     

Use of an integrating sphere in solar energy research

Models for the evaluation of total diffuse and specular reflectance and transmittance components for scattering samples measured on an integrating sphere are presented. It is demonstrated that for typical solar energy surfaces serious errors can be the result of incorrect interpretation of the detector signals. Methods to avoid such errors are presented.     

太阳能空调热水系统研究分析

前言日益普及并呈加速发展的室内空气调节 ,需要消耗大量电能和化石燃料。常规空调制冷剂ＣＦＣｓ 对大气臭氧层有破坏作用 ,影响环境。因此 ,在空调制冷技术的发展与应用中 ,面临着节电、节能和环保三大问题。当前不用氟氯烃作工质、热驱动的吸收式制冷 ,日益受到人们的重视。太阳能是取之不尽 ,用之不竭 ,可再生的清洁能源。太阳能热水器现已发展到非常成熟的水平 ,它是以获取生活热水为目的的。但这种应用方式与人们的生活需求正相反 ,当夏季太阳辐射强、气温高的时候 ,太阳能热水器产生的热水量最大 ,而此时最需要的是空调降温而不是热…     

On eliminating peak load auxiliary energy consumption in passive solar residences during winter

This paper uses simulation analysis with Albuquerque, NM and Madison, WI weather data to address the following four questions:

1. Assuming a properly designed and controlled passive house, how does total electrical auxiliary energy consumption depend on the choice of peak load blackout periods?

2. What comfort penalties arise from properly coping with a variety of peak load blackout periods?

3. Where should off-peak energy be introduced into the thermal masses of the house?

4. What are the effects of imprecise information on short term future weather?

Using a combination of linear programming and gradient techniques, the following conclusions are obtained:During the worst days of the heating season, passive solar houses built above ground use a substantial amount of peak backup energy even if they are well designed. Even relatively crude off-peak controls provide reasonable comfort provided the energy is introduced in thermal masses well coupled to the room [e.g. 0.05 m (2 inches) beneath the inside face of the Trombe wall or 0.05 m (2 inches) below the top of the slab floor]. Introducing off-peak energy in thermal masses poorly coupled to the room (e.g. deep in the floor slab) makes proper control very difficult without very accurate weather prediction.Reducing backup use to zero from 7 am to 10 pm requires a doubling of daily backup use in Albuquerque and Madison. Excluding backup for shorter periods (e.g. 5 pm to 9 pm) requires an increase of about 25% in daily backup consumption.Even if off-peak energy is stored at points reasonably well coupled to the room, significant backup and comfort penalties are incurred with erroneous weather forecasts. Even in two adjacent days in Madison, reversing the weather patterns while maintaining the same off peak control strategies resulted in either wasting half the backup energy or severely under heating the house. The effects of faulty weather forecasts are more severe when poorly coupled storage sites are used.