首页
登录
职称英语
HUBRID SOLAR LIGHTING —Light the interiors of Buildings wit
HUBRID SOLAR LIGHTING —Light the interiors of Buildings wit
游客
2024-01-09
45
管理
问题
HUBRID SOLAR LIGHTING
—Light the interiors of Buildings with Sunlight!
Hybrid solar lighting is a system that captures sunlight on a roof top and uses optical fibers to channel it directly into a building. The only power needed to operate it is a 9-volt battery and the energy cost reduction, worker productivity and health benefits are immense.
It was originally developed by the US Department of Energy at its Oak Ridge National Laboratory and licensed to a company called Sunlight Direct. It has already been installed in a large number and a wide range of buildings in the USA including higher education institutions, museums, department stores and other specialty stores, initial reports declare that retail sales increase by as much as 40% when the switch is made from fluorescent lighting to hybrid solar. Furthermore, there is a major improvement in the attention spans and academic attainment of undergraduates in classrooms or lecture theatres lit by hybrid solar. It is to be hoped that the technology can soon be made financially feasible for households as well as commercial buildings.
It has been suggested that 30% of the electricity used in the USA is just for lighting and, for retailers, the estimate increases to 45%. Obviously, that figure could decrease significantly if sunlight could be brought inside. Hybrid solar lighting is predicted not only to save millions of dollars in energy costs but it is attractive for its quality which is almost identical to daylight.
A solar collector consisting of a 1.2 meter parabolic primary mirror concentrates the light toward a secondary mirror which has a special multi-layer coating that reflects only the visible wavelengths which effectively strips off the ultra-violet and infra-red wavelengths from the reflected light. This is important to reduce heat in the fiber optics which would otherwise melt. The visible light is focused from the secondary mirror towards a receiver module where it is homogenized to guarantee uniformity before it enters the fiber optic bundle which then passes into the building interior for lighting. The fibers are easily installed and replaced and unlike fluorescent lights that require energy, the hybrid solar system only needs one 9-volt battery to power the solar tracking system for a week.
The solar tracker mechanism consists of two motors that are controlled by a GPS (global positioning system) micro processor situated beneath it. This computes the exact position of the sun(based on the latitude, longitude, date and time)to within point one degree. The light collected shines brightly. Just two of these fibers emit enough light to be equivalent to a 60 Watt light bulb and there are 127 of fibers in one bundle. What if it is cloudy or rainy outside? That’s where the hybrid comes in. The lighting fixtures combine the sunlight with the artificial light from fluorescent or incandescent lamps to create a hybrid luminaries. A photo sensor in the room monitors the intensity and automatic adjustments are made in order to keep a constant level of illumination.
A room lit entirely by fluorescence has an orange glow which is not very natural. If the lighting is changed to 809/0 solar and 209/o fluorescent, it is far more aesthetically appealing. It is estimated that hybrid solar lighting could reduce their energy bill of most retailers by 609/o; and retail stores have been some of the first adopters of the new technology because of the health benefits gained from natural lighting. Studies have shown that 20% of workers under artificial light suffer symptoms of depression from Seasonal Affective Disorder (SAD). In addition, retail stores with natural lighting sold 40% more merchandise than stores with artificial light. Research has shown that biological rhythms and circadian rhythms are the secret to having successful and productive employees. ]Bringing in the natural light helps regulate these biological processes.
The technology has made such an impression that other scientists are looking at alternative applications: utilizing the UV light energy for hot water heating, for example. There is one limitation to the technology, however: although the plastic optical fibers are very low cost, they also have very low transmittance and extend for only around 15 meters from the solar collector. This is why currently solar hybrid lighting is primarily focused on the top and main floors of a building.
Overall, the potential electricity savings and carbon dioxide reductions are enormous. The units are designed to last twenty years and, as volumes of sales increase, the price should come down considerably. It may be a while before individual households can enjoy hybrid solar lighting but, in the meantime, there is a substantial benefit in that it is making many work and study spaces as natural and comfortable for humans as possible.
Questions 1-3
Complete the summary below with words taken from Reading Passage I.
Use NO MORE THAN TWO WORDS for each answer.
Write your answers in boxes 1-3 on your answer sheet.
A hybrid solar lighting system has been developed that uses (1) to illuminate buildings. Numerous advantages have been described, such as a boost in (2) and increased (3) and educational achievement amongst students. [br]
选项
答案
sunlight
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3346431.html
相关试题推荐
Justasglasswindowsofferbuildingsbothlightandinsulation,certainatmosph
Asanarchitectwhorehabilitatesolderbuildings,RobertaWashingtonobjected
Modernbuildingsareappearinginlargenumbers,somepeoplebelievethatwe
Shouldoldbuildingsbedestroyedandreplacedwithmodernones?Inthec
HUBRIDSOLARLIGHTING—LighttheinteriorsofBuildingswit
HUBRIDSOLARLIGHTING—LighttheinteriorsofBuildingswit
LookatthemapoftheSportsComplexbelow.Labelthebuildingsonthemapoft
LookatthemapoftheSportsComplexbelow.Labelthebuildingsonthemapoft
LookatthemapoftheSportsComplexbelow.Labelthebuildingsonthemapoft
LookatthemapoftheSportsComplexbelow.Labelthebuildingsonthemapoft
随机试题
RecentlyGeorgeandIhostedaspecialpreviewofPreciousinourhometown,
逆反射系数的单位为()。A.cd·lx-1·m-2 B.cd·lm-1·m-
磷酸戊糖途径在下列哪种情况下增强A.蛋白分解增强时B.糖异生时C.饥饿时D.糖原
下列有关“渠化交通”的表述,哪项是错误的?()A.适用于交通组织复杂的异形交叉
胸骨左缘第3肋间舒张期递减性杂音见于 A.二尖瓣关闭不全B.三尖瓣关闭不全
归纳法与演绎法的区别是()。 A.归纳法是从观察开始 B.演绎法是先推论后
与固定资产扩张相关的借款需求,其关键信息主要来源于公司管理层。()
自我概念的功能主要包括()。(2008-11)A:保持个体内在的一致性 B:解
共用题干 有8个互相独立的投资方案A、B、C…H,投资期限的寿命期为1年,投资
某企业从银行贷款2000万元,期限1年,年利率为8%。若按贴现法付息,则该贷款的
最新回复
(
0
)