参数定义 Definition
太阳能穿透率%Total Solar Transmittance
The percent of incident solar radiation that is directly passed through glazing system.
允许穿透玻璃窗的其中波长在300-2100毫微米的太阳能数量与照在上面的太阳能总量的比率,常用百分比来表达;
或:在太阳光谱(300纳米至2500纳米,含紫外光、可见光和近红外光)范围内,透过玻璃的太阳能强度对入射太阳能强度的百分比。
太阳能反射率%Total Solar Reflectance
The percent of incident solar radiation that is reflected by a glazing system.
由玻璃窗反射到室外的太阳能总量与落在窗上的太阳能总量之比,在有薄膜的反射是指对者窗户外表的那面反射的能量数量,通常也可以用百分比表示;
或:在太阳光谱(300纳米至2500纳米,含紫外光、可见光和近红外光)范围内,透过玻璃的太阳能强度对入射太阳能强度的百分比。
太阳能吸收率%Total Solar Absorption
The percent of incident solar radiation that is absorbed by glazing system.
玻璃窗吸收的太阳能数量与落在上面的总量之比。吸收的也就是除传递和反射的那部分,由于传递量和反射量可直接测得,吸收总量也就可按此等式算出:吸收总量=1。0-传递总量-反射总量;
可见光穿透率(透光率)%Visible Light Transmitted
The ratio of visible light transmitted through the window to that which is incident upon the window.
太阳光穿过玻璃窗的可见光的数量与投射在上面的之比。
或:在可见光谱(380纳米至780纳米)范围内,透过玻璃的光强度对入射光强度的百分比。
可见光反射率(反光率)Visible Light Reflected
The ratio of visible light that is reflected away from the surface of the window to that which is incident on the window.
玻璃窗表面反射的可见光数量与投射在上面的之比
或:在可见光谱(380纳米至780纳米)范围内,玻璃反射的光强度入射光强度的百分比。
发散率(辐射率) Emissivity
The measure of the ability of a surface to emit room temperature radiant heat energy. A low emissivity means a high reflectivity of room radiant energy.
用来表示玻璃表面散发室内温度辐射能的能力。反射率低说明室内辐射能的反射量大
紫外线隔断率UV Reduction
The ratio of the difference in ultraviolet transmission of the glass before and after installing film to the ultraviolet transmission of the glass with on film. It is expressed as a percentage and is determined by the respective UV transmission values of the glass with and without film.
使用薄膜之前的穿过窗户的紫外线数量与使用后的比值,用百分比表达,它是由使用薄膜前后的紫外线穿透值决定的。
“U”值 “U” Value
The measure of the ability of the window to transfer heat from one side to the other due to the difference in temperature of the air and surroundings on each side of the window. A low “U” value results in a low transfer of heat through the window.
表示窗户传递热量的能力。它会因气温、玻璃二面环境的不同而不同,U值低,说明玻璃传热能力差。
或:U值(K值)是玻璃组件的传热系数。ASHRAE标准条件下,由于玻璃热传递和室内外的温差,所形成的空气到空气的传热量。其英制单位为:英热量单位每小时每平方英尺每华氏温度。公制单位为:瓦每平方米每开氏温度。U值越低,通过玻璃的传热量也越低。
遮蔽系数(SC)Shading Coefficient
The ratio of solar energy that enters through a window compared to the energy entering a clear, double strength sheet of glass; includes both energy transmitted through the window and energy absorbed in the window.
指进入一窗户太阳热量与进入一透明无色双强度玻璃的之比。这里的热量包括穿过窗户的和窗户吸收的。SC体现了玻璃体系的隔断阳光的能力或效率;
或:相同条件下,太阳辐射能量透过某玻璃组件的量与透过3毫米透明玻璃的量之比就是该组件的遮阳系数,用SC表示。遮阳系数越小,阻挡阳光直接辐射的性能越好。
太阳能总隔断率%Total Solar Energy Rejected
The ratio of the amount of total solar energy that is prevented from passing through a glazing system to the amount of total solar energy falling on that glazing system.
由玻璃窗隔断的那部分太阳能是反射总量+玻璃吸收后又向外散发的那部分能量
隔热率(热量降低率)Heat Gain Reduction
The ratio of the difference in total solar energy before and after installing film on the glass to that entering through the glass with on film. It is expressed as a percentage and is determined by the respective shading coefficients of the glass with and without film.
使用薄膜之前透过窗户的太阳能数量与使用后的之比。它用百分比来表达。它由无薄膜和有薄膜后的荫蔽系数决定的。
保温率Heat Loss Reduction
The ratio of the difference in heat loss through the glass after installing film to the heat loss through the glass with on film. It is expressed as a percentage and is determined by the respective “U” values of the glass with and without film.
使用薄膜之后进入窗户的太阳能数量与之前的比值。用百分数来表达,它由使用薄膜前后的两个U值决定的。