R-value (insulation)

（重定向自Insulation value）

Aerogel is an extremely efficient synthetic insulator and has a very high R-value.

The R-value is a measure of thermal resistance used in the building and construction industry. Under uniform conditions it is the ratio of the temperature difference across an insulator and the heat flux (heat transfer per unit area per unit time, $\dot Q_A$ ) through it or $R = \Delta T/\dot Q_A$ . Thermal resistance varies with temperature but it is common practice in construction to treat it as a constant value.

单词	Insulation value
释义	Insulation value 原声例句 VOA Standard 2014年5月合集 She said her product is cheaper, stronger, and has a higher insulation value, which will result in less deforestation. 她说她的产品更廉价、结实，有更好的绝缘性，这样就无需更多砍伐森林了。英语百科 R-value (insulation) （重定向自Insulation value） The R-value is a measure of thermal resistance used in the building and construction industry. Under uniform conditions it is the ratio of the temperature difference across an insulator and the heat flux (heat transfer per unit area per unit time, $\dot Q_A$ ) through it or $R = \Delta T/\dot Q_A$ . Thermal resistance varies with temperature but it is common practice in construction to treat it as a constant value.
随便看	a clip的意思 a clip on the ear的意思 a clip round the ear的意思 Aclistochara的意思 a. clitoridis的意思 aclj的意思 ACLJ International Incorporated的意思 ACLL的意思 acllas的意思 acllideic i的意思 ACLM的意思 AC load line的意思 AC load switching的意思 a clock的意思 A Clockwork Orange的意思 ac locomotive的意思 a clone的意思 aclonifen的意思 Aclophen的意思 aclophora xystica的意思 aclor的意思 aclorhydria的意思 ACLOS的意思 a close的意思 ACLOS的意思