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Author: William C. Cullen
Publisher:
ISBN:
Category : Radiation
Languages : en
Pages : 40
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Book Description
Twenty different built-up roof construction specimens, covered with five surfacing materials, were subjected to natural solar heating and nighttime cooling.The temperatures and temperature changes observed during winter and summer exposures are discussed.The data indicate that the temperature attained in a roof membrane is influenced by the absorptance and emissivity of the surface as well as the thermal and physical properties of the substrate to which the roofing is applied. The data show that roofings placed over insulation may be heated to a temperature of 80F. above ambient due to solar heating and may be subcooled as much as 20F. below the ambient due to radiative cooling.The thermal movements which occur in the components of a roof system due to temperature change are discussed in relation to built-up roof performance and failures.(Author).
Author: William C. Cullen
Publisher:
ISBN:
Category : Radiation
Languages : en
Pages : 40
Get Book
Book Description
Twenty different built-up roof construction specimens, covered with five surfacing materials, were subjected to natural solar heating and nighttime cooling.The temperatures and temperature changes observed during winter and summer exposures are discussed.The data indicate that the temperature attained in a roof membrane is influenced by the absorptance and emissivity of the surface as well as the thermal and physical properties of the substrate to which the roofing is applied. The data show that roofings placed over insulation may be heated to a temperature of 80F. above ambient due to solar heating and may be subcooled as much as 20F. below the ambient due to radiative cooling.The thermal movements which occur in the components of a roof system due to temperature change are discussed in relation to built-up roof performance and failures.(Author).
Author: William C Cullen
Publisher: Hassell Street Press
ISBN: 9781014386700
Category :
Languages : en
Pages : 42
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Book Description
This work has been selected by scholars as being culturally important and is part of the knowledge base of civilization as we know it. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. To ensure a quality reading experience, this work has been proofread and republished using a format that seamlessly blends the original graphical elements with text in an easy-to-read typeface. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Author:
Publisher:
ISBN:
Category : Building
Languages : en
Pages : 554
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Book Description
Author: Center for Building Technology
Publisher:
ISBN:
Category : Building
Languages : en
Pages : 120
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Book Description
Author: Jan F. Kreider
Publisher: CRC Press
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 504
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Book Description
Author: Colorado State University. Solar Energy Applications Laboratory
Publisher:
ISBN:
Category : Solar collectors
Languages : en
Pages : 716
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Book Description
Author: V H Goerke
Publisher:
ISBN:
Category : Ionospheric radio wave propagation
Languages : en
Pages : 486
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Book Description
Author: Jean A. Koch
Publisher:
ISBN:
Category : Spectroscope
Languages : en
Pages : 798
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Book Description
Author:
Publisher:
ISBN:
Category : Physical instruments
Languages : en
Pages : 44
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Book Description
Author: A. de Almeida
Publisher: Springer Science & Business Media
ISBN: 9401110549
Category : Technology & Engineering
Languages : en
Pages : 531
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Book Description
Since the mid-seventies, electric utilities were faced with escalating construction costs, growing environmental plus siting constraints and increasing uncertainty in demand forecasting. To cope with the increasing demand for energy services, utilities can either invest in supply-side options (new generation, transmission and distribution facilities) or in demand-side options. Demand-side options include, policies, programmes, innovative pricing schemes and high-efficiency end-use equipment (equipment providing the same or better level of services but using less energy or peak power). Recent experience in both North America and Europe show that demand-side options are usually cheaper and less damaging from the environmental point of view, and also their potential can be tapped in a shorter term than other supply-side options. This workshop was directed at the discussion and analysis of cost-effective methodologies to achieve the supply of electric energy services at minimum cost and minimum environmental impact. The programme included new developments in power planning models which can integrate both supply-side and demand-side actions. Quantitative assessments of the environmental impact of different supply-demand strategies were analyzed. Planning models which deal with uncertainty and use multicriteria approaches were presented. Case studies and experiments with, innovative concepts carried out by utilities in several countries were discussed. Load modelling and evaluation of demad-side programmes was analyzed. Additionally, the potential for electricity savings in the industrial, commercial and residential sectors was presented. New research directions covering planning models, programmes and end-use technologies were identified.
