Sol-air temperature and daylight illuminance profiles for the UKCP09 data sets

Tham, Yieng Wei; Muneer, Tariq

doi:10.1016/j.buildenv.2010.11.014

Cited by 19 publications

(10 citation statements)

References 18 publications

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“…Decompose into monthly-averaged hourly global irradiation [10,23,24] Split into monthly-averaged hourly diffuse and beam radiation using presently proposed regression for averaged data.…”

Section: List Of Figuresmentioning

confidence: 99%

Monthly averaged-hourly solar diffuse radiation model for the UK

Muneer

Pereira

Gago

2014

Building Services Engineering Research and Technology

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Monthly-averaged daily global irradiation data are now easily available from NASA website. Using established models it is then possible to decompose the daily-to averaged-hourly global irradiation. The missing link so far has been hourly averaged diffuse irradiation. In this article data was pooled from 10 UK locations to obtain a regression model to complete the above missing link. It was presently shown that the averaged-data regressions are distinctly different from previously available hour-by-hour regressions.

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“…Decompose into monthly-averaged hourly global irradiation [10,23,24] Split into monthly-averaged hourly diffuse and beam radiation using presently proposed regression for averaged data.…”

Section: List Of Figuresmentioning

confidence: 99%

Monthly averaged-hourly solar diffuse radiation model for the UK

Muneer

Pereira

Gago

2014

Building Services Engineering Research and Technology

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“…Heat on walls has to be prevented in summer to avoid unnecessary cooling loads [1]. It is shown that, in any season, the exterior surface of a wall reaches temperatures higher than those of its indoor surface [2]. By using exterior wall heat to generate energy, buildings can utilize heat that is otherwise wasted and also reduce cooling loads.…”

Section: Introductionmentioning

confidence: 99%

Passive generation from a novel thermoelectric energy harvesting system model integrated with phase change material

et al. 2019

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The purpose of this research is to evaluate the performance of a novel model that incorporates a thermoelectric generator (TEG) and phase change material (PCM). The proposed model passively generates electricity using waste heat that accumulates at exterior wall surfaces. The main generator is a TEG. To maintain the temperature difference between the two sides of the TEG, PCM is located at its cold side—thus converging the heat transferred into latent heat. The proposed passive generation system is formed into a TEG-PCM block. The block can be stacked to form a wall or inserted into any part of a building that faces the sun. The experiment setup is based on a constant temperature method. The wall temperature profile is set according to solar radiation, convection, and radiative heat transfer. To replicate daily wall temperatures during the experiment, a heat plate is used to match a wall temperature profile. Step control was used for the heating plate. The resulting data shows the average temperature difference between the hot and cold sides of the TEG to be 10-20°C. The peak generated electricity was 0.08 W for a single module.

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“…To the best of our knowledge, there presently exists no method for measurement of h o at building surfaces under typical outdoor conditions. Therefore, h o has often been selected to a constant value, representing a selected range of convective and longwave radiative environments (Mathews et al, 1994; Naveros et al, 2014; Tham and Muneer, 2011). The estimation of h o has been identified as a major source of uncertainty in the prediction of T o (O’Callaghan and Probert, 1977).…”

Section: Introductionmentioning

confidence: 99%

Step-transient method for measurement of the heat transfer coefficient at surfaces exposed to simulated building outdoor environments using the sol-air thermometer

Ohlsson

Östin

Olofsson

2018

Journal of Building Physics

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The environmental boundary conditions of the building exterior surface could be expressed in terms of the sol-air temperature T o and the heat transfer coefficient h o. This has previously been derived by applying Thevenin's theorem to the linear thermal network model of the convective and radiative environment. Here, the sol-air thermometer, previously used only for measurement of T o , was applied for accurate measurement of h o. The step-transient method was used, where the temperature of the sol-air thermometer was initially raised to above T o and then monitored during its transient return to thermal equilibrium. This method was validated by (1) comparison of h o results against values obtained with a steady-state method and (2) comparison of predicted heat flux against the electrical heater power, supplied for validation purpose. Accurate results were obtained, with 7.3% measurement uncertainty. The present solair thermometer time constant t was around 1 h. Based on predictions from dynamic modelling, the t could be reduced 10-fold, with only small effects on the accuracy from heat loss through the insulation layer.

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Sol-air temperature and daylight illuminance profiles for the UKCP09 data sets

Cited by 19 publications

References 18 publications

Monthly averaged-hourly solar diffuse radiation model for the UK

Monthly averaged-hourly solar diffuse radiation model for the UK

Passive generation from a novel thermoelectric energy harvesting system model integrated with phase change material

Step-transient method for measurement of the heat transfer coefficient at surfaces exposed to simulated building outdoor environments using the sol-air thermometer

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