Investigation on the cooling performance of a green roof with a radiant cooling system

Yeom, Dongwoo

doi:10.1016/j.enbuild.2017.05.035

Cited by 25 publications

(15 citation statements)

References 24 publications

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“…The average minimum temperature can provide an indication of the thermal performance of an indoor built environment. Less heating is required when the minimum temperature is higher than the outdoor minimum temperature and the control group [30]. Table 12 displays the daily indoor minimum temperature under non-heating and heating conditions, as well as temperature differences (∆T = T GR − T BL ).…”

Section: Comparative Analysis Of Thermal Performancementioning

confidence: 99%

Improvement of Indoor Thermal Environments through Green Refurbishment

Lee

2020

Sustainability

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This study investigates the performance of the “green refurbishment” of existing buildings. Two ordinary rooms in an existing building were chosen for examination. Refurbishment measures such as additional insulation, high-performance glazing, and air-tightening were applied to the control room. Temperature and electricity use were monitored to identify heating performance in winter and then compared with a baseline. The results of the field tests showed that green refurbishment significantly improved heating performance. Lowered heating load and electricity use with increased airtightness were also verified through building performance simulations. The empirical investigation suggests a predictive model to obtain indoor minimum temperatures as a function of outdoor temperature swings.

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Section: Comparative Analysis Of Thermal Performancementioning

confidence: 99%

Improvement of Indoor Thermal Environments through Green Refurbishment

Lee

2020

Sustainability

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“…There are some references studied cool and green roofs using Design-Builder software [18,20,22], Also some of studies concentrated on three different kinds of cool roofs using Energy+ platform [21]. Others used the experimental study to test green roofs [26][27][28]. These studies and others differed according to the type of tested material, climate, and methodology, and all of them and others are illustrated in Table (1).…”

Section: Literature Reviewmentioning

confidence: 99%

“…Others used the experimental study to test green roofs [26][27][28]. These studies and others differed according to the type of tested material, climate, and methodology, and all of them and others are illustrated in Table (1). Table (1) shows a lack of studies performed in hot-dry climates in general and the lack of using modern architectural concepts like Building Information Modeling (BIM) technique.…”

Section: Literature Reviewmentioning

confidence: 99%

“…Over the years, the increased use of air conditioning in buildings has led to a significant increase in energy consumption [1]. Buildings are responsible for more than 40% of world energy consumption and greenhouse gas emissions [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

“…amount of gained or lost heat in a room during a certain time period (J/S) .C p .V. From the above equation, it becomes clear that to decrease the energy consumption of a building, thermal comfort must be increased by reducing its heat gain, which can be reached by controlling one parameter or more from equation (1). As explained in Figure (3), two of these parameters represent the building envelope and its elements (walls, roofs, and windows).…”

Section: Introductionmentioning

confidence: 99%

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Evaluating the Effect of Different Passive Cooling Techniques of Roofs on Energy Consumption in the Buildings in Upper Egypt Using BIM

Ali

Mohamed

Elhefnawy

2020

ERJ. Engineering Research Journal

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The annual energy consumption rate in Egypt rises by 3.8% every year; traditional resources represent 92% of the generated energy. Taking into consideration the near depletion of their reserve and the included environmental issues with their use, it can be imagined that the energy situation in Egypt is disastrous. Therefore, improving the energy situation in Egypt became an urgent need. Reducing energy consumption in buildings, in particular, will help in reducing the overall consumed energy, since they consume 85% of the total energy production in Egypt. The design of roof slabs for thermal insulation purposes is required to reduce the energy consumed in buildings since they are accountable for 50% of the heat gain in a one-story building. By implementing passive cooling techniques, there are the chance to overcome the increased heat gain through roofs to reach the desired savings in energy. This search aims to evaluate the effect of different passive cooling techniques, applied to a student housing building's roof in Sohag University in new Sohag city in Upper Egypt, using building information modeling (BIM) platform. A review of the related scientific papers was carried out. Through this review, a matrix of 31 variables was conducted and applied to the building's roof. Energy consumption for every variable was calculated and compared to other variables. The findings proved that choosing the right passive techniques for roofs can help in reducing energy consumption by 46%. Also, some of these techniques may have a small effect on energy consumption.

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