A literature review of night ventilation strategies in buildings

Solgi, Ebrahim; Hamedani, Zahra; Fernando, Ruwan; Skates, Henry; Orji, Nnamdi Ezekiel

doi:10.1016/j.enbuild.2018.05.052

Cited by 101 publications

(43 citation statements)

References 89 publications

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“…The larger the coefficient, the easier heat is transferred from its source to the product being heated. In a heat exchanger, the relationship between the overall heat transfer coefficient (U) and the heat transfer rate (Q) can be demonstrated by using equation 3 [3,4,15]. Q=U*A*(∆T) From this equation we can see that the U value is directly proportional to Q, the heat transfer rate.…”

Section: Overall Heat Transfer Coefficientmentioning

confidence: 99%

Home Appliances Efficiency Improvements for Energy Conservation in Debre Berhan City; Ethiopia

Kebede¹,

Gont²

2018

AJEE

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This paper presents the analysis of efficiency improvements of home appliances such as Electrical Stove (Injera Mitad), Electrical Showers, Kerosene Stoves, Charcoal Stoves and Small Electrical Stoves for energy conservation. Most of the existing stoves have been manufactured by small facilities without any regard for energy efficiency standard and safety. It suffers from many shortfalls, such as, poor insulation, lack of temperature regulation, bulkiness and overall poor design that encourages wastage of heat. The energy efficiency of the ordinary electric stove is very low since much of the heat energy is lost through the bottom, its sides, on the top part of the oven and also due to the much delay in the existing Injera baking procedure. The overall efficiency of the electrical shower is affected by the reservoir efficiency and the characteristics of the pipe. Kerosene and charcoal stoves have high heat energy loss due to lack of insulation to their external cover. Therefore, the efficiency of those electrical home appliances can be improved by minimizing the losses through their covers and parts. This can be achieved by selecting appropriate low thermal conductivity materials and insulations.

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Section: Overall Heat Transfer Coefficientmentioning

confidence: 99%

Home Appliances Efficiency Improvements for Energy Conservation in Debre Berhan City; Ethiopia

Kebede¹,

Gont²

2018

AJEE

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“…It can be implemented by means of different strategies, such as stack induced ventilation and cross-section ventilation (Mahdavi and Pröglhöf, 2008;Emmerich et al, 2011). Furthermore, it ensures high effectiveness in most climate types, especially when it is applied during nighttime (i.e., night ventilation) in order to reduce building cooling demand (Solgi et al, 2018). Therefore, natural ventilation represents one of the most promising passive strategies to achieve high performance buildings and to enhance thermal comfort and IAQ (Wang and Malkawi, 2019).…”

Section: Introduction and Aim Of The Studymentioning

confidence: 99%

“…For instance, it is difficult to be rigorously controlled and its effectiveness highly depends on wind velocity, as well as on the characteristics of outdoor air in terms of temperature, humidity and level of pollution. Morevoer, natural ventilation needs a robust design optimization in order to ensure energy savings and thermal comfort (Solgi et al, 2018;Yang et al, 2019), and in some cases, it can provide higher ventilation rates compared to mechanical ventilation, which can raise the issue if increased indoor pollutant concentration (e.g., PM2.5, PM10 and ozone) from outdoor sources in polluted urban or industrial areas (Chen et al, 2019). On the other hand, mechanical ventilation causes an increase of building energy needs.…”

Section: Introduction and Aim Of The Studymentioning

confidence: 99%

Optimizing Hybrid Ventilation Control Strategies Toward Zero-Cooling Energy Building

Hamdy

Mauro

2019

Front. Built Environ.

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Optimal ventilation strategies are fundamental to achieve net/nearly-zero energy buildings. In this study, three hybrid ventilation control strategies are proposed to minimize the cooling need in an open-plan office building, located in the center of Glasgow (Scotland). The performance of the three proposals is assessed by IDA ICE (a whole building performance simulation tool) and compared to a traditional fully mechanical ventilation system. The performance comparison includes different criteria, i.e., indoor temperature and predicted percentage of dissatisfied (PPD) for assessing the indoor comfort, and CO 2 level for assessing the indoor air quality (IAQ). The results show that the three proposed hybrid ventilation strategies are able to minimize the cooling need to zero. They can also imply a drastic reduction of AHU heating power, compared with a mechanical ventilation system without heat recovery (or with low efficiency heat recovery). In addition, they significantly save the fan energy. The only drawback of the proposed strategies is that they might increase space heating demand. For instance, the first and second strategies save about 75 and 50% of AHU (air handling unit) fan energy; however, the space heating increases by about 4.2 and 2.2 kWh/m 2 a, respectively. The third strategy features as the best proposal because it saves around 68% of fan energy with less increase (1.3 kWh/m 2 a) in heating demand. Moreover, it ensures higher thermal comfort and IAQ levels compared to the first and second proposals.

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“…It gives an overview on numerical aspects about fire in road tunnel. [2] presented an overview of ventilation strategies in buildings but their focus is not on fire events. It has been identified that there is no study so far that has been published or written that reviews fire ventilation systems in different environments such as car park, tunnels and buildings.…”

Section: Introductionmentioning

confidence: 99%

Review of common fire ventilation methods and Computational Fluid Dynamics simulation of exhaust ventilation during a fire event in Velodrome as case study

2019

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The main purpose of fire engineering design is to ensure human safety in the situations of fire in buildings, car parks and tunnels. Toxic gases and carbon monoxide induced by fire get the life of many fire victims, hence, fire safety elements like velocity, heat and smoke dynamics have been focused by many researchers to facilitate safe exit in the case of fire. The goal of this paper is to review the fire ventilation methods in fire safety and measurement methods used as the performance of ventilation systems. Managing the smoke in case of fire can reduce the carbon monoxide that poses the deadliest risk to people. Thus, the control and removal of gases and smoke in the case of fire is crucial in human safety and saving a property. In addition, this paper conducts a case study on smoke propagation and removal of smoke from Velodrome environment in which fire occurred. To conduct this case study, Computational Fluid Dynamics (CFD) simulation of exhaust ventilation system for managing smoke in building's environmental called Velodrome has been developed. The results were investigated and analysed in 3-dimensional plane. The results of these CFD simulations show that the source of fire can be removed by activating exhaust system, and thus, the risk of fire victims' s life and damaged property can be reduced.

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A literature review of night ventilation strategies in buildings

Cited by 101 publications

References 89 publications

Home Appliances Efficiency Improvements for Energy Conservation in Debre Berhan City; Ethiopia

Home Appliances Efficiency Improvements for Energy Conservation in Debre Berhan City; Ethiopia

Optimizing Hybrid Ventilation Control Strategies Toward Zero-Cooling Energy Building

Review of common fire ventilation methods and Computational Fluid Dynamics simulation of exhaust ventilation during a fire event in Velodrome as case study

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