Comparison of the Efficiency of Building Hybrid Ventilation Systems with Different Thermal Comfort Models

Fu, Xiaonan; Wu, Dingxin

doi:10.1016/j.egypro.2015.11.640

Cited by 18 publications

(7 citation statements)

References 17 publications

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“…vertical laminar), airflows can be generated, thereby enhancing airborne viral extraction before it can circulate in the room 90,61 . Moreover, studies have shown that the use of hybrid ventilation in conjunction with appropriate control strategies can result in considerable HVAC energy savings by using natural forces when they are sufficient, but with mechanical assistance when necessary 91,92 . Extract fans can be retrofitted in naturally ventilated rooms at short notice and at relatively low cost 93 .…”

Section: Ventilation and Air Purificationmentioning

confidence: 99%

“…61 , 90 Moreover, studies have shown that the use of hybrid ventilation in conjunction with appropriate control strategies can result in considerable HVAC energy savings by using natural forces when they are sufficient, but with mechanical assistance when necessary. 91 , 92 Extract fans can be retrofitted in naturally ventilated rooms at short notice and at relatively low cost. 93 Installation must be carried out professionally, particularly with regard to the power supply and controls, in the interests of avoiding accidents and fires.…”

Section: Ventilation and Air Purificationmentioning

confidence: 99%

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A multi‐layered strategy for COVID ‐19 infection prophylaxis in schools: A review of the evidence for masks, distancing, and ventilation

et al. 2022

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Implications for the academic and interpersonal development of children and adolescents underpin a global political consensus to maintain in-classroom teaching during the ongoing COVID-19 pandemic. In support of this aim, the WHO and UNICEF have called for schools around the globe to be made safer from the risk of COVID-19 transmission. Detailed guidance is needed on how this goal can be successfully implemented in a wide variety of educational settings in order to effectively mitigate impacts on the health of students, staff, their families, and society. This review provides a comprehensive synthesis of current scientific evidence and emerging standards in relation to the use of layered prevention strategies (involving masks, distancing, and ventilation), setting out the basis for their implementation in the school environment.In the presence of increasingly infectious SARS-Cov-2 variants, in-classroom teaching can only be safely maintained through a layered strategy combining multiple protective measures. The precise measures that are needed at any point in time depend

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Section: Ventilation and Air Purificationmentioning

confidence: 99%

Section: Ventilation and Air Purificationmentioning

confidence: 99%

A multi‐layered strategy for COVID ‐19 infection prophylaxis in schools: A review of the evidence for masks, distancing, and ventilation

et al. 2022

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“…A similar study has been done in Nanjing, a typical hot-summer and cold-winter city in China, as described by Fu and Wu. 66 Those authors considered a hybrid ventilation building (natural ventilation and mechanical ventilation), similar to the AMVIC building treated in this paper. They report results for a summer month (July), as we are doing in the present work.…”

Section: Comparison Between the Three Types Of Shading Devicesmentioning

confidence: 99%

Usage of solar shading devices to improve the thermal comfort in summer in a Romanian PassivHaus

Udrea

Badescu

2019

SIMULATION

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The global trend is to increase the thermal comfort in all kinds of buildings, residential and non-residential. At the same time, minimization of energy consumption and improved building sustainability must be achieved. Only precise calculations can keep the balance between maximizing comfort and minimizing energy consumption. The PassivHaus (PH) is a special type of building with low heating energy consumption that fulfills special requirements defined by the Passivhaus Institut of Darmstadt, Germany. The PassivHaus concept has been successfully implemented in climates other than that of Germany. However, current practice in Southern European countries shows that PHs may exhibit overheating in the hot season, a phenomenon which is not very often encountered in Germany. Shading devices may be considered in these southern countries to improve the thermal comfort in PHs during summer. A model of the AMVIC PH office building located near Bucharest, Romania, has been developed using Simergy and EnergyPlus software. The model was validated and calibrated using measured data during summer. Measurements have been used to estimate the classical thermal comfort indices such as predicted mean vote and predicted percent of dissatisfied. Simulations have been performed to study the effect on thermal comfort of several shading devices, such as exterior blinds, exterior shades, and overhangs. Exterior blinds and exterior shades are generally more efficient than overhangs when the results are discussed with reference to transmitted solar energy flux through the windows.

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“…Therefore, hybrid ventilation, which is the combination between natural and mechanical ventilation, represents a worthy strategy to achieve energy efficiency, thermal comfort, and satisfying IAQ (Yoshino et al, 2003;Tovar et al, 2007). Indeed, buildings equipped with hybrid ventilation systems can achieve significant reductions of energy needs and CO 2 levels compared with conventional air conditioning designs (Fu and Wu, 2015). Different hybrid ventilation control strategies can be found in several studies.…”

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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Comparison of the Efficiency of Building Hybrid Ventilation Systems with Different Thermal Comfort Models

Cited by 18 publications

References 17 publications

A multi‐layered strategy for COVID ‐19 infection prophylaxis in schools: A review of the evidence for masks, distancing, and ventilation

A multi‐layered strategy for COVID ‐19 infection prophylaxis in schools: A review of the evidence for masks, distancing, and ventilation

Usage of solar shading devices to improve the thermal comfort in summer in a Romanian PassivHaus

Optimizing Hybrid Ventilation Control Strategies Toward Zero-Cooling Energy Building

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