Climatic potential for passive cooling of buildings by night-time ventilation in Europe

Artmann, Nikolai; Manz, Heinrich; Heiselberg, Per

doi:10.1016/j.apenergy.2006.05.004

Cited by 233 publications

(124 citation statements)

References 5 publications

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“…Within them, the climatic conditions of 24 cities were chosen for their representativeness. To further filter the selection, three indicators were used as reference: the Winter Severity Index and the Summer Severity Index proposed by F. Sanchez de la Florthe (2006) and the Climatic Cooling Potential developed by Artmann et al (2007). These indexes were calculated for all cities (Fig.…”

Section: Selecting the Eu Reference Climatesmentioning

confidence: 99%

Identification of cost-optimal and NZEB refurbishment levels for representative climates and building typologies across Europe

et al. 2017

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The energy consumptions of the building stock are playing a central role in the energy policy of the European Union. While the Member States are applying the Directives in force, the European Commission is working to update the regulatory framework. Specifically, it is necessary to achieve the great unrealized potential for energy savings in existing buildings. With this aim, the nearly zero-energy building (NZEB) target was introduced, and a comparative methodology framework to calculate cost-optimal levels of minimum energy performance requirements was proposed. This study focuses on the issue of building renovation, and it presents the results obtained with the application of a cost-optimal calculation method for identifying proper retrofit measures to reach costoptimal levels and NZEB levels. The assessment takes into account an exhaustive set of passive and active renovation options and it was extended to various building types of 60s-70s (residential and non-residential) in a wide range of representative European climatic conditions. A very relevant energy-saving potential was found for all cost-optimal benchmarks, and in many cases, the obtained NZEB refurbishments have resulted interesting also from an economic point of view.

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Section: Selecting the Eu Reference Climatesmentioning

confidence: 99%

Identification of cost-optimal and NZEB refurbishment levels for representative climates and building typologies across Europe

et al. 2017

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“…If direct ventilative cooling is not useful for more than an hour during the occupied time, the night-time CCP over the following night is evaluated using the method described in Artmann et al (2007). Night-time ventilation is calculated by assuming that the thermal capacity of the building mass is sufficiently high and therefore all the exceeding internal gains can be stored in the building mass.…”

Section: Evaluation Criteriamentioning

confidence: 99%

“…The existing methods (Artmann, Manz, & Heiselberg, 2007;Ghiaus, 2003) for climatic cooling potential (CCP) evaluation are based on degree-hours approaches. Degree-hours approaches rely on indoor and outdoor temperature gradients on hourly basis.…”

Section: Introductionmentioning

confidence: 99%

“…Artmann et al (2007) assumes the building temperature to oscillate harmonically according to a predefined function to simulate the dynamic effect of heat storage in the structure materials. Emmerich, Polidoro, and Axley (2011) suggest to use the balance point temperature defined as the outdoor air temperature at which the total heat gains equal the total loss.…”

Section: Introductionmentioning

confidence: 99%

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Evaluation tool of climate potential for ventilative cooling

Belleri

Avantaggiato

Psomas

et al. 2017

International Journal of Ventilation

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The ventilative cooling potential tool (VC tool) aims at assessing the potential effectiveness of ventilative cooling strategies by taking into account also building envelope thermal properties, occupancy patterns, internal gains and ventilation needs. The analysis is based on a singlezone thermal model applied to user-input climatic data on hourly basis. For each hour of the annual climatic record of the given location, an algorithm identifies over the occupied time the number of hours when ventilative cooling is useful and estimates the airflow rates needed to prevent building overheating. As validation of results, the ventilative cooling potential tool outputs are compared with the predictions of a building energy simulation model of a reference room in two different climates. The VC tool is particularly suitable for early design phases, providing building designers with useful information about the level of ventilation rates needed to offset given rates of internal heat gains.

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“…The interest for this concept has grown during the last few decades due to an increase of the cooling demand in buildings [12,13]. Artmann et al Subscripts cond conduction conv convection rad radiation tot total i or j surface i or j [14] have analyzed the climatic data in Europe and concluded that there is a high potential for night-time ventilation for the whole Northern Europe and a significant potential in Central, Eastern and even some regions of Southern Europe. But due to climate warming, the cooling potential might decrease and might be shifted from summer to transitions seasons [15].…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of convective heat transfer during night cooling with different ventilation systems and surface emissivities

Dréau

Heiselberg

Jensen

2013

Energy and Buildings

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a b s t r a c tNight-time ventilation is a promising approach to reduce the energy needed for cooling buildings without reducing thermal comfort. Nevertheless actual building simulation tools have showed their limits in predicting accurately the efficiency of night-time ventilation, mainly due to inappropriate models for convection. In a full-scale test room, the heat transfer was investigated during 12 h of discharge by nighttime ventilation. A total of 34 experiments have been performed, with different ventilation types (mixing and displacement), air change rates, temperature differences between the inlet air and the room, and floor emissivities. This extensive experimental study enabled a detailed analysis of the convective and radiative flow at the different surfaces of the room. The experimentally derived convective heat transfer coefficients (CHTC) have been compared to existing correlations. For mixing ventilation, existing correlations did not predict accurately the convective heat transfer at the ceiling due to differences in the experimental conditions. But the use of local parameters of the air flow showed interesting results to obtain more adaptive CHTC correlations. For displacement ventilation, the convective heat transfer was well predicted by existing correlations. Nevertheless the change of floor emissivity influenced the CHTC at the surface of interest.

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Climatic potential for passive cooling of buildings by night-time ventilation in Europe

Cited by 233 publications

References 5 publications

Identification of cost-optimal and NZEB refurbishment levels for representative climates and building typologies across Europe

Identification of cost-optimal and NZEB refurbishment levels for representative climates and building typologies across Europe

Evaluation tool of climate potential for ventilative cooling

Experimental investigation of convective heat transfer during night cooling with different ventilation systems and surface emissivities

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