Holistic approach for energy retrofit with volumetric add-ons toward nZEB target: Case study of a dormitory in Athens

Assimakopoulos, Margarita-Niki; Masi, Rosa Francesca De; Fotopoulou, Anastasia; Papadaki, Dimitra; Ruggiero, Silvia; Semprini, Giovanni; Vanoli, Giuseppe Peter

doi:10.1016/j.enbuild.2019.109630

Cited by 32 publications

(20 citation statements)

References 22 publications

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“…The improvement of the passive solar intervention scenario resulted in a reduction of the heating load between 57.7 % and 59.5 %. Similar research (Assimakopoulos et al 2020) for the city of Athens resulted in a range of heating load demand reduction between 35 % and 60 % according to the examined floor. For the cooling load demand the current research resuted in a reduction between 51.1 % and 53.1 %.…”

Section: Comparative Assessment Of the Energy Efficiency Of The Interventionssupporting

confidence: 65%

Energy and Aesthetic Upgrading Interventions: Assessing Urban Block Renovation Scenarios

Tsirigoti

Zenginis

Bikas

2021

sace

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The target towards carbon neutral cities emerges as a new way to mitigate the environmental pollution and the indisputable climate change, but it can also be the chance for the overall improvement of the quality of life by promoting the upgrading of the often low aesthetic quality of the urban environments. The objective of the research is to investigate renovation strategies at the city scale that will not only reduce the energy demand, but they will also promote the improvement of the city’s aesthetics. Two different typologies of urban block forms of the Greek city are examined, and four scenarios of renovation interventions are analysed according to energy and aesthetic criteria. The heating and cooling load demand is calculated through simulations for the four renovation scenarios which include: The improvement of the thermal insulation of the building’s shells. The use of phase change materials. The construction of green roofs. The integration of passive solar and shading systems. The findings of the research prove that the energy interventions at the urban block scale can define the degree of efficiency in the energy performance level without compromising aesthetics, as the added value resulting from higher aesthetics is a basic criterion for the overall improvement of the quality of life.

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Section: Comparative Assessment Of the Energy Efficiency Of The Interventionssupporting

confidence: 65%

Energy and Aesthetic Upgrading Interventions: Assessing Urban Block Renovation Scenarios

Tsirigoti

Zenginis

Bikas

2021

sace

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“…Natural gas requirements reproduction is slightly underestimated in the colder months (December-February), instead, it exceeds the recorded values in the intermediate months. Overall the proposed model can be considered well calibrated on the basis of the prescriptions reported in [4,26]. Table 5 lists an overview of the calibration indexes for both gas and electricity with the corresponding ranges of acceptability.…”

Section: Simulation Results and Comparison With Measured Datamentioning

confidence: 99%

“…The world's energy demand has increased from 1971 to 2014 by 92% according to the International Energy Agency (IEA), with the building sector contributing to a large portion of this increase. In fact, the building sector attributed more than 30% of the global greenhouse gas emissions [1,2] and 40% of total energy consumption [3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

A Holistic Approach for Energy Renovation of the Town Hall Building in a Typical Small City of Southern Italy

et al. 2020

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The reduction of buildings energy demand represents one of the main goals in developed countries in order to achieve a sustainable future. In Italy a significant number of public administration offices are located in historical buildings, especially in small provincial towns. In this paper the analysis of the energy and environmental effects deriving from the plant renovation of the Palazzo San Giorgio, the building offices of the municipality of Campobasso (Southern Italy), is carried out. The simulation model of the building-plant system has been implemented with the TRNSYS software using data collected in the survey campaign. It has been calibrated on the basis of the billed electricity and gas consumption and then, further used to evaluate the reduction of the building primary energy demands and CO2 emissions deriving from some non-invasive energy refurbishment measures: led lighting, thermostatic valves, cogeneration system and photovoltaic plant. The latter was considered in two variants: the first one provides a system completely integrated into the roof, the second one high efficiency non-integrated panels. The interventions have been evaluated both individually and combined. A primary energy saving of about 47% and a reduction in CO2 emissions of 73% are obtained with the best combined renovation action.

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“…Through the retrofitting process, the external wall of building has been insulated by the cross-laminated panels (X-LAM) with mineral wool insulation and the single glazed windows have been replaced by a triple glazed type with low-emittance coating (Low-E) and spectral selective characteristics. More information on retrofitting process can be found in [18]. The room has been furnished with two beds, two side-bed tables, a desk and chairs, and a large closet.…”

Section: Physical Modelmentioning

confidence: 99%

Numerical Study on Indoor Environmental Quality in a Room Equipped with a Combined HRV and Radiator System

Jahanbin

Semprini

2020

Sustainability

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Heat recovery ventilation (HRV) systems can be integrated with an additional air heater in buildings with low energy demand in order to cover space heating demand. The employment of coupled HRV-heater systems is, therefore, gaining increasing interest for the improvement of the indoor environmental quality (IEQ), as well as the reduction of ventilation energy loss. The present paper analyses the efficacy of a HRV system, coupled with a low-temperature radiator, in satisfying the IEQ indices inside a retrofitted dormitory room. A computational fluid dynamic (CFD) model based on the finite volume method is established to investigate IEQ characteristics including indoor air quality and thermal comfort condition. The presented CFD code provides a practical tool for a comprehensive investigation of the IEQ indices in spaces employing a coupled HVAC system. In an analysis of indoor air quality, parameters such as age of the air, air change efficiency, and ventilation efficiency in removal of gaseous contaminants, namely VOCs and CO2, are evaluated. The results obtained by the numerical model allow addressing the interaction between HRV and radiator systems and its effects on airflow field. The results show the decrease of the indoor operative temperature with increment of the supply air flow rate, which is mainly due to the decreased thermal efficiency of the HRV system. The obtained results indicate that, while higher ventilation rates can significantly decrease the age of the air and gaseous contaminants level, at the same time, it would cause a local discomfort in some parts of the room.

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Holistic approach for energy retrofit with volumetric add-ons toward nZEB target: Case study of a dormitory in Athens

Cited by 32 publications

References 22 publications

Energy and Aesthetic Upgrading Interventions: Assessing Urban Block Renovation Scenarios

Energy and Aesthetic Upgrading Interventions: Assessing Urban Block Renovation Scenarios

A Holistic Approach for Energy Renovation of the Town Hall Building in a Typical Small City of Southern Italy

Numerical Study on Indoor Environmental Quality in a Room Equipped with a Combined HRV and Radiator System

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