Energy Performance and Economic Feasibility Study of Historical Building in the City of Matera, Southern Italy

Rospi, Gianluca; Cardinale, Nicola; Negro, Elisabetta

doi:10.3390/en10122009

Cited by 17 publications

(13 citation statements)

References 10 publications

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“…It is important to highlight that the simulations tools employed in this research are highly recommended by several international and renowned standards, which have been greatly used in several scientific investigations [41][42][43][44][45][46]. Accordingly, the simulation tools accuracy supports the results reliability of the energy efficiency of the building in its original state, without thermal insulation materials, and the results of the energy efficient version, demonstrating thus the effectiveness of the strategies implemented for the climate under analysis.…”

mentioning

confidence: 59%

A Parametric Study and Performance Evaluation of Energy Retrofit Solutions for Buildings Located in the Hot-Humid Climate of Paraguay—Sensitivity Analysis

2019

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Nowadays, awareness concerning the need to use energy efficiently is increasing significantly worldwide, thus, improving the energy efficiency levels in the building sector has acquired high importance because of their energy saving potential. However, several intervention options are available to achieve high energy efficiency levels in buildings, and the choice must be made considering the efficiency of the solution and the costs involved. Considering this, the present research aimed to develop a parametric study of several energy retrofit solutions for buildings located in the hot-humid climate of Paraguay, in order to analyse their efficiency in terms of comfort rates and cooling energy needs. Furthermore, the Analytic Hierarchy Process (AHP) is employed as a decision-making method to choose the most suitable intervention considering the investment costs required. Thus, threshold values of thermal transmittance for the building thermal envelope components are established through a parametric study and sensitivity analysis of the simulations results. Considering that Paraguay does not have national building energy codes, the outcomes of this research will constitute a support and contribute for the thermal parameters regulation of buildings aiding to improve the energy efficiency of Paraguayan buildings.A parametric study is developed in this research, in which dynamic energy simulations of a building performed using the EnergyPlus software and DesignBuilder interface. The weather data employed is the default one available in DesignBuilder for Asunción (Paraguay). The weather station corresponds to the Silvio Pettirossi airport, and the dataset cover a period of 18 years, from 1982 to 1999 for most stations. These hourly weather data are 'typical' data derived from hourly observations which correspond to a record of multiple years, where each selected month is representative of that month for the period of record [21]. The parameters used as evaluation indicators were operative temperature (T op ), which is employed to determine the discomfort rates, and the energy requirement of the thermal zone under analysis. The internal and external surface temperatures (T si . and T se , respectively), and the heat transfer through the building's envelope are also studied.The discomfort rate is computed considering two methods: the former, according to the acceptable indoor operative temperatures for buildings in the Category II of the standard EN 15251 for the design of buildings without mechanical cooling systems [22], which employs the adaptive method [23]; and the latter, applying the statistic method, using fixed threshold values of comfort temperature. This approach was already adopted for the thermal comfort assessment of buildings by several scientific research [24][25][26][27][28][29].In order to set the fixed range for the city of Asunción, which does not have a national standard energy code, a scientific literature analysis was performed. The static models usually set fixed thresholds values of comfort tempera...

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confidence: 59%

A Parametric Study and Performance Evaluation of Energy Retrofit Solutions for Buildings Located in the Hot-Humid Climate of Paraguay—Sensitivity Analysis

2019

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“…Nevertheless, it should be underlined that the real outcomes obtained from the data measured for specific buildings can show significant differences from the expected and estimated energy savings. Therefore, some research and experimental validations with real buildings as case studies have been conducted by different research teams, presenting data analyses and comparisons [44]. In [41] Beccali et al conclude that the BACS factors method can be used with sufficient precision to evaluate the energy consumption of C or A BACS classes' lighting systems, both in residential and non-residential buildings.…”

Section: An Expected Impact Of the Bacs Lighting Control Functions Onmentioning

confidence: 99%

“…There are two laboratory rooms, two offices, and a corridor on the floor considered in the case study for this paper. as case studies have been conducted by different research teams, presenting data analyses and comparisons [44]. In [41] Beccali et al conclude that the BACS factors method can be used with sufficient precision to evaluate the energy consumption of C or A BACS classes' lighting systems, both in residential and non-residential buildings.…”

Section: Case Study-experimental Building and Control Systemmentioning

confidence: 99%

Lighting Control Including Daylight and Energy Efficiency Improvements Analysis

Kaminska

Ożadowicz

2018

Energies

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Energy used for lighting is one of the major components of total energy consumption in buildings. Nowadays, buildings have a great potential to reduce their energy consumption, but to achieve this purpose additional efforts are indispensable. In this study, the need for energy savings evaluation before the implementation of lighting control algorithms for a specified building is highlighted. Therefore, experimental tests have been carried out in a university building with laboratories and other rooms, equipped with KNX building automation system. A dimmable control strategy has been investigated, dependent on daylight illuminance. Moreover, a relationship between external and internal daylight illuminance levels has been evaluated as well. Based on the experimental results, the authors proposed a method for the rough estimation of electrical energy savings. Since, according to the EN 15232 standard, Building Automation and Control Systems (BACS) play an important role in buildings’ energy efficiency improvements, the BACS efficiency factors from this standard have been used to verify the experimental results presented in the paper. The potential to reduce energy consumption from lighting in non-residential buildings by 28% for offices and 24% for educational buildings has been confirmed, but its dependence on specific building parameters has been discussed as well.

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“…At international level it is clear that a certain level of knowledge of the energetic behaviour of historical buildings has not yet been acquired, nor are there any agreements on performance improvement strategies that take into account the values of cultural, historical, architectural, technical and construction heritage [15,16]. Therefore, the development of a correct energy analysis can help to identify the best rehabilitation solutions that are compatible, respectful of the values to be conserved and that can guarantee user comfort and energy efficiency [17,18].…”

Section: Introductionmentioning

confidence: 99%

Thermal Transmittance Measurements of the Historical Masonries: Some Case Studies

Rotilio¹,

Cucchiella²,

Berardinis³

et al. 2018

Energies

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The background shows that intervention on historical walls highlights the difficulty of identifying design solutions that are effective and compatible due to the lack of specific data on the thermal characteristics of the specific contexts investigated. This determines the choice of design solutions that are frequently inadequate and unsustainable from an environmental and economic point of view. Starting from acquired data a methodology has been developed that is based on in situ experimental investigations able to return the most probable value of transmittance of the historical walls. The values measured on the samples analysed do not reflect the literature data. For some of the samples analysed, the measured transmittance is lower than the one recorded in literature of about 10–15%. For the remaining ones, there are no reference values. The importance of an in-depth knowledge of the real behaviour of an existing historical envelope of a building is therefore fundamental, given that any evaluation mistake can have serious consequences from both an economic and environmental point of view. Underestimating the transmittance of a wall implies a waste in the use of available resources but also the disposal of greater quantities of building materials in relation to the end of life. The developed methodology can be easily replicated in other contexts and extended to all building elements that make up the historical envelope. The study will be continued by analysing further samples in order to create a reference knowledge database accessible to researchers, professionals and organizations.

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Energy Performance and Economic Feasibility Study of Historical Building in the City of Matera, Southern Italy

Cited by 17 publications

References 10 publications

A Parametric Study and Performance Evaluation of Energy Retrofit Solutions for Buildings Located in the Hot-Humid Climate of Paraguay—Sensitivity Analysis

A Parametric Study and Performance Evaluation of Energy Retrofit Solutions for Buildings Located in the Hot-Humid Climate of Paraguay—Sensitivity Analysis

Lighting Control Including Daylight and Energy Efficiency Improvements Analysis

Thermal Transmittance Measurements of the Historical Masonries: Some Case Studies

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