Estimating the impact of heat accounting on Italian residential energy consumption in different scenarios

Canale, Laura; Dell’Isola, Marco; Ficco, Giorgio; Pietra, Biagio Di; Frattolillo, Andrea

doi:10.1016/j.enbuild.2018.03.040

Cited by 30 publications

(13 citation statements)

References 23 publications

(31 reference statements)

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“…Apart from new constructions, the strategic challenge in view of the reduction of the energy consumption of the building sector is the energy retrofit of the existing buildings [9][10][11][12][13]. This is even more important in countries (like Italy) characterized by a huge percentage (roughly 70%) of buildings built before any regulatory indication on building energy efficiency [14][15][16] and then without any carefulness to the ventilation issues.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Ventilation Strategies on Indoor Air Quality and Energy Consumptions in Classrooms

et al. 2019

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Most of the school buildings in Italy are high energy-demanding buildings with no ad-hoc ventilation systems (i.e., naturally-ventilated buildings). Therefore, reducing the heat losses of schools represent the main aspect to be dealt with. Nonetheless, the indoor air quality of the building should be simultaneously considered. Indeed, to date, energy consumptions and air quality are considered as incompatible aspects especially in naturally-ventilated buildings. The aim of the present paper is to evaluate the effect of different ventilation and airing strategies on both indoor air quality and energy consumptions in high energy-demanding naturally-ventilated classrooms. To this purpose, an Italian test-classroom, characterized in terms of air permeability and thermophysical parameters of the envelope, was investigated by means of experimental analyses and simulations through CO2 mass balance equation during the heating season. The air quality was assessed in terms of indoor CO2 concentrations whereas the energy consumptions were evaluated through the asset rating approach. Results clearly report that not adequate indoor CO2 concentrations are measured in the classroom for free-running ventilation scenarios even in low densely populated conditions (2.2 m2 person−1), whereas scheduled airing procedures can reduce the indoor CO2 levels at the cost of higher energy need for ventilation. In particular, when airing periods leading to the air exchange rate required by standards are adopted, the CO2 concentration can decrease to values lower than 1000 ppm, but the ventilation losses increase up to 36% of the overall energy need for space heating of the classroom. On the contrary, when the same air exchange rate is applied through mechanical ventilation systems equipped with heat recovery units, the ventilation energy loss contribution decreases to 5% and the overall energy saving results higher than 30%. Such energy-saving was found even higher for occupancy scenarios characterized by more densely populated conditions of the classroom typically occurring in Italian classrooms.

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Section: Introductionmentioning

confidence: 99%

The Effect of Ventilation Strategies on Indoor Air Quality and Energy Consumptions in Classrooms

et al. 2019

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“…, 0 2019) E3S Web of Conferences https://doi.org/10.1051/e3sconf /2019 ( 110 1100 -2018 10 10 SPbWOSCE Significant heat savings are achieved with the implementation of the correction of the heat supply schedule, depending on the deviation of the internal air temperature in buildings from the set values. The schedule of the choice of the heating carrier parameters depending on the change in the outside temperature is realized provided that the average temperature in the premises does not deviate from the setpoint (+21°C).…”

Section: Resultsmentioning

confidence: 99%

“…As a result, the thermal insulation of the pipelines was of very poor quality, the drainage was blocked and did not fulfill its function of preventing the flooding of networks, and the heating points in the buildings were not equipped with efficient systems for supplying heat to heating. The control of heat supply system depending on changes in the outdoor temperature was carried out centrally at the source [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Energy-efficient multi-loop heating systems for multi-apartment residential buildings

Benuzh

Fedorov

2019

E3S Web Conf.

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The paper analyzes the connection diagrams and operation of buildings heat supply systems, taking into account the impact of changing weather and climate influences during the heating season. High-quality central heat consumption control was carried out, at which the heating carrier flow rate was maintained at a constant level, and its temperature varied according to a predetermined schedule. Thermal characteristics or mode of operation of the building differed from the data set in the schedule, as a result, more heat was consumed in certain periods. Its overrun was also observed during the warm period of the heating season, when, due to the maintenance of the hot water temperature at the right level on the outlet from the water-heaters, the heating carrier from the source was supplied with a temperature exceeding the established norms. The results of field tests and the diagrams of heat supply for heating at the heat supply operation in central heating points are presented. The main accent is made on the study of multi-circuit heating systems with frontal control of heat supply.

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“…For simplicity reasons, for classification of smart metering and sub-metering devices, the authors will refer to the "typical" (i.e., more widespread) configuration of technical plants supplying residential buildings in Italy [21,22]: (i) heating system, consisting of a centralized or autonomous boiler supplied by natural gas for the production of hot water and of heating, through a hydronic system with radiators/fan coils emitters; (ii) electrical system, for the electricity consumed inside the apartment by all the installed electrical appliances and devices and lighting systems; (iii) natural gas system, supplying the main boiler and the cooking appliances. Following the above-described classification, metering and sub-metering of the heating system allow the control and monitoring of energy consumption of heating and domestic hot water [23][24][25][26][27][28]. At the metering level, the smart direct thermal energy meter directly measures the consumptions of the boiler for heating and hot water production services at the building level.…”

Section: Level 1: Smart Metering and Sub-metering Systemsmentioning

confidence: 99%

An IoT Integrated Tool to Enhance User Awareness on Energy Consumption in Residential Buildings

et al. 2019

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Unaware behaviors of occupants can affect energy consumption even more than incorrect installations and building envelope inefficiencies, with significant overconsumptions widely documented. Real time data and an effective and frequent billing of actual consumptions are required to reach an adequate awareness of energy consumption. From this point of view, the European Directive 2012/27/EU already imposed the use of metering and sub-metering systems, setting the minimum criteria for billing and related information based on real energy consumption data. To assess the ability of buildings to exploit new information and communication technologies (ICT) and sensitize both landlords and tenants to related savings, the new European Directive 2018/844/EU promotes the use of a smart readiness indicator. At the same time, basic information about indoor thermal comfort should be also gathered, aimed at avoiding that an excessive saving tendency can determine the onset of issues related to excessively low internal temperatures. In this paper, the authors address the problem of gathering, processing, and transmitting energy consumption and basic indoor air temperature data in the framework of an Internet of Things (IoT) integrated tool aimed at increasing residential user awareness through the use of consumption and benchmark indexes. Two case-studies in which thermal and electrical energy monitoring systems have been tested are presented and discussed. Finally, the suitability of the communication of energy consumption in terms of temporal, spatial, and typological aggregation has been evaluated.

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Estimating the impact of heat accounting on Italian residential energy consumption in different scenarios

Cited by 30 publications

References 23 publications

The Effect of Ventilation Strategies on Indoor Air Quality and Energy Consumptions in Classrooms

The Effect of Ventilation Strategies on Indoor Air Quality and Energy Consumptions in Classrooms

Energy-efficient multi-loop heating systems for multi-apartment residential buildings

An IoT Integrated Tool to Enhance User Awareness on Energy Consumption in Residential Buildings

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