The Impact of Building Parameters and way of Operation on the Operative Temperature in Rooms

Kaczmarczyk, Jan; Ferdyn-Grygierek, Joanna; Baranowski, A.

doi:10.21307/acee-2018-028

Cited by 3 publications

(5 citation statements)

References 11 publications

(9 reference statements)

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“…environments in accordance with the EN 16798-1:2019 standard [42], for which the operative temperature was 20 °C. The average difference between the air temperature and the operative temperature was assumed to be 1 K [54].…”

Section: Internal Heat Gainsmentioning

confidence: 99%

“…It was assumed that flats were 21 • C (whole day), staircases were 16 • C (whole day), and that basements had no heating. The assumption was made for category II thermal environments in accordance with the EN 16798-1:2019 standard [42], for which the operative temperature was 20 • C. The average difference between the air temperature and the operative temperature was assumed to be 1 K [54].…”

Section: Indoor Temperaturementioning

confidence: 99%

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Ventilation Methods for Improving the Indoor Air Quality and Energy Efficiency of Multi-Family Buildings in Central Europe

Ferdyn-Grygierek,

Grygierek

2024

Energies

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In Poland and other countries in Central Europe, residential buildings from the second half of the 20th century dominate, which have recently undergone deep thermomodernisation. Research on the retrofitting of residential buildings has focused mainly on energy efficiency, with only a few studies on indoor air quality. The aim of this study was to present a comparative analysis of the impact of five ventilation scenarios (three natural and two mechanical) on CO2 concentration and energy demand for heating and ventilation in residential spaces of a multi-family building located in Poland. The analyses were based on the results of building performance co-simulation using the EnergyPlus and CONTAM programs carried out under dynamic conditions with a 5 min time step for the entire heating season. The calculations took into account the instantaneous occupancy variability of twenty apartments. In the buildings equipped with new tight windows, the natural ventilation system provided extremely low air exchange (on average 0.1 h−1) and poor indoor air quality (average CO2 concentration at the level of 2500 ppm). Opening windows to ventilate the rooms generated a multiple increase (up to 8 times) in heating demand during these periods, but average CO2 concentration was on the level of 930 ppm. The use of mechanical ventilation was profitable both in terms of energy savings (at the level of 50%) and improvement in the indoor air.

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Section: Internal Heat Gainsmentioning

confidence: 99%

Section: Indoor Temperaturementioning

confidence: 99%

Ventilation Methods for Improving the Indoor Air Quality and Energy Efficiency of Multi-Family Buildings in Central Europe

Ferdyn-Grygierek,

Grygierek

2024

Energies

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“…The value of the operative temperature differs from the indoor air temperature because it takes into account the thermal radiation of the surrounding building partitions. Research on this topic can be found in the work of Kaczmarczyk et al [47].…”

Section: Thermal Comfort Modelmentioning

confidence: 99%

“…As mentioned earlier in the adaptive model, the operative temperature occurred, while the cooling devices are controlled by the air temperature. In this study, according to the literature [47], it was assumed that the air temperature was 1.5 • C lower than the operative temperature. Instantaneous values of the air temperature set-point (theoretical comfort air temperature line) were calculated for the entire year as instantaneous operative temperature determined according to EN 16798-1:2019 [44] with the assumed offset.…”

Section: Case Studiesmentioning

confidence: 99%

Effects of Climate Change on Thermal Comfort and Energy Demand in a Single-Family House in Poland

2021

Self Cite

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In regions with temperate climates, the thermal insulation of buildings is increased to reduce the need for heating. It might significantly reduce human thermal comfort in the summer period. The problem can increase with global warming. The aim of the paper is to analyze the heating and cooling demand, as well as thermal comfort in a single-family house located in Poland for three climate scenarios (typical, real, and future weather data) and for two types of thermal insulation of external walls. In the study, two ways of cooling the building were taken into account: using split air conditioners and using fresh airflow provided through the opening of windows. The open area and the temperatures for opening windows have been optimized using a two-criteria function. The energy simulation was carried out in EnergyPlus 9.4 software. The multi-zone model was validated on the basis of the temperature measurement. The results showed that there will be a problem with ensuring thermal comfort in the future, especially in well-insulated buildings. The energy demand for cooling will be greater than the demand for heating. The use of passive cooling is a good solution for residential buildings in these regions, and the number of discomfort hours is small (max 5%).

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“…The seasonal heat demand in buildings based on short measurement periods was presented in [28][29][30]. Indoor environmental conditions were analyzed focusing on the operative temperature and air quality [31,32]. The analysis of the building's insulation condition was examined in terms of determining seasonal heat consumption [33][34][35].…”

Section: Introductionmentioning

confidence: 99%

Case Study of Thermal Diagnostics of Single-Family House in Temperate Climate

et al. 2019

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Reduction of the primary energy consumption is a crucial challenge for the building sector due to economic and environmental issues. Substantial savings could be achieved within the household. In this paper, we investigate the energy performance of a single-family house located in the temperate climate. The assessment is based on the comprehensive thermal diagnostic of the building performed on-site and via computational analyses. The on-site measurements included diagnostics of the building envelope, heat source, heating and domestic hot water system, ventilation system, and indoor environmental quality. Analyses confirmed that the studied building, which was built in 2008, meets the legislation requirements for the primary energy usage at that time and nowadays. However, results show discrepancies between energy performance obtained through on-site measurements and computational methods following regulations. Partially, discrepancies are a result of differences on normative values and how the building is operated in practice. It is also showed how important the role in the assessment of energy consumption through measurements is played by the measurement period.

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The Impact of Building Parameters and way of Operation on the Operative Temperature in Rooms

Cited by 3 publications

References 11 publications

Ventilation Methods for Improving the Indoor Air Quality and Energy Efficiency of Multi-Family Buildings in Central Europe

Ventilation Methods for Improving the Indoor Air Quality and Energy Efficiency of Multi-Family Buildings in Central Europe

Effects of Climate Change on Thermal Comfort and Energy Demand in a Single-Family House in Poland

Case Study of Thermal Diagnostics of Single-Family House in Temperate Climate

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