Abstract

The household sector in Poland consumes more than 25% of final energy. At the same time, residents reported dissatisfaction with the thermal conditions during the summer months. This paper details the search for passive and energy-efficient solutions to improve thermal comfort in Polish dwellings. A five-story, multi-family building was selected for this research. Analyses were conducted in apartments located on the top two floors using EnergyPlus (for thermal calculations) and CONTAM (for air exchange calculations) simulation programs for current and future climatic conditions. The stochastic behavior of people when opening windows and automatically controlled systems supplying external air to the building was considered. Airing the apartments by opening windows increased the heating demand but reduced the number of thermal discomfort hours by over 90%. The degree of airing by opening windows depends on residents opening their windows; therefore, a mechanical supply of external air controlled by both internal and external temperatures was proposed and tested.

Highlights

  • Current trends in the construction sector seek to improve building energy efficiencies.The housing sector consumes up to 25% of final energy [1]

  • This study analyzed the influence of ventilation cooling on a multi‐fa and used external airflow to improve the indoor thermal conditions and c nual heat demand for dwellings of this type

  • Version.both program modeled airflowFigure simulations utilized programs, EnergyPlus is in this study due to its simplicity and the lack of some airflow model elements in AFN, available in CONTAM

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Summary

Introduction

Current trends in the construction sector seek to improve building energy efficiencies. It is important to understand the impact of climate change on the risk of overheating, because as reports on the condition of large-panel construction in Poland [27] show, the technical condition of buildings is good and these facilities will remain in use for the several dozen years. The results from this analysis should lead to the development of appropriate strategies to combat overheating in buildings. Its energy requirements are low compared to air conditioning systems (e.g., splits)

Methods
Thermal
Ventilation Model
Closed Windows
Gravitational
Controlling the Opening of Windows—Stochastic
Initial Restrictions
Restrictions in Window Control Regarding Time
Restrictions in Window Control Regarding Opening Degree
Additional Restrictions
Optimization
Case Studies
Results
Conclusions

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