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Dr. Tomasz Kisilewicz
Chair of Building Design and Building Physics, Faculty of Covil Engineering, Cracow University of Technology, Kraków, Poland

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0 Air Quality
0 Building Physics
0 Low energy buildings
0 Passive solar use
0 Internal environment quality

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Journal article
Published: 25 December 2020 in Energies
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The heatwaves that have affected our civilization in recent years pose a serious threat to the environment as well as the proper functioning of our bodies. Schools are facilities with specific microclimatic requirements. Thermal conditions in educational buildings are decisive for the stimulation and efficiency of the learning process, as well as the interaction of students. Based on the measurements of thermal comfort carried out in the school building, with the energy standard of a passive building, it can be observed that in schools with very low energy consumption, the problem of interior overheating may occur in the summer months. In this paper, an attempt was made to search for alternative passive measures allowing for the required indoor microclimate conditions to be obtained. Such solutions are in line with the spirit of the European energy policy and sustainable development. A model of the school under study was created using the Design Builder simulation program. The role of mechanical ventilation and the possibility of night ventilation in reducing discomfort were examined. Consideration was given to the justification of using expensive heat pump installations with a ground heat exchanger to reduce overheating in summer. The application of the adaptive approach to the assessment of thermal conditions and the acceptance of limited overheating periods led to the conclusion that the analyzed building could function successfully without these additional installation elements. A proprietary tool for the analysis of microclimate conditions was proposed to estimate the hours of discomfort in a way that is objective and easy to calculate.

ACS Style

Anna Dudzińska; Tomasz Kisilewicz. Alternative Ways of Cooling a Passive School Building in Order to Maintain Thermal Comfort in Summer. Energies 2020, 14, 70 .

AMA Style

Anna Dudzińska, Tomasz Kisilewicz. Alternative Ways of Cooling a Passive School Building in Order to Maintain Thermal Comfort in Summer. Energies. 2020; 14 (1):70.

Chicago/Turabian Style

Anna Dudzińska; Tomasz Kisilewicz. 2020. "Alternative Ways of Cooling a Passive School Building in Order to Maintain Thermal Comfort in Summer." Energies 14, no. 1: 70.

Journal article
Published: 15 December 2020 in Energies
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Infrared thermography (IRT) has become a commonly applied non-destructive testing method for assessing building envelopes. Like any diagnosis tool, IRT requires an appropriate experience and principle understanding, mainly when the method is used for quantitative analyses. The challenges of the IRT often deal with the dynamic properties of building partitions. Climatic conditions have a certain variability, and the accumulated energy storage in the building components can affect their temperature as well as the calculated thermal performance. This paper aims to analyze how stationary and dynamic regimes of a quantitative IRT test could impact the measured thermal transmittance of heavy multi-leaf walls. Investigation in two European countries with different climatic conditions are reported. In this way, it is discussed which boundary conditions should be guaranteed to provide reliable information about a building envelope using quantitative IRT. In order to check the quality of the measurements, the heat flux meter (HFM) method was also implemented, following the ISO 9869. The research revealed that it could be possible to use short-lasting tests in the climatic conditions of Southern Europe, while long-term tests should be implemented in Northern European countries where climatic conditions are less regular.

ACS Style

Blanca Tejedor; Eva Barreira; Vasco Peixoto De Freitas; Tomasz Kisilewicz; Katarzyna Nowak-Dzieszko; Umberto Berardi. Impact of Stationary and Dynamic Conditions on the U-Value Measurements of Heavy-Multi Leaf Walls by Quantitative IRT. Energies 2020, 13, 6611 .

AMA Style

Blanca Tejedor, Eva Barreira, Vasco Peixoto De Freitas, Tomasz Kisilewicz, Katarzyna Nowak-Dzieszko, Umberto Berardi. Impact of Stationary and Dynamic Conditions on the U-Value Measurements of Heavy-Multi Leaf Walls by Quantitative IRT. Energies. 2020; 13 (24):6611.

Chicago/Turabian Style

Blanca Tejedor; Eva Barreira; Vasco Peixoto De Freitas; Tomasz Kisilewicz; Katarzyna Nowak-Dzieszko; Umberto Berardi. 2020. "Impact of Stationary and Dynamic Conditions on the U-Value Measurements of Heavy-Multi Leaf Walls by Quantitative IRT." Energies 13, no. 24: 6611.

Journal article
Published: 05 March 2020 in Energies
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Latent heat thermal energy storage (LHTES) using phase change materials (PCM) is one of the most promising ways for thermal energy storage (TES), especially in lightweight buildings. However, accurate control of the phase transition of PCM is not easy to predict. For example, neglecting the hysteresis or the effect of the speed of phase change processes reduces the accuracy of simulations of TES. In this paper, the authors propose a new software module for EnergyPlus™ that aims to simulate the hysteresis of PCMs during the phase change. The new module is tested by comparing simulation results with experimental tests done in a climatic chamber. A strong consistency between experimental and simulation results was obtained, while a discrepancy error of less than 1% was obtained. Moreover, in real conditions, as a result of quick temperature changes, only a partial phase transformation of the material is often observed. The new model also allows the consideration of the case with partial phase changes of the PCM. Finally, the simulation algorithm presented in this article aims to represent a better way to model LHTES with PCM.

ACS Style

Anna Zastawna-Rumin; Tomasz Kisilewicz; Umberto Berardi. Novel Simulation Algorithm for Modeling the Hysteresis of Phase Change Materials. Energies 2020, 13, 1200 .

AMA Style

Anna Zastawna-Rumin, Tomasz Kisilewicz, Umberto Berardi. Novel Simulation Algorithm for Modeling the Hysteresis of Phase Change Materials. Energies. 2020; 13 (5):1200.

Chicago/Turabian Style

Anna Zastawna-Rumin; Tomasz Kisilewicz; Umberto Berardi. 2020. "Novel Simulation Algorithm for Modeling the Hysteresis of Phase Change Materials." Energies 13, no. 5: 1200.

Journal article
Published: 18 October 2019 in Energy and Buildings
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The authors present the preliminary results and analyses of research performed in an experimental residential building located in the town of Nyiregyhaza in Hungary. The building is equipped with an innovative system for direct coupling a ground heat exchanger with a wall heat exchanger. In 2012, the creator of the system, Tamas Barkanyi, obtained patent for active thermal insulation of buildings. In this paper, the authors attempt to answer the question of to what extent the active insulation system can replace the commonly used standard passive insulation systems. The initial results of the research lead to the conclusion that active thermal insulation significantly improves the insulation parameters of the external wall. In the analyzed periods, the reduction of the total amount of heat loss through external walls was from 53% in February to 81% in November. The equivalent thermal transmittance Ueq of the analysed wall was dependent upon local climate conditions and amounted to 0.047 W/(m2K) in November and 0.11 W/(m2K) in March, while the standard transmittance value was 0.282 W/(m2K).The obtained positive research results should be the basis for the implementation of an innovative system in NZEB buildings.

ACS Style

Tomasz Kisilewicz; Małgorzata Fedorczak-Cisak; Tamas Barkanyi. Active thermal insulation as an element limiting heat loss through external walls. Energy and Buildings 2019, 205, 109541 .

AMA Style

Tomasz Kisilewicz, Małgorzata Fedorczak-Cisak, Tamas Barkanyi. Active thermal insulation as an element limiting heat loss through external walls. Energy and Buildings. 2019; 205 ():109541.

Chicago/Turabian Style

Tomasz Kisilewicz; Małgorzata Fedorczak-Cisak; Tamas Barkanyi. 2019. "Active thermal insulation as an element limiting heat loss through external walls." Energy and Buildings 205, no. : 109541.

Journal article
Published: 18 February 2019 in Sustainability
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The structure and thermal properties of external walls affect both the thermal conditions inside the building and the energy demand. This applies to the energy requirement for heating as well as cooling. While the relationship between thermal insulation and heating is well-known, the effect of thermal insulation on overheating is not evident. One can find opinions that thick thermal insulation creates a “thermos effect” and significantly deteriorates the comfort conditions during the summer. In order to prove these statements, an office room with south-oriented glazing and a high thermal load from equipment was simulated by means of the Energy Plus program. The reference variant was a two-layer wall made from ceramic blocks and a 10 cm layer of thermal insulation. The duration of overheating in the investigated intensively used office space without window shading was approximately 26 to 29 days per year, depending on the expected comfort acceptance range, while in the case of the not insulated wall, it would be shorter by over 3 days. Increasing the thickness of the thermal insulation layer by up to 30 cm extended the overheating period by 4% to 9%. In relation to the whole simulation period, covering four summer months, this means approximately two extra days of discomfort. The effects of various passive methods of protecting buildings against overheating were also investigated. The use of night ventilation in this facility enables reducing the unfavorable conditions by as much as 31%, or up to 46% of the initial period of overheating. The change of the thermal inertia of a building by replacing the ceramic layer with heavy structural concrete allows a further reduction of the overheating duration by 8% to 9%. When the most effective ways of overheating protection are applied, such as night cooling, even a significant thickening of insulation no longer has any impact on its duration. The results shown above are obviously related to the adopted assumptions. However, on the basis of the conducted analyses, it is possible to reduce concerns relating to excessive insulating the building with respect to overheating. Having an optimal window area with nighttime cooling of buildings, window shading, and the inertial benefits associated with a massive construction are the most important and effective measures of protection against overheating. Efficient thermal insulation of the walls does not conflict with the thermal comfort conditions.

ACS Style

Tomasz Kisilewicz. On the Role of External Walls in the Reduction of Energy Demand and the Mitigation of Human Thermal Discomfort. Sustainability 2019, 11, 1061 .

AMA Style

Tomasz Kisilewicz. On the Role of External Walls in the Reduction of Energy Demand and the Mitigation of Human Thermal Discomfort. Sustainability. 2019; 11 (4):1061.

Chicago/Turabian Style

Tomasz Kisilewicz. 2019. "On the Role of External Walls in the Reduction of Energy Demand and the Mitigation of Human Thermal Discomfort." Sustainability 11, no. 4: 1061.

Journal article
Published: 01 September 2015 in Archives of Civil and Mechanical Engineering
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ACS Style

T. Kisilewicz; A. Dudzińska. Summer overheating of a passive sports hall building. Archives of Civil and Mechanical Engineering 2015, 15, 1193 -1201.

AMA Style

T. Kisilewicz, A. Dudzińska. Summer overheating of a passive sports hall building. Archives of Civil and Mechanical Engineering. 2015; 15 (4):1193-1201.

Chicago/Turabian Style

T. Kisilewicz; A. Dudzińska. 2015. "Summer overheating of a passive sports hall building." Archives of Civil and Mechanical Engineering 15, no. 4: 1193-1201.