Recent Achievements in Research on Thermal Comfort and Ventilation in the Aspect of Providing People with Appropriate Conditions in Different Types of Buildings—Semi-Systematic Review

Ratajczak, Katarzyna; Amanowicz, Łukasz; Pałaszyńska, Katarzyna; Pawlak, Filip; Sinacka, Joanna

doi:10.3390/en16176254

Cited by 8 publications

(8 citation statements)

References 118 publications

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“…Nowadays, much scientific effort is focused on the energy performance of buildings (Dudkiewicz & Szałański 2019, Ratajczak et al 2023) and the problem of the sick building syndrome (Krawczyk et al 2023). Using renewable energy sources in buildings can significantly help cover energy needs, which can also impact the air quality through proper ventilation.…”

Section: Introductionmentioning

confidence: 99%

Performance of the Heat Pump and Photovoltaic Systems Installed in the Single-family House

Dębska,

Honus,

Dąbek

et al. 2024

Rocznik Ochrona Środowiska

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Renewable energy sources are increasingly common in Poland, and a growing number of single-family houses are now equipped with such systems. The article presents the study of the performance of the heat pump and the photovoltaic system installed in a house in the Swietokrzyskie Province near the city of Kielce. The data related to thermal and electrical energy generation throughout three years has been analysed with a focus on the advantages offered by such systems in the climate conditions of Central Poland. It turned out that 2022 was the best year for electricity production because it exceeded the value of 8000 kWh, and in the winter period from November to February, energy production balances at 200-300 kWh, which proves the high efficiency of panels for electricity production even in unfavourable climatic conditions. The heat pump generates the smallest energy production to heat the house in the summer, while in the winter, this production increases intensively due to the heating season in Poland. These are values from 1500 kWh to values above 3000 kWh. Similarly, in the case of domestic hot water, these values are higher in winter than in summer. Additionally, the work includes electricity consumption before and after the installation of renewable energy sources. Simplified economic analysis has also been presented in the paper. The simple payback period is estimated at approximately 9 years.

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Section: Introductionmentioning

confidence: 99%

Performance of the Heat Pump and Photovoltaic Systems Installed in the Single-family House

Dębska,

Honus,

Dąbek

et al. 2024

Rocznik Ochrona Środowiska

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“…It is true that the amount of recoverable heat energy depends on both the type of appliance from which the greywater is discharged and the habits of the users. However, considering that the provision of thermal comfort is one of the most important aspects of building operation [26], and that thermal comfort during the use of sanitary facilities such as showers is influenced by, among other things, the flow rate and temperature of the water used [27], it can be assumed that the potential of this energy source is considerable, especially since energy consumption for DHW preparation is one of the main components of the energy balance in buildings [28], and its share of this balance is successively increasing [29].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Suitability of Using Artificial Neural Networks in Assessing the Effectiveness of Greywater Heat Exchangers

Starzec,

Kordana-Obuch,

Piotrowska

2024

Sustainability

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The use of greywater heat exchangers (GHEs) is an effective way to reduce energy consumption for heating domestic water. However, the available characteristics of this type of device are often insufficient and consider only a few selected parameters of water and greywater, which results in the need to look for tools enabling the determination of the effectiveness of GHEs in various operating conditions with incomplete input data. The aim of this paper was to determine the usefulness of artificial neural networks (ANNs). For this purpose, comprehensive experimental tests were carried out on the effectiveness of the horizontal heat exchanger, taking into account a wide range of water and greywater flow rates and temperatures of these media, as well as the linear bottom slope of the unit, which allowed for the creation of a database of 32,175 results. Then, the feasibility of implementing the full research plan was assessed using ANNs. The analysis showed that the impact of the media temperatures on the heat exchanger effectiveness values obtained using ANNs is limited, which makes it possible to significantly reduce the number of necessary experiments. Adopting only three temperature values of at least one medium allowed the generation of ANN models with coefficient values R2 = 0.748–0.999 and RMSE = 0.077–1.872. In the case of the tested GHE, the slope and the flow rate of the mixed water are of key importance. However, even in the case of parameters of significant importance, it is possible to reduce the research plan without compromising the final results. Assuming five different values for each of the four input parameters (a total of 625 combinations) made it possible to generate an ANN model (R2 = 0.993 and RMSE = 0.311) with high generalization ability on the full research plan covering 32,175 cases. Therefore, the conducted analysis confirmed the usefulness of ANNs in assessing the effectiveness of GHEs in various operating conditions. The approach described in this paper is important for both environmental and economic reasons, as it allows for reducing the consumption of water and energy, which are necessary to carry out such scientific research.

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“…Therefore, it is essential to ensure high indoor environmental quality (IEQ). A key parameter of IEQ is thermal comfort, which is maintained by heating, ventilation, and air conditioning (HVAC) systems [7].…”

Section: Introductionmentioning

confidence: 99%

Innovative High-Induction Air Diffuser for Enhanced Air Mixing in Vehicles and Personalized Ventilation Applications

Bode,

Joldos,

Sirbu

et al. 2024

Energies

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Thermal comfort is very important for the well-being and safety of vehicle occupants, as discomfort can elevate stress, leading to distracted attention and slower reaction times. This creates a riskier driving environment. Addressing this, high-induction air diffusers emerge as a significant innovation, enhancing indoor environmental quality (IEQ) by efficiently mixing cool air from the heating ventilation and air conditioning (HVAC) system with the cabin’s ambient air. This process ensures uniform airflow, diminishes temperature discrepancies, prevents draft sensations, and boosts overall air quality by improving air circulation. In addition to enhancing thermal comfort in vehicles, the novel air diffuser also offers significant potential for personalized ventilation systems, allowing for individualized control over airflow and temperature, thereby catering to the specific comfort needs of each occupant. This study introduces a novel air diffuser that demonstrates a 48% improvement in air entrainment compared to traditional diffusers, verified through Ansys Fluent simulations and laser Doppler velocimetry (LDV) measurements. At a fresh airflow rate of 31.79 m3/h, the total air entrainment rate at 0.6 m for the standard air diffuser is 73.36 m3/h, while for the innovative air diffuser, it is 109.26 m3/h. This solution has the potential to increase the level of thermal comfort and air quality within vehicles, and also signals potential applications across various enclosed spaces, underscoring its importance in advancing automotive safety and environmental standards.

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Recent Achievements in Research on Thermal Comfort and Ventilation in the Aspect of Providing People with Appropriate Conditions in Different Types of Buildings—Semi-Systematic Review

Cited by 8 publications

References 118 publications

Performance of the Heat Pump and Photovoltaic Systems Installed in the Single-family House

Performance of the Heat Pump and Photovoltaic Systems Installed in the Single-family House

Evaluation of the Suitability of Using Artificial Neural Networks in Assessing the Effectiveness of Greywater Heat Exchangers

Innovative High-Induction Air Diffuser for Enhanced Air Mixing in Vehicles and Personalized Ventilation Applications

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