scholarly journals Evaluation of Heating and Cooling Loads for a Well-Insulated Single-Family House under Variable Climate Pattern

2021 ◽  
Vol 25 (1) ◽  
pp. 750-763
Author(s):  
Aleksejs Prozuments ◽  
Arturs Staveckis ◽  
Jurgis Zemitis ◽  
Diana Bajare
Keyword(s):  
Thermal Performance ◽  
Thermal Energy ◽  
Energy Demand ◽  
Heat Waves ◽  
Reference Scenario ◽  
Single Family ◽  
Weather Patterns ◽  
Heating And Cooling ◽  
Significant Step ◽  
Family House

Abstract Single family houses consume substantially more thermal energy per floor area compared to multi-apartment buildings to satisfy space heating or cooling demand. Over the past decades there has been an undisputed evidence of a temperature rise across the world that has led to a growing concern of more extreme weather patterns and regular seasonal heat waves globally. As such, building occupants are at a continuously growing risk to overheating exposure inside the premises. Within the framework of this study a single-family house was examined with respect to its thermal performance in warm and cold seasons. A simulation model was developed in IDA-ICE software to evaluate annual thermal energy demand for a reference scenario, 3 shading scenarios and for an optimized scenario. At an optimized scenario that incorporates mechanical ventilation with a heat recovery unit and enhanced thermal performance of the external building elements, the annual thermal energy demand in the proposed single-family house was reduced by 39.5 % compared to the reference scenario, which is a significant step towards meeting nearly zero energy building criteria.

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

Buildings ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 595
Author(s):  
Joanna Ferdyn-Grygierek ◽  
Izabela Sarna ◽  
Krzysztof Grygierek
Keyword(s):  
Thermal Comfort ◽  
Thermal Insulation ◽  
Energy Demand ◽  
Residential Buildings ◽  
Weather Data ◽  
Zone Model ◽  
Single Family ◽  
Human Thermal Comfort ◽  
Heating And Cooling ◽  
Family House

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%).

scholarly journals Stochastic energy-demand analyses with random input parameters for the single-family house

2021 ◽  
Author(s):  
Marcin Koniorczyk ◽  
Witold Grymin ◽  
Marcin Zygmunt ◽  
Dalia Bednarska ◽  
Alicja Wieczorek ◽  
...  
Keyword(s):  
Monte Carlo ◽  
Energy Consumption ◽  
Monte Carlo Method ◽  
Energy Demand ◽  
Stochastic Perturbation ◽  
Random Variable ◽  
Single Family ◽  
The Monte Carlo Method ◽  
Stochastic Perturbation Method ◽  
Family House

AbstractIn the analyses of the uncertainty propagation of buildings’ energy-demand, the Monte Carlo method is commonly used. In this study we present two alternative approaches: the stochastic perturbation method and the transformed random variable method. The energy-demand analysis is performed for the representative single-family house in Poland. The investigation is focused on two independent variables, considered as uncertain, the expanded polystyrene thermal conductivity and external temperature; however the generalization on any countable number of parameters is possible. Afterwards, the propagation of the uncertainty in the calculations of the energy consumption has been investigated using two aforementioned approaches. The stochastic perturbation method is used to determine the expected value and central moments of the energy consumption, while the transformed random variable method allows to obtain the explicit form of energy consumption probability density function and further characteristic parameters like quantiles of energy consumption. The calculated data evinces a high accordance with the results obtained by means of the Monte Carlo method. The most important conclusions are related to the computational cost reduction, simplicity of the application and the appropriateness of the proposed approaches for the buildings’ energy-demand calculations.

scholarly journals Metamaterial Concentrator for Thermal Energy Harvester

2020 ◽  
Vol 190 ◽  
pp. 00032
Author(s):  
Rapha Nichita Kaikatui ◽  
Adik Putra Andika ◽  
Vinsenius Letsoin ◽  
Paulus Mangera ◽  
Damis Hardiantono ◽  
...  
Keyword(s):  
Thermal Energy ◽  
Communication Systems ◽  
Energy Demand ◽  
Electrical Potential ◽  
Electrical Energy ◽  
Heat Energy ◽  
Small Scale ◽  
Alternative Source ◽  
Heating And Cooling ◽  
Technological Advances

Energy demand increases in line with rapid technological advances. Research on the harvesting of renewable energy continues to be done to make efforts to convert heat energy, which is very abundant in our daily environment. Thermoelectric technology is an alternative source in answering energy needs and can produce energy on a large and small scale. Thermoelectric technology works by converting heat energy into electricity directly, or from electricity to cold. This research presents an experimental study conducted to find out the thermoelectric characteristics of the TEC in the reversal function, with heating and cooling tests on each side of the TEC type thermoelectric element, carried out to obtain the voltage value as the electrical potential generated from this element. The result is thermoelectric potential to generate DC electricity but is very limited in the function of maintaining a heat source on the hot side element. This research then proposes thermal metamaterial that functions as a collector of thermal energy in the method of converting thermal energy into DC electrical energy for the application of low power consumption communication systems.

Analysis of Energy and Internal Environment Improvements in a Single Family House

2014 ◽  
Vol 899 ◽  
pp. 3-6 ◽  
Author(s):  
Martin Kamenský ◽  
Anna Vaskova ◽  
Marián Vertaľ
Keyword(s):  
Energy Efficiency ◽  
Energy Savings ◽  
Building Design ◽  
Low Energy ◽  
Internal Environment ◽  
Single Family ◽  
Cooling Period ◽  
Heating And Cooling ◽  
Family House

The next step in energy efficiency building design focus on near energy zero buildings. To design such buildings is important to understand how people use low energy building and to find reserves in energy. The paper presents an analysis of reserves in a family house. The analysis is done with simulations of different design and operation solutions based on knowledge from in situ measurements. Results show there are reserves in the heating and cooling period of year, which can lead to further energy savings of up to 15% and internal environment improvements.

scholarly journals Energy modeling of a single-family house with photovoltaics for the Russian Federation

2019 ◽  
Vol 110 ◽  
pp. 01016
Author(s):  
Dmitry Shiryaev ◽  
Andrey Benuzh
Keyword(s):  
Russian Federation ◽  
Energy Demand ◽  
Energy Performance ◽  
Climatic Conditions ◽  
Energy Modeling ◽  
The Arctic ◽  
Single Family ◽  
Climate Conditions ◽  
The Russian Federation ◽  
Family House

Residential sector in Russia makes up a significant part in the total energy demand of the country. The article demonstrates sensible energy saving potential in case of a single-family house in different climate conditions of the Russian Federation. Modern tools of building energy performance simulation and renewable energy modeling demonstrated a significant effect of the complex energy efficiency technologies, such as using of modern highly insulated constructional materials, installation of efficient heating, ventilation and air conditioning systems, and implementation of sustainable energy. Annual energy use dramatically declines in comparing with buildings built according to outdated technologies. In particular, the use of photovoltaic modules can meet more than half of the building's energy demand and ensure the autonomy of a building during the warm season. These values differ depending on the location due to the large territory and diverse climatic conditions from the Mediterranean in the south to the Arctic ones in the north.

scholarly journals Thermal Performance and Comfort Conditions Analysis of a Vernacular Palafitic Timber Building in Portuguese Coastline Context

2020 ◽  
Vol 12 (24) ◽  
pp. 10484
Author(s):  
Jorge Fernandes ◽  
Ricardo Mateus ◽  
Helena Gervásio ◽  
Sandra Monteiro Silva ◽  
Jorge Branco ◽  
...  
Keyword(s):  
Thermal Performance ◽  
Energy Demand ◽  
Energy Performance ◽  
Subjective Analysis ◽  
Heating And Cooling ◽  
Condition Evaluation ◽  
Timber Constructions ◽  
U Value ◽  
The Difference

The palafitic timber constructions of the central Portuguese coastline are an example of the adaptation to site-specific conditions (climate and sand landscape morphodynamics) using the available endogenous resources. Thus, in a context of environmental awareness and climate change, it is relevant to understand their features/strategies and how they perform. This work analyses the energy performance and thermal condition evaluation of a vernacular timber building–palheiro–from Praia de Mira, through in situ measurements, subjective analysis and energy simulation provided by DesignBuilder/EnergyPlus. The results show a good or satisfactory thermal performance during most of the seasons by passive means only. Despite, it was not possible to guarantee thermal comfort conditions for the occupants during winter. In the energy performance analysis, five scenarios, with different external walls, were compared. In the two scenarios that satisfy the maximum U-value for the climate zone, the current conventional building had a slightly better performance on heating and cooling (less 1.1 and 1.4 kWh/m2, respectively) than the timber building. However, the difference between the two construction solutions is not substantial in the annual energy demand (2.5 kWh/m2, 7.3%), indicating that timber structures are suitable in this mild climate area.

scholarly journals Influence of the quantity profile of the domestic hot water demand and the energy demand for the heating in a single-family house on the SCOP of the air-to-water heat pump

2018 ◽  
Vol 44 ◽  
pp. 00162 ◽  
Author(s):  
Kamil Skoneczny
Keyword(s):  
Energy Efficiency ◽  
Heat Pump ◽  
Water Demand ◽  
Energy Demand ◽  
Hot Water ◽  
Single Family ◽  
Domestic Hot Water ◽  
Family House

In the article it was discussed how the energy efficiency of the air-to-water heat pump can change depending on the different ways of the building usage. The author shows that the following factors influence this efficiency: the DHW demand and the demand of the energy for the heating of the building. The article shows that it is very important to take into account the cooperation of both systems, the DHW and the heating. Two models of the SCOP calculations were discussed: in monthly and hourly steps of the calculation. For each model the following assumptions were considered: the different profiles of the domestic hot water demand and the different profiles of the demand for the heating of building.

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