scholarly journals Space heating and cooling energy demand in energy efficient single-family house with mechanical ventilation system

2017 ◽  
Vol 24 (Supplement 1) ◽  
Keyword(s):  
Mechanical Ventilation ◽  
Energy Efficient ◽  
Energy Demand ◽  
Ventilation System ◽  
Space Heating ◽  
Single Family ◽  
Heating And Cooling ◽  
Family House ◽  
Cooling Energy Demand

scholarly journals An Evaluation of the Performance of a Ground-to-Air Heat Exchanger in Different Ventilation Scenarios in a Single-Family Home in a Climate Characterized by Cold Winters and Hot Summers

Energies ◽  
2021 ◽  
Vol 15 (1) ◽  
pp. 105
Author(s):  
Aldona Skotnicka-Siepsiak
Keyword(s):  
Mechanical Ventilation ◽  
Energy Efficiency ◽  
Heat Exchanger ◽  
Real World ◽  
Heat Recovery ◽  
Ventilation System ◽  
Single Family ◽  
Heating And Cooling ◽  
Family Home ◽  
Cooling Loads

In the present study, the real-world performance of a ground-to-air heat exchanger (GAHE) was analyzed in the Polish climate which is characterized by warm summers and cold winters. The heat exchanger’s performance was monitored over a period of three years (2017 to 2019), and real-world conditions were compared with a Typical Meteorological Year (TMY). The aim of the study was to assess the exchanger’s energy-efficiency potential in various ventilation scenarios in a single-family home under variable real-world conditions, rather than to simply determine its heating and cooling capacity. The analyzed single-family home was a modern, single-story building with a usable floor area of 115 m2. The building’s thermal insulation and airtightness met stringent energy-efficiency standards. Energy consumption in a building equipped with a natural ventilation system was compared with three other scenarios: ventilation coupled with a GAHE, mechanical ventilation with heat recovery and a high-efficiency heat exchanger (HE), and mechanical ventilation with heat recovery coupled with a GAHE. Sensible heating and cooling loads were calculated based on standard ISO 13790:2008, and latent heating and cooling loads were also included in the energy balance. During the year, the GAHE generated around 257.6 W of heating energy per hour and 124.7 W of cooling energy per hour. Presented results can be used to select the optimal HVAC system scenarios for engineering projects as well as private investors.

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 Indoor Air Quality Assessment in a Single-Family House Equipped with Demand Controlled Mechanical Ventilation

2020 ◽  
Vol 27 (3) ◽  
pp. 387-402
Author(s):  
Jarosław Müller ◽  
Maciej Dębowski
Keyword(s):  
Carbon Dioxide ◽  
Mechanical Ventilation ◽  
Meteorological Data ◽  
Ventilation System ◽  
Operating Cost ◽  
Carbon Dioxide Concentration ◽  
Contamination Level ◽  
Internal Source ◽  
Single Family ◽  
Family House

AbstractThe paper presents the results of modelling airflow for ventilation of a single-family house with an area of 180 m2. The building was equipped with mechanical ventilation with the possibility of varying the airflow. The airflow was calculated as a function of carbon dioxide concentration. The presence of people in selected rooms was an internal source of carbon dioxide. In order to properly design of a ventilation system and then model the contamination level, ContamW software was used. The year-long cost analysis was carried out for the installation working with variable airflow (day, night). The analysis took into account the price of the electricity used by the fans of Air Handling Unit and meteorological data to estimate the power input to the heater of the Unit. Different scenarios of system operation were included as an input data in order to find a difference in energy consumption. The calculations were to answer the question of whether it is necessary to apply expensive and advanced system that enables individual control of the airflow in every room or use the simple control of the central unit to vary the airflow in the ventilation system of single-family houses. The difference in operating cost between the system that maintains 800 and 600 ppm reaches 100 % and demonstrates the need of simple demand controlled ventilation system.

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 Assessment of the Validity of Investing in Energy-Efficient Single-Family Construction in Poland - Case Study

2016 ◽  
Vol 62 (4) ◽  
pp. 119-138 ◽  
Author(s):  
K. Tomczak ◽  
O. Kinash
Keyword(s):  
Energy Efficient ◽  
Investment Decisions ◽  
Minimal Energy ◽  
Single Family ◽  
Ahp Method ◽  
Energy Efficient Buildings ◽  
Custom Made ◽  
Polish Law ◽  
Family House

AbstractThe article raised issues related to the design and execution of low-energy objects in Polish conditions. Based on the designed single-family house, adapted to the requirements of the National Fund for Environmental Protection and Water Management (“NF40” standard), the tools to assist investment decisions by investors were shown. An economic analysis and a multi-criteria analysis were performed using AHP method which had provided an answer to the question whether it is worthwhile to bear higher investment costs in order to adjust to the standards of energy-efficient buildings that fulfil a minimal energy consumption's requirements contained in Polish law. In addition, the variant of object that had optimal characteristics due to the different preferences of investors was indicated. This paper includes analysis and observations on the attempts to unify that part of the building sector, which so far is considered to be personalized, and objects in accordance with the corresponding idea are designed as “custom-made”.

The Effects of Occupancy and Solar Energy on Homes in the Pacific Northwest Constructed According to Improved Thermal Standards

2020 ◽  
Author(s):  
D. R. Heerwagen ◽  
K. Nicoliasen ◽  
A. F. Emery
Keyword(s):  
Pacific Northwest ◽  
Thermal Response ◽  
Solar Heating ◽  
Space Heating ◽  
Occupant Behavior ◽  
Single Family ◽  
Heating Season ◽  
Heating And Cooling ◽  
Energy Needs ◽  
The Pacific

Abstract The space heating energy needed during the winter heating season in Seattle Washington, USA, was monitored over a 15 year period, 1987–2002. Single family residence houses were constructed to building code standards in force at the time of construction and two more to standards calling for envelopes with improved thermal resistance. Although space conditioning energy needs are strongly affected by occupant behavior, simulations generally ignore the temporal occupant behavior in estimating the energy needed for heating and cooling. Vigorous conservation tactics, which produce a thermal response that is highly transient, can lead to substantially different energy needs. No correlation could be established from the measured space heating when aggressive conservation made use of thermostat setback at every opportunity. In this paper we investigate the effects of occupant behavior and the effect of temporal solar heating of walls in the Seattle area for improved thermal construction.

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