Energy Performance Analysis on the Design Conditions of High-Rise Apartment Houses in South Korea

2014 ◽  
Vol 1025-1026 ◽  
pp. 1099-1102 ◽  
Author(s):  
Hae Kwon Jung ◽  
Ki Hyung Yu ◽  
Young Sun Jeong
Keyword(s):  
South Korea ◽  
Thermal Insulation ◽  
Energy Demand ◽  
Residential Buildings ◽  
Building Envelope ◽  
Apartment House ◽  
High Rise ◽  
Heating And Cooling ◽  
Functional Efficiency ◽  
Cooling Energy Demand

Aapartment houses account for more than 60% of the total of residential buildings to be built in South Korea. In particular, a high-rise apartment house with 21 floors or more has steadily increased in densely populated areas. The heating and cooling energy demand of the apartment house is greatly affected by the shape and the thermal insulation of its building envelope. In addition to its functional efficiency, the shape of building envelope in a high-rise apartment house is considered to be an important factor for the urban landscape with diverse construction methods and materials. In this study, we analyzed the heating and cooling energy demand depending on the effective heat capacity of building structure and the installation position of thermal insulation materials as the design conditions of high-rise apartment houses. This study used the ECO2 energy analysis program for the building energy efficiency grading certification system in South Korea.

scholarly journals Improved Human Thermal Comfort with Indoor PCM-Enhanced Tiles in Living Spaces in the Arabian Gulf

2018 ◽  
Vol 57 ◽  
pp. 04001 ◽  
Author(s):  
Albert Al Touma ◽  
Djamel Ouahrani
Keyword(s):  
Thermal Comfort ◽  
Energy Demand ◽  
Residential Buildings ◽  
Arabian Gulf ◽  
Weather Conditions ◽  
Building Envelope ◽  
Human Thermal Comfort ◽  
Outdoor Environments ◽  
Radiant Temperature ◽  
Cooling Energy Demand

Al-Majlis is the living space in residential buildings of the Arabian Gulf, and is where occupants spend most of their time. For this reason, the human thermal comfort in this space is of extreme importance and is often compromised due to hot outdoor weather conditions. In contrast with many thermal discomfort mitigation methods in outdoor environments, which become unadvisable in indoor spaces, this study investigates the effect of adding PCM-enhanced tiles to portions of the indoor envelope on the occupant’s thermal comfort and the space cooling energy demand. A simulation model of a space with tight building envelope in Qatar was developed on EnergyPlus with and without the addition of PCM-enhanced tiles. The selected country is a representative location of the Arabian Gulf. Considering different occupant’s positions, the addition of the tiles with PCM on their back was found to moderate the mean radiant temperature, operative temperature, Predicted Mean Vote (PMV) and Predicted Percentage of Dissatisfied (PPD), all of which signify an improvement in the human thermal comfort. Lastly, this change in the indoor envelope was found to save 3.3% of the space daily thermal cooling energy demand during one harsh summer representative day.

scholarly journals Analysis of the Effects of Strengthening Building Energy Policy on Multifamily Residential Buildings in South Korea

2020 ◽  
Vol 12 (9) ◽  
pp. 3566
Author(s):  
Byung Chang Kwag ◽  
Sanghee Han ◽  
Gil Tae Kim ◽  
Beobjeon Kim ◽  
Jong Yeob Kim
Keyword(s):  
Energy Consumption ◽  
South Korea ◽  
Energy Policy ◽  
Energy Demand ◽  
Residential Buildings ◽  
Building Energy ◽  
Energy Performance ◽  
Primary Energy ◽  
Building Envelope ◽  
Primary Energy Consumption

The purposes of this study were to overview the building-energy policy and regulations in South Korea to achieve energy-efficient multifamily residential buildings and analyze the effects of strengthening the building design requirements on their energy performances. The building energy demand intensity showed a linear relationship with the area-weighted average U-values of the building envelope. However, improving the thermal properties of the building envelope was limited to reducing the building-energy demand intensity. In this study, the effects of various energy conservation measures (ECMs) on the building-energy performance were compared. Among the various ECMs, improving the boiler efficiency was found to be the most efficient measure for reducing the building-energy consumption in comparison to other ECMs, whereas the building envelope showed the least impact, because the current U-values are low. However, in terms of the primary energy consumption, the most efficient ECM was the lighting power density because of the different energy sources used by various ECMs and the different conversion factors used to calculate the primary energy consumption based on the source type. This study showed a direction for updating the building-energy policy and regulations, as well as the potential of implementing ECMs, to improve the energy performances of Korean multifamily residential buildings.

scholarly journals Effect of thermal mass of insulated and non-insulated walls on building thermal performance and potential energy saving

2021 ◽  
Vol 2042 (1) ◽  
pp. 012159
Author(s):  
M Haj Hussein ◽  
S Monna ◽  
A Juaidi ◽  
A Barlet ◽  
M Baba ◽  
...  
Keyword(s):  
Potential Energy ◽  
Thermal Insulation ◽  
Thermal Performance ◽  
Energy Demand ◽  
Thermal Environment ◽  
Residential Buildings ◽  
Thermal Mass ◽  
Climatic Zones ◽  
Performance Simulation ◽  
Heating And Cooling

Abstract The presented study aims to evaluate the effect of thermal mass in heavyweight construction in residential buildings in Palestine on indoor thermal environment using a building performance simulation tool. The most used residential building types, shapes and sizes were used as typical models for indoor environment performance simulation. The paper used a sensitivity analysis for four different scenarios according to the location of thermal insulation in the wall for two climatic zones, when no heating and cooling was used. The building material’s thermal properties, infiltration, activities, time schedule, electric lighting and glazing selection were based on onsite studies. The results show that the internal thermal mass of the studied buildings influences their thermal performance and future potential energy demand for heating and cooling. Buildings with insulation positioned on the outside, with high thermal mass and high thermal time constant showed the best thermal performance for different climatic zones, whereas buildings without thermal insulation or with insulation from the inside showed the worst thermal performance. The position of thermal insulation will affect potential energy demand for heating and cooling in the residential buildings.

scholarly journals Analysis and Comparison of Energy Efficiency Code Requirements for Buildings: A Morocco–Spain Case Study

Energies ◽  
2020 ◽  
Vol 13 (22) ◽  
pp. 5979
Author(s):  
Ikram Merini ◽  
Angel Molina-García ◽  
M. Socorro García-Cascales ◽  
Mustapha Mahdaoui ◽  
Mohamed Ahachad
Keyword(s):  
Energy Efficiency ◽  
Energy Demand ◽  
Residential Buildings ◽  
Residential Building ◽  
Transport Sector ◽  
Tertiary Sector ◽  
Improve Energy Efficiency ◽  
Heating And Cooling ◽  
New Energy ◽  
Cooling Energy Demand

The trend in energy consumption, with a particular focus on heating and cooling demand, is an issue that is relevant to the promotion of new energy policies and more efficient energy systems. Moreover, heating and cooling energy demand is expected to rise in the next several decades, mainly due to climate change as well as increasing incomes in developing countries. In this context, the building sector is currently a relevant energy-intensive economic sector in Morocco; it accounts for 33% of the country’s total energy demand (as the sector with the second highest energy demand, after the transport sector), with the residential sector accounting for 25% and the tertiary sector accounting for 8%. Aiming to reduce energy dependence and promote sustainable development, the Moroccan government recently issued a comprehensive plan to increase the share of renewables and improve energy efficiency. This strategy includes novel thermal building regulations promoted by the Moroccan Agency for Energy Efficiency. This paper analyzes the thermal behavior and heating-cooling energy demand of a residential building located in Tangier (Morocco) as a case example, based on the country’s new thermal regulations and considering specific climatological conditions. A comparison with common Moroccan residential buildings as well as with those in nearby countries with similar meteorological conditions but significant differences in terms of energy demand regulation and requirements, such as Spain, is also included. Simulations were carried out using the DesingBuilder and EnergyPlus Software packages. According to the results, the last building thermal regulation requirements in Morocco need to be revised and extended in order to achieve the energy efficiency objectives established by the Moroccan government for 2030.

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 Heating and Cooling Degree-Days Climate Change Projections for Portugal

Atmosphere ◽  
2021 ◽  
Vol 12 (6) ◽  
pp. 715
Author(s):  
Cristina Andrade ◽  
Sandra Mourato ◽  
João Ramos
Keyword(s):  
Climate Change ◽  
High Resolution ◽  
Thermal Comfort ◽  
Energy Demand ◽  
Residential Buildings ◽  
Degree Days ◽  
Climate Change Projections ◽  
Heating And Cooling ◽  
Cooling Degree Days ◽  
Heating Energy Demand

Climate change is expected to influence cooling and heating energy demand of residential buildings and affect overall thermal comfort. Towards this end, the heating (HDD) and cooling (CDD) degree-days along with HDD + CDD were computed from an ensemble of seven high-resolution bias-corrected simulations attained from EURO-CORDEX under two Representative Concentration Pathways (RCP4.5 and RCP8.5). These three indicators were analyzed for 1971–2000 (from E-OBS) and 2011–2040, and 2041–2070, under both RCPs. Results predict a decrease in HDDs most significant under RCP8.5. Conversely, it is projected an increase of CDD values for both scenarios. The decrease in HDDs is projected to be higher than the increase in CDDs hinting to an increase in the energy demand to cool internal environments in Portugal. Statistically significant linear CDD trends were only found for 2041–2070 under RCP4.5. Towards 2070, higher(lower) CDD (HDD and HDD + CDD) anomaly amplitudes are depicted, mainly under RCP8.5. Within the five NUTS II

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