A Comparative Study of Energy Performance of Fumed Silica Vacuum Insulation Panels in an Apartment Building

Since recently almost all housing built in Korean have shared walls and floor, diverse problems are unavoidable including noise between floor arising from noise and vibration. Many efforts have been made by the Korean government, but the number of complaints related with the noise between floors has been gradually increasing. Therefore, through the field measurements by house type, the current state of noise was understood. To do this, the noise between floors was measured in an apartment household and a multiplex house to perform a comparative analysis. As the result, the differences in the noise between the two house types were clarified. The findings of this research are expected to contribute to reduction of the noise between floors in an apartment building in the future.

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Comparative study on the energy performance of two different absorption-compression refrigeration cycles driven by low-grade heat

Applied Thermal Engineering ◽

10.1016/j.applthermaleng.2016.05.169 ◽

2016 ◽

Vol 106 ◽

pp. 33-41 ◽

Cited By ~ 23

Author(s):

Yingjie Xu ◽

Ning Jiang ◽

Qin Wang ◽

Guangming Chen

Keyword(s):

Comparative Study ◽

Energy Performance ◽

Low Grade ◽

Low Grade Heat

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A comparative study on energy performance assessment for HVAC systems in high-tech fabs

Journal of Building Engineering ◽

10.1016/j.jobe.2021.102188 ◽

2021 ◽

Vol 39 ◽

pp. 102188

Author(s):

Yu Zhao ◽

Nan Li ◽

Chenyang Tao ◽

Qiong Chen ◽

Mengqi Jiang

Keyword(s):

Comparative Study ◽

Performance Assessment ◽

Energy Performance ◽

Hvac Systems ◽

High Tech

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Redefining cost-optimal nZEB levels for new residential buildings

E3S Web of Conferences ◽

10.1051/e3sconf/201911103035 ◽

2019 ◽

Vol 111 ◽

pp. 03035 ◽

Cited By ~ 2

Author(s):

Raimo Simson ◽

Endrik Arumägi ◽

Kalle Kuusk ◽

Jarek Kurnitski

Keyword(s):

Energy Use ◽

Net Present Value ◽

Residential Buildings ◽

Energy Performance ◽

Optimal Level ◽

Building Envelope ◽

Simulation Software ◽

The European Union ◽

Apartment Building ◽

Detached House

In the member states of the European Union (EU), nearly-Zero Energy Buildings (nZEB) are becoming mandatory building practice in 2021. It is stated, that nZEB should be cost-optimal and the energy performance levels should be re-defined after every five years. We conducted cost-optimality analyses for two detached houses, one terraced house and one apartment building in Estonia. The analysis consisted on actual construction cost data collection based on bids of variable solutions for building envelope, air tightness, windows, heat supply systems and local renewable energy production options. For energy performance analysis we used dynamic simulation software IDA-ICE. To assess cost-effectiveness, we used Net Present Value (NPV) calculations with the assessment period of 30 years. The results for cost-optimal energy performance level for detached house with heated space of ~100 m2 was 79 kWh/(m2 a), for the larger house (~200 m2) 87 kWh/(m2 a), for terraced house with heated space of ~600 m2 71 kWh/(m2 a) and for the apartment building 103 kWh/(m2 a) of primary energy including all energy use with domestic appliances. Thus, the decrease in cost-optimal level in a five-year period was ~60% for the detached house and ~40% for the apartment building, corresponding to a shift in two EPC classes.

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The influence of heat loss from pipes in an unheated basement on the heating energy consumption of an entire typical apartment building

E3S Web of Conferences ◽

10.1051/e3sconf/202017212005 ◽

2020 ◽

Vol 172 ◽

pp. 12005

Author(s):

Anti Hamburg ◽

Targo Kalamees

Keyword(s):

Energy Balance ◽

Heat Loss ◽

District Heating ◽

Building Energy ◽

Energy Performance ◽

Heat Losses ◽

Hot Water ◽

Limited Information ◽

Apartment Building ◽

Heating Energy Consumption

The majority of old apartment buildings were designed with an unheated basement. Building service systems such as district heating heat exchangers and pipes for domestic hot water and for space heating are usually located in this unheated basement. In addition, these locations are connected with shafts. All these pipe’s heat losses increase air temperature in the basement. If these losses are included into the building energy balance, then they decrease heat loss through the basement ceiling. The basement’s heat balance is also dependent on heat loss from the basement envelope and outdoor air exchange in the basement. In early stages of design, designers and energy auditors need rough models to make decisions in limited information conditions. Once the effects of heat losses from pipes become apparent, they need to be factored into the buildings energy balance, and their effects on heat loss through the basement ceiling needs to be calculated. In this paper we analyse the effect these heat losses have on the service system’s heat gains and heat loss through an uninsulated basement ceiling at different basement insulation levels and with different thicknesses of pipe insulation. From our study we found that pipe losses in the basement increase the building energy performance value by at least 4 kWh/(m²∙a) and their impact on a renovated apartment building is very important.

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