Contractor

Name : Kunst Engineering

Contact : 82-2-6738-2010

 http://www.kunsteng.com

Construction Manager

Name : EAN Architect

Contact : 82-2-558-3654

 http://www.eanarch.co.kr

Stakeholders

Function : Designer

EAN Architect

82-2-558-3654

 http://www.eanarch.co.kr


Building Design and Planning

Function : Manufacturer

LG Hausys

82-80-005-4000

 http://www.lghausys.com


Supply Turn & Tilt Window

Energy consumption

• Primary energy need : 172,50 kWhpe/m².year
• Primary energy need for standard building : 307,90 kWhpe/m².year

Calculation method : Other

CEEB : 0.0001

Breakdown for energy consumption : Heating: 38.4 kWhpe/m2 year
Cooling: 48.7 kWhpe/m2 year
Hot water: 19.3 kWhpe/m2 year
Lighting: 45.5 kWhpe/m2 year
Ventilation: 20.6 kWhpe/m2 year

• Initial consumption : 184,70 kWhpe/m².year

Envelope performance

• Envelope U-Value : 0,22 W.m^-2.K^-1
More information :

Roof U-Value: 0.134 W/m2K
Floor U-Value: 0.272 W/m2K
Glazing U-Value: 1.495 W/m2K

 Reducing Energy Demand by Enhancing Insulation Performance:
The envelope performance for reducing energy demand were improved by making the roof insulation performance 2.73 times better than the conventional one, floor insulation performance 1.93 times, external wall insulation 2.23 times, and window insulation performance 2.25 times. In addition, the optimal insulation practices were applied to the basement floor of an aging building to prevent potential thermal loss and condensation. As a result, the energy demand was reduced by 37.6% from 119.5kWh/m2·yr to 74.6kWh/m2·yr compared to the existing building before the renovation. In this way, EAN Technology Headquarters archived 1+ grade in Building Energy Efficiency Rating in Korea.

More information

 Application of the High-efficiency HVAC Equipment:
To reduce energy load, the inefficient existing mechanical system of cooling had to be replaced. Therefore, high-efficiency EHP and electric instant water heaters were installed to provide energy efficient heating, cooling and hot water supply.

 Application of the High-efficiency LED Lighting and Optimal Lighting Control:
Through the renovation, the lighting power density was reduced by about 31.6% as the lighting power density before the renovation was 9.38W/㎡ and the lighting power density after the renovation was 6.42W/㎡. From the simple ON/OFF control, the optimal lighting control was implemented through automatic control with the occupant sensor and dimming control.

Real final energy consumption

Final Energy : 172,50 kWhfe/m².year

Systems

Heating system :
• Heat pump
Hot water system :
• Gas boiler
• Individual electric boiler
Cooling system :
• VRV Syst. (Variable refrigerant Volume)
Ventilation system :
• Natural ventilation
• Double flow heat exchanger
Renewable systems :
• No renewable energy systems

Smart Building

BMS :

 Efficient Energy Optimal Control using BEMS:
Through applying in-house developed BEMS, the efficiency of the building’s energy usage is maximized as it comprehensively analyzes energy usage and environmental variables of the building, and operation patterns of facilities systems. With BEMS, the optimal control of the air conditioning system can be carried out, and the data collection and monitoring of the EAN Technology Headquarters building were enabled.

Users’ opinion on the Smart Building functions :

Urban environment

The existing building before the renovation was previously used as an office and hostel facilities. Despite having good access to Seolleung metro station and Seonjeongneung, a UNESCO World Heritage site, the surrounding environment of the building was limited to narrow streets where entertainment and restaurants were located and creating an untidy and depressing atmosphere.  To overcome disadvantages of the existing site characteristics, from a design perspective, this renovation project focused on maximizing the view of Seonjeongnueng’s greenery space and urban scenery of Seoul which are the excellent factors of the existing site characteristics.  Also, this project has focused on complementing the depressing image that is interfered by the entertainment industry through implementing the wind-capture design as adding an external element on the building facade of lower level floors to blocking the view of entertainment and restaurant facilities.

• Land plot area : 377,70 m²
• Built-up area : 58,50 %
• Green space : 38,06

Product

Turn & Tilt Glazing



LG Hausys

82-80-005-4000

 http://www.lghausys.com


Product category : Finishing work / Exterior joinery - Doors and Windows

LG Hausys's Turn & Tilt Glazing window is effectively three window types in one: a fixed window, an in-swing casement window and a hopper window. The benefits of this window are that the user can choose the adequate mode by purpose and operate easily. For draft-free natural ventilation, tilt mode is suggested and turn mode is suitable when exchanging polluted indoor air to fresh outdoor air.

LG Hausys is one of the leading domestic company for supplying high-quality window and door with advanced technology. EAN Technology has selected LG Hausys's Turn & Tilt Glazing window by respecting its ease of deliverable, cost-effective, and benefits in maintenance compare to overseas products.

External Venetian blinds



Somfy

82-31-600-5250

 https://www.somfy.co.kr/


Product category : Finishing work / Millwork - Hardware

Somfy's External Venetian blinds are for the exterior surface of a building window and can be adjusted by the user to control daylight and views. Also, the user able to control the External Venetian blinds automatically through the mobile application.

Somfy is a professional company producing high-quality products with advanced technology such as the external Venetian blinds with smart motorized systems. Considering the price and the company's vision towards innovative technology, Somfy's Venetian blind was selected to be installed.

Construction and exploitation costs

• Total cost of the building : 12 788 590 €

Energy bill

• Forecasted energy bill/year : 30 650,00 €

Real energy cost/m2 : 15.35

Real energy cost/Work station : 261.97

Life Cycle Analysis

Eco-design material :

• Wind-capture design to maximize natural ventilation
• Improved external wall insulation with PF board
• Improved roof insulation with vacuum insulation
• High-performance window

Water management

• Consumption from water network : 423,90 m³

Water Consumption/m2 : 0.21

Water Consumption/Work station : 3.62

 Application of the Water-saving Sanitary Facilities:
The water consumption of the EAN Technology Headquarters building through sustainable renovation was reduced by 45.9% compared to the EPA standard by using a water-saving toilet bowl, urinal, faucet and shower head. For all selected sanitary appliances, the test certificate and the environmental label certificate were verified to confirm the reduction of water consumption.

Indoor Air quality

•  Improvement of Natural Ventilation Efficiency:

Due to the influence of surrounding buildings, low airflow condition that reducing indoor airflow speeds and reducing air circulation occurred.  To solve this issue, the ventilation opening area of the window was increased during the renovation process, and the turn-and-tilt window was installed to maximize natural ventilation according to the wind direction. In addition, a high-efficiency total heat exchanger was installed on each floor to provide more fresh outdoor air to building occupants.

•  Environment-friendly Interior Finishing Materials:

Indoor finishing materials such as paints, adhesives, and sealants with minimum VOC content were applied to reduce adverse effects on occupants and verify air quality tests.

•  Indoor CO2 Concentration Monitoring:

CO2 monitoring sensors were installed on each floor which alarm will activate when indoor CO2 concentration exceeds 1000ppm and the outdoor air of the total heat exchanger can be provided in conjunction with BEMS. 

Comfort

Health & comfort :

• Simulation Analysis:

Simulation of indoor wind speed, temperature and airflow environment were performed for analysis of thermal comfort.  The simulation included various heat loads (human body, office equipment, etc.) of office facilities and external daylight loads based on 2 pm of the summer season, which is most affected by solar radiation.

 

• Improved Airflow Environment:

Before the renovation, there was a factor that obstructed the work due to the influx of the odor generated from the restaurants around the project building.  However, the installation of the high airtight window and the total heat exchanger minimized the influence of odor influx.

 

• Improved Lighting Efficiency:

All lighting fixtures were replaced with LED lamps and office reflect the space-specific lighting control.  The conference rooms were designed to enable dimming control of the room, so that the lighting, color temperature and layout can be freely changed according to the user’s needs.

 

• Barrier Free Design:

Barrier Free design reflected to allow people with disabilities to respond to various situations.  The handle of the toilet is made of appropriate material and thickness, and the door is also minimized in the inconvenience of opening and closing with the sliding door.  Tactile paving was installed at the stairwell to allow visually impaired users could recognize the start and end of the staircase. 

Calculated thermal comfort : 26°C in Summer, 20°C in Winter

Measured thermal comfort : 26°C in Summer, 20°C in Winter

GHG emissions

• GHG in use : 4,30 KgCO₂/m²/year
• GHG before use : 54,94 KgCO₂ /m²
• Building lifetime : 50,00 year(s)

, ie xx in use years : 12.78