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EXPO 2000 Phase III

EXPO 2000 Phase III


BULGARIA Sofia

Office: Financial 7,700 m2

LEED-CS v2009

ENERGY MODEL Commissioning

GOLD Certified

  • The EXPO 2000, Phase III Building is a new construction. It is designed as an office building with an underground garage. The building consists of 8 floor part and 3 basement floor part. On the first basement level a parking area and some of the technical rooms are located. The ground floor consists of main entrance, service facilities and open type offices. The remaining floors have been designed as open office spaces. Lifts, restrooms and other service facilities needed for the functionality of the offices are located in the core of the building. The necessary for the HVAC equipment spaces are located in the basement and on the roof of the building. The gross floor aea of the building is 7 700 m2.

    The COMMISSIONING PROCESSES and the ENERGY MODEL are encompassing the following base building systems:

    HVAC systems.
    Heating.  The building supply with hot water for heating is established via groundwater using heat pump system with water to water heat pump unit. As a backup source, hot water from the boiler plant of the nearby building is used. The heat and the cold distribution in the building are accomplished by separate pipe networks. The heating of the building is provided by floor and duct mounted fan coil units for the main lobby and by floor induction units for the office spaces.
    Air Conditioning. The cold water for the air conditioning of the building is provided mainly by the water to water heat pump unit using the groundwater from the drill well. As a backup source of cold water, an air cooled chiller is provided. It operates only in case of insufficient groundwater flow. Use of the groundwater for direct cooling is also envisaged. The cold water from the cooling plant is distributed to the building induction units and to two air handling units with rotary regenerators. AHU1-with an air flow of 34 000 m3/hr, and AHU2-with an air flow of 11 000 m3/hr, supply conditioned air to the floor induction units and lobby fan coil units. The conditioned outdoor air is provided with one and the same temperature all year round, because of the distribution network which allows switching between heating and cooling mode on each floor of the building.
    Ventilation. Separate ventilation systems for the sanitary and technical premises are provided. They are 100% dedicated outdoor air systems without energy recovery. For the garage an exhaust ventilation and smoke extract ventilation via directing jet fans and main ventilator is established. The fans work in parallel and the amount of the exhaust airflow is controlled by frequency inverters according to the degree of air pollution. In case of emergency the main and jet ventilators operate at maximum speed in order to provide 25-fold air exchange.
    Domestic hot water system. Hot water for domestic needs is provided separately via small electrical boilers on each floor, for each tenant.
    Automatic control system.  Building automation system is envisaged as centralized hierarchy structure. The system consists of field equipment, DDC station and operator station and has the ability to be expanded in future. The building management system is used for monitoring, regulation and control of the following systems: Heating /cooling center; Heating and cooling; Ventilation; Emergency ventilation; Lighting; Energy metering; Lifts, diesel generator, sprinkler.

    Lighting Installation.
    The interior lighting consists of main lighting with self-dimmed lights, standby lighting and emergency lighting. The lighting controls consist of light/movement sensors for the offices and switches for the other zones.

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    TECHNICAL SERVICES
    Categories Prerequisites and Credits Acquired Points
    ENERGY AND ATMOSPHERE





    EAp1 Fundamental Commissioning of the Building Energy Systems


    EAc3 Enhanced Commissioning


    2

    EAp2 Minimum Energy Efficiency Performance


    EAc1 Optimize Energy Efficiency Performance ENERGY MODEL 12
    INDOOR ENVIRONMENTAL QUALITY





    IEQp1 Minimum Indoor Air Quality Performance


    IEQc2 Increased Ventilation


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