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    HVAC Lecture

    Uploaded by

    Michael Angelo Manuel

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd

    HVAC Lecture

    Uploaded by

    Michael Angelo Manuel
    13 views52 pages

    Original Title

    3. HVAC Lecture (1)

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    © © All Rights Reserved

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    Copyright:

    © All Rights Reserved
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    13 views52 pages

    HVAC Lecture

    Uploaded by

    Michael Angelo Manuel

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    of 52

    HVAC-R

    Heating Ventilating and Air Conditioning - Refrigeration


    WINDOW TYPE AIR CONDITIONER
    SPLIT TYPE AIR CONDITIONER
    DUCTED TYPE AIR CONDITIONER
    CHILLER SYSTEMS – FOR CHILLED WATER TYPE AIR CONDITIONERS
    AIR COOLED WATER CHILLERS

    WATER COOLED WATER CHILLERS


    COOLING TOWERS FOR WATER COOLED AIRCON AND CHILLERS
    ROOF TOP AIR CONDITIONERS
    PACKAGE WATER COOLED AIR CONDITIONERS
    WORKSHOP
    HVAC-R
    Heating Ventilating and Air Conditioning - Refrigeration
    One Ton of Refrigeration (1TR) can freeze one ton
    of water (0degC / 32degF) for 24 hrs
    http://www.convertworld.com/en/power/Ton+of+refrigeration.html
    TIP # 1
    • Air conditioner sizes can be calculated using
    this formula

    BTU/hr = A + B
    A = width (ft) x length (ft) x 50
    B = # people x 500
    Sample Computation
    • For a 15ft x 20ft regular room with 2 people

    BTU/hr = A + B
    15000 = 15 (ft) x 20 (ft) x 50
    1000 = 2 people x 500

    Btu/hr = 15000 + 1000


    Btu/hr = 16000 (16,880 KJ, 1.33TR, 4.7kW)
    11,500 KJ

    16,880 KJ

    17,750 KJ
    TIP # 1
    • Air conditioner sizes can be calculated using this
    formula

    BTU/hr = A + B
    A = width (ft) x length (ft) x 50
    B = # people x 500

    Warning this is for estimation, and for regular room


    construction only. Consult your aircon supplier,
    contractor, designer, or use a cooling load /heat
    load apps.
    TIP # 2
    • Refer on the product catalogue for details, and
    use the information in coordinating with the
    other design and construction trades
    (electrical, mechanical, civil)
    Nominal
    Ratings are
    usually sized
    base on the
    compressor
    power in
    horsepower
    There is an
    indoor unit
    and there is
    an outdoor
    unit.
    Provide
    appropriate
    space.
    Cooling
    Capacity:
    choose it
    base on
    your cooling
    load
    calculation
    Power Input:
    Use this to
    calculate your
    electrical
    consumption
    multiplied by
    the #hrs of
    operation x
    Electricity Rate
    (Php/kwh)
    System Current:
    Use this to
    calculate your
    circuit breaker
    size.
    Usually multiply
    by 2.5 for the
    start-up.
    EER: The
    higher the
    value the more
    efficient
    Air Flow:
    If the aircon is
    ducted-type,
    the ducting
    size will be
    base on this.
    Around 3 to 5
    m/s air
    velocity
    Sound Level:
    Comfortable is
    40dB to 60dB
    Power Supply:
    Coordinate
    this with your
    electrical
    engineer or
    contractor.

    Voltage: 220v,
    380v, 400v, 440v

    Phase: Single or
    Three Phase

    Frequency:
    60Hz or 50Hz
    Physical Data:
    Use this for
    the layout and
    design of the
    equipment
    foundation.
    TIP # 3
    • Outdoor units (air-cooled condensers) should
    be located outside the building with enough
    space to dissipate heat to the environment.
    Do not put it on basements and inside the
    ceilings.
    TIP # 4
    • Provide enough space and access for repairs
    and maintenance of the equipment,
    refrigerant pipes, drain pipes and ducts.
    TIP # 5
    • For large aircon capacity starting from 50TR
    (tons of refrigeration cooling), use chiller
    water system and provide a chiller
    room/pump room and cooling towers at the
    roofdeck.
    Summary
    1. Use the quick calculation for regular room
    construction only and for estimate purposes.
    2. Always refer on the product catalogue for
    details of the equipment.
    3. Outdoor units should be located outside the
    building.
    4. Provide enough space and access for repairs
    and maintenance.
    5. Use chilled water system for large capacities.
    END

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