HKIS –PQSL (16 Nov 2015) · hkis –pqsl (16 nov 2015) sr. kenny lui bsc, llb, mmgt, macs mhkis,...
Transcript of HKIS –PQSL (16 Nov 2015) · hkis –pqsl (16 nov 2015) sr. kenny lui bsc, llb, mmgt, macs mhkis,...
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HKIS – PQSL (16 Nov 2015)Sr. Kenny LuiBSc, LLB, MMgt, MACSMHKIS, MRICS, RPS(QS), PFM
BASIC UNDERSTANDING OF MVAC SYSTEM AND MEASUREMENT
Prepared by: Kenny Lui 1
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What are we going to cover tonight?
What is MVAC System?How to measure it from a QS perspective?
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Disclaimer Note
This set of notes has been prepared according to the author’s own experience of therelevant practice and is intended for educational purpose and information only. Noresponsibility for loss occasioned to any person acting or refraining from actionoccasioned by or as a result of any material included will be accepted by the authoror its company.
The materials and information contained herein are not intended to offer or provideany technical advice concerning the topics covered. Please consult professionalengineers or your QS senior where necessary.
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What is MVAC System?
MVAC
HVAC ACMV
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What is MV?
MVA. Music VideoB. Mechanical Ventilation
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What is AC?
ACA. Alternating CurrentB. Air Conditioning
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What is MVAC System?
ACMV
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MV System
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MV SystemAxial Fans
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MV SystemCentrifugal Fans
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MVAC System
http://chemistry.bd.psu.edu/jircitano/gases.html
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MVAC System
P T
P T
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MVAC SystemWindow Type Air‐Conditioners Moveable Air‐Conditioners
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MVAC SystemWall Air Conditioners Ceiling Mounted / Cassette Air‐Conditioners
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Chillers Cooling towers
Air handling units
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Fan Coil Units
Pipeworks to / from Fan Coil Units
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Chilled water pipeworks Insulation
Protective Coverings and Finishings
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Ductwork Insulation
Protective Coverings and Finishings
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MVAC System
Chiller AHU / FCU
CHWS
CHWR
Fresh Air Duct
Supply Air Duct
Return Air Duct
Air Grilles
Condensate DrainCondensate Drain
Electrical and Control
PAU
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MVAC SystemWhat do you hear tonight
What do we not discuss / explore tonight
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MVAC SystemFurther Reading / Study
http://www.airintelligence.co.uk/wp‐content/uploads/2012/10/cooling‐cooling.jpg
http://ac2015.net/posts/air‐conditioner‐working‐principle/
https://www.youtube.com/watch?v=_lFUlA1PZ8U
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How to measure it from a QS perspective?
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Preparation for Measurement
Drawings
Specifications / Codes of Practices
Standard Method of
MeasurementPreambles
Sample Bills
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Preparation for Measurement
DrawingsSpecifications / Codes of PracticesStandard Method of MeasurementPreamblesSample Bills, if any
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DrawingsLegend, Notes & Abbreviations
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DrawingsLegend, Notes & Abbreviations
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DrawingsLayout
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DrawingsLayout
Fresh Air Louvre –Builder’s Trade
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DrawingsLayout
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DrawingsLayout
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At Roof Level
At 1/F
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DrawingsEquipment Schedule
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DrawingsEquipment Schedule
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DrawingsSchematic (Water side)
Plant RoomArea
Non‐Plant Room Area
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DrawingsSchematic (Water side)
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DrawingsSchematic (Air side)Mech. Vent.
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DrawingsSchematic (Air side)A/C
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DrawingsMVAC Provision Zoning
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DrawingsTypical Details
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DrawingsCable Schedules
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DrawingsElectrical Schematic
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DrawingsControl Schematic
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DrawingsLegend, Notes & Abbreviations
Schematic (Air side) A/CSchematic (Air side) Mechanical Ventilation
Typical DetailsElectrical and Control
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Preparation for Measurement
DrawingsSpecifications / Codes of PracticesStandard Method of MeasurementPreamblesSample Bills, if any
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Specification / Code of Practice
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Specification / Code of Practice
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Preparation for Measurement
DrawingsSpecifications / Codes of PracticesStandard Method of MeasurementPreamblesSample Bills, if any
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HKSMM 4
Always modified by Preamble
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HKSMM 4INFORMATION PROVIDED MEASUREMENT RULES DEFINITION RULES COVERAGE RULES
SUPPLEMENTARY INFORMATION
Qty
Classification Table Supplementary Rules
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HKSMM 4
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HKSMM 4
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HKSMM 4
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HKSMM 4
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HKSMM 4
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HKSMM 4
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HKSMM 4
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HKSMM 4
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HKSMM 4
A.
B.
C.
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HKSMM 4
MEASUREMENT RULES
M.2 Pipework is measured over all inline fittings, short running lengths and branches, but not through items of ancillaries, headings and trapping sets.
M.3 Where an in‐line reduction in diameter occurs at a reducer or tee etc., the largest diameter shall be measured the full length of the fitting.
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HKSMM 4
C.
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HKSMM 4
DEFINITION RULES
D.2 Final supports are any element between the structure or the support structureand the pipe.D.3 The term pipework fittings isdeemed to include:(a) Bends, (b) Elbows, (c) Branches, (d) Reducers, (e) Tees,(f) Reducing bends, (g) Reducing tees, (h) Caps, (i) Flanges, and the like.
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HKSMM 4
COVERAGE RULESC.2 Pipework is deemed to include:(a) Fittings for pipes
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HKSMM 4In‐line fittings
Accessories
Ancillaries
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HKSMM 4
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HKSMM 4
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HKSMM 4
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HKSMM 4
MEASUREMENT RULES
M.2 Ductwork rectangular in section is measured over all in‐line fittings, short running lengths and branches, (but not through items of inline equipment).
M.3 Where an in‐line reduction in size (given by circumference/perimeter) occurs at a reducer or tee etc. the largest size shall be measured for the full length of the fitting.
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HKSMM 4
COVERAGE RULES
C.2 Work is deemed to include all in‐line fittings
C.3 Work is deemed to include all cutting of ductwork to fittings, equipment and ancillaries, and providing all necessary materials, heat, bolts, nuts, washers and everything necessary for making joints and connections.
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HKSMM 4
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HKSMM 4
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Preparation for Measurement
DrawingsSpecifications / Codes of PracticesStandard Method of MeasurementPreamblesSample Bills, if any
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Preambles
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Preambles
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Preambles
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Preambles
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Preambles
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Preambles
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Preambles
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Preambles
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Preambles
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Preambles
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Preparation for Measurement
DrawingsSpecifications / Codes of PracticesStandard Method of MeasurementPreamblesSample Bills
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Sample Bills
https://www.archsd.gov.hk/media/38193/Model_Bill_2012.pdf
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Sample Bills
https://www.archsd.gov.hk/media/38193/Model_Bill_2012.pdf
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Sample Bills
https://www.archsd.gov.hk/media/38193/Model_Bill_2012.pdf
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Sample Bills
https://www.archsd.gov.hk/media/38193/Model_Bill_2012.pdf
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Sample Bills
https://www.archsd.gov.hk/media/38193/Model_Bill_2012.pdf
Cross reference to drawings or specification
Type and duty stated
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Sample Bills
https://www.archsd.gov.hk/media/38193/Model_Bill_2012.pdf
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Sample Bills
https://www.archsd.gov.hk/media/38193/Model_Bill_2012.pdf
Type of material
Size, gauge or thickness and type stated
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Sample Bills
https://www.archsd.gov.hk/media/38193/Model_Bill_2012.pdf
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Sample Bills
https://www.archsd.gov.hk/media/38193/Model_Bill_2012.pdf
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Sample Bills
https://www.archsd.gov.hk/media/38193/Model_Bill_2012.pdf
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Sample Bills
https://www.archsd.gov.hk/media/38193/Model_Bill_2012.pdf
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Sample Bills
https://www.archsd.gov.hk/media/38193/Model_Bill_2012.pdf
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Sample Bills
https://www.archsd.gov.hk/media/38193/Model_Bill_2012.pdf
To be discussed in Electrical and Control Sections
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Sample Bills
https://www.archsd.gov.hk/media/38193/Model_Bill_2012.pdf
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Sample Bills
https://www.archsd.gov.hk/media/38193/Model_Bill_2012.pdf
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Sample Bills
https://www.archsd.gov.hk/media/38193/Model_Bill_2012.pdf
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Sample Bills
https://www.archsd.gov.hk/media/38193/Model_Bill_2012.pdf
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Sample Bills
https://www.archsd.gov.hk/media/38193/Model_Bill_2012.pdf
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A ReminderEquipment
Pipework
Pipework in‐line fittings / ancillaries
Ductwork (rectangular)
Ductwork (circular / oval)
Ductwork in‐line fittings / ancillaries
nr
nr
nr
m
m
m2
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A Reminder
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Chilled water pipeworks Insulation
Protective Covering and Finishing
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Chilled water pipeworks
What about: InsulationProtective Covering and Finishing
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Chilled water pipeworks / Insulation / Protective Covering and Finishing
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Chilled water pipeworks / Insulation / Protective Covering and Finishing
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Ductwork Insulation
Protective Coverings and Finishings
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Ductwork / Insulation / Protective Covering and Finishing
Insulation to rectangular ductwork is measured the nett area in contact with the base of all ducting as installed and overall ducting fittings and joints
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Ductwork / Insulation / Protective Covering and Finishing
Protective coverings and finishings to insulated rectangular ductwork is measured the nett area in contact with the base of all ducting as installed and overall ducting fittings and joints
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Disclaimer Note
This set of notes has been prepared according to the author’s own experience of therelevant practice and is intended for educational purpose and information only. Noresponsibility for loss occasioned to any person acting or refraining from actionoccasioned by or as a result of any material included will be accepted by the authoror its company.
The materials and information contained herein are not intended to offer or provideany technical advice concerning the topics covered. Please consult professionalengineers / your QS senior where necessary.