Republic of the Philippines PANGASINAN STATE UNIVERSITY College of Engineering & Architecture Urdaneta City Campus

CENTRALIZED AIR - CONDITIONING DESIGN

PREPARED BY: GROUP 3 BSME V

SUBMITTED TO; ENGR. REYNALDO C.LOMBOY INSTRUCTOR

MEMBERS:GEMAR ASENIEROMARK RENBEL PARANVERNON RYAN TENOSOTERRENCE CLAIRE MARILAOYVONY MANAOATJANE GAPUDJOEL AGUSTIN

MATERIAL SPECIFICATIONSOUTSIDE WALL ---- Sand & Gravel Aggregate, 8 in. thickPARTITION ---- FLOOR ---- Sand & Gravel Aggregate, 8 in. thickCEILING ---- Board Plain, Sand & Gravel Aggregate

WEIGHT PER SQUARE FEET OF FLOOR AREATHIRD FLOOR

ROOMOUTSIDE WALL ()PARTITION()FLOOR()CEILING()TOTAL()

IPPRO15ss.274443.062039.579176.8364

LECTURE HALL 113.268625.956639.579157.7252

LECTURE HALL 213.268625.956639.579157.7252

LECTURE HALL 313.921426.713039.579159.1344

DRAWING ROOM A29.053417.102539.579164.6559

DRAWING ROOM B13.012928.869939.579160.3828

DRAWING ROOM C16.12536.128439.579170.7534

DRAWING ROOM D13.92127.48139.579159.902

1307.115

COOLING LOAD OF GLASSFORMULA:Q = A SLF SC CF PLFBASIS:WHERE;DESIGN MONTH -------- APRILA = GLASS AREA, (ft2)LOCATION --------------- PHILIPPINES SLF = STORAGE LOAD FACTOR (from TABLE 7, CARRIER)LATITUDE ---------------- NORTHSC = SHADING COEFFICIENT (from TABLE 16, CARRIER)CF = CORRECTION FACTOR (for STEEL CASEMENT, CF = 1)PLF = PEAK LOAD FACTOR, (Btu/ (hr-ft2)) (from TABLE 6, CARRIER)

ROOMAREA (ft2)NUMBER OF UNITWINDOW TYPEEXPOSURESLFSCCFPLFQ (Btu/Hr.)

IPPRO38.75391STEEL CASEMENTEAST0.63111633979.638

LECTURE HALL 138.75392ANALOK BUILDING WINDOWWEST0.52111636569.5611

LECTURE HALL 238.75392ANALOK BUILDING WINDOWWEST0.52111636569.5611

LECTURE HALL 338.75392ANALOK BUILDING WINDOWSOUTH0.6411261289.7298

DRAWING ROOM A38.75392ANALOK BUILDING WINDOWEAST0.63111637959.276

38.75392ANALOK BUILDING WINDOWSOUTH0.6411261289.7298

DRAWING ROOM B38.75392ANALOK BUILDING WINDOWEAST0.63111637959.276

DRAWING ROOM C38.75393ANALOK BUILDING WINDOWEAST0.631116311938.914

DRAWING ROOM D38.75392ANALOK BUILDING WINDOWNORTH0.7901110

COOLING LOAD OF WALLSFORMULA:Q = A U TWHERE;A = AREA OF WALL, (ft2)U = TRANSMISSION COEFFICIENT (table 21)T = EQUIVALENT TEMPERATURE DIFFERENCEFrom TABLE 21, CARRIERFOR HOLLOW CONCRETE BLOCKS, SAND & GRAVEL AGGREGATE at 5/8 PLASTER ON WALL SAND AGGREGATE.U = 0.48 = to ti = F

RoomArea(ft2)UTQ(Btu/Hr)

IPPRO125.950.4830.61849.9536

LECTURE HALL 1803.17370.48 30.611797.0153

LECTURE HALL 2803.17370.4830.611797.0153

LECTURE HALL 3 302.22080.4830.64439.0191

DRAWING ROOM A630.72180.4830.69264.0418

DRAWING ROOM B232.52320.4830.63415.3001

DRAWING ROOM C290.653900.4830.64269.1245

DRAWING ROOM D222.83470.4830.63272.9961

COOLING LOAD OF OCCUPANTSFORMULA:Q = (SH + LH) (NUMBER OF OCCUPANTS)WHERE;SH = SENSIBLE HEATLH = LATENT HEATSENSIBLE AND LATENT HEAT VALUES taken from ASHRAE Handbook 1989

ROOMOCCUPANTSDEGREE OF ACTIVITY

SH(Btu/Hr)LH(Btu/Hr)Q (Btu/Hr)

IPPROSTUDENTS AND FACULTIESSeated, Very light work52451552000

LECTURE HALL 1STUDENTSSeated, Very light work10024515540000

LECTURE HALL 2STUDENTSSeated, Very Light work10024515540000

LECTURE HALL 3STUDENTSSeated, Very Light work8024515532000

DRAWING ROOM ASTUDENTSSeated, Very Light work4024515516000

DRAWING ROOM BSTUDENTSSeated, Very Light work5024515520000

DRAWING ROOM CSTUDENTSSeated, Very Light work5024515520000

DRAWING ROOM DSTUDENTSSeated, Very Light work4024515516000

COOLING LOAD OF APPLIANCES

For Appliances found in TABLE 50 & 51, CARRIER.FORMULA:Q = [(SENSIBLE HEAT 0.5) + (LATENT HEAT 0.5)] (HOURS of OPERATION/24 HOURS) (STORAGE LOAD FACTOR)

For Appliances which are not available in TABLE 50 & 51, CARRIER.FORMULA:Q = (WATTAGE/1000 KW) (3413 (Btu/Hr)/KW) (NUMBER OF UNITS) (HOURS of OPERATION/24 HOURS) (STORAGE LOAD FACTOR) WHERE;1KW = 3413 Btu/HrSLF = STORAGE LOAD FACTOR, (from TABLE 12, CARRIER)

ROOMAPPLIANCESWATTAGENUMBER OF UNITSHOURS OF OPERATIONSLFQ (Btu/Hr)

IPPROComputer9302100.932459.919

Photocopy Machine250140.86122.299

Printer77150.8848.1801

LECTURE HALL 1Projector14921100.931973.226

LECTURE HALL 2Projector14921100.931973.226

LECTURE HALL 3Projector14921100.931973.226

DRAWING ROOM AProjector14921100.931973.226

DRAWING ROOM BProjector14921100.931973.226

DRAWING ROOM CProjector14921100.931973.226

DRAWING ROOM DProjector14921100.931973.226

COOLING LOAD OF LIGHTS

For INCANDESCENT LIGHT:FORMULA:Q = WATTAGE 3.4 NUMBER of UNITS HOURS of OPERATION/24 HOURS STORAGE LOAD FACTOR

For FLUORESCENT LIGHT:FORMULA:Q = WATTAGE 3.4 1.25 NUMBER of UNITS HOURS of OPERATION/24 HOURS STORAGE LOAD FACTOR WHERE;SLF = STORAGE LOAD FACTOR, (from TABLE 12, CARRIER)

ROOMTYPE (WATTAGE)NUMBER OF UNITSHOURS OF OPERATIONSLFQ (Btu/Hr)

IPPROFluorescent(36)2100.96122.4

LECTURE HALL 1Fluorescent(36)4100.96244.8

LECTURE HALL 2Fluorescent(36)4100.96244.8

LECTURE HALL 3Fluorescent(36)4100.96244.8

DRAWING ROOM AFluorescent(36)4100.96244.8

DRAWING ROOM BFluorescent(36)5100.96306

DRAWING ROOM CFluorescent(36)5100.96306

DRAWING ROOM DFluorescent(36)4100.96244.8

COOLING LOAD OF ROOFFORMULA:Q = A U TWHERE;A = AREA OF ROOF, (ft2) U = TRANSMISSION COEFFICIENT, FROM TABLE 28, CARRIERT = EQUIVALENT TEMPERATURE DIFFERENCE = F

ROOMAREA(ft2)UTQ (Btu/Hr)

IPPRO354.5710.2730.62929.4656

LECTURE HALL 1753.54730.2730.66225.8078

LECTURE HALL 2753.54730.2730.66225.807

LECTURE HALL 3688.28470.2730.65686.6082

DRAWING ROOM A688.28470.2730.65686.6082

DRAWING ROOM B768.34910.2730.66348.1003

DRAWING ROOM C775.07720.2730.66403.6878

DRAWING ROOM D688.28470.2730.65686.6082

SUMMARY OF COOLING LOADSTHIRD FLOOR

LOCATONGLASS (Btu/Hr)WALLS (Btu/Hr)OCCUPANTS (Btu/Hr)APPLIANCES (Btu/Hr)LIGHTS (Btu/Hr)ROOF (Btu/Hr)Q (Btu/Hr)

IPPRO3979.6381849.953620002630.399122.42929.465613511.86

LECTURE HALL 16569.561111797.0153400001973.226244.86225.807866810.41

LECTURE HALL 26569.561111797.0153400001973.226244.86225.807866810.41

LECTURE HALL 31289.72984439.0191320001973.226244.85686.608245633.38

DRAWING ROOM A9249.0069264.0418160001973.226244.85686.608242417.68

DRAWING ROOM B7959.2763415.3001200001973.2263066348.100340001.9

DRAWING ROOM C11938.9144269.1245200001973.2263066403.687844890.95

DRAWING ROOM D03272.9961160001973.226244.85686.608227177.63

347254.2

SUPPLY DUCT SIZING

AIR QUANTITY () =

Where; = Temperature of outside air = Temperature of the room air

AREA OF DUCT () = Where;AIR VELOCITY FOR MAIN DUCT = 2000 AIR VELOCITY FOR BRANCH DUCT = 1600

DUCT DIMENSIONS WERE TAKEN FROM TABLE 6, CARRIER

THIRD FLOOR

LOCATION (Btu/Hr)AIR QUANTITY ()RequirementAIR QUANTITY ()ApproximateAREA OF DUCT ()DUCT SIZE (in)

IPPRO13511.86408.8556044090.25562510 x 6

LECTURE HALL 166810.412021.61734420221.2637520 x 10

LECTURE HALL 266810.412021.61734420221.2637520 x 10

LECTURE HALL 345633.381380.8212313810.86312514 x 10

DRAWING ROOM A42417.681283.51730812840.802514 x 10

DRAWING ROOM B40001.91210.4181812110.75687512 x 10

DRAWING ROOM C44890.951358.035602813580.8487518 x 8

DRAWING ROOM D27177.63822.36837338230.51437514 x 6

MAIN SUPPLY DUCT347254.210507.50781 10510105105.25548 x 18

DUCT AREA PERCENTAGE WERE DETERMINED USING TABLE 13, CARRIERDUCT DIMENSIONS WERE TAKEN FROM TABLE 6, CARRIER

SUPPLY MAIN DUCT

SECTIONCFMCFM %DUCT AREA %AREA (ft2)DUCT SIZE (in)

A105101001005.25514 x 6

A-B968792944.939744 x 18

B - C92788890.54.75575542 x 18

C - D589856643.363230 x 18

D - E26652532.51.70787528 x 10

E12841218.50.97217514 x 10

DUCT AREA PERCENTAGE WERE DETERMINED USING TABLE 13, CARRIERDUCT DIMENSIONS WERE TAKEN FROM TABLE 6, CARRIER

SUPPLY BRANCH DUCT

SECTIONCFMAREA (ft2)DUCT SIZE (in)

A - 18230.51437514 x 6

1 - 2411.50.257187510 x 6

1 - 3411.50.257187510 x 6

B - 44090.25562510 x 6

C - 520221.2637520 x 10

5 - 6808.80.505510 x 8

5 - 71231.20.8530312516 x 8

7 - 8808.8 0.505510 x 8

7 - 9404.40.2527510 x 6

C - 1013580.8487518 x 8

10 - 11814.80.5092510 x 8

10 -1 2543.20.339510 x 6

D - 1320221.2637520 x 10

13 - 14808.80.505510 x 8

13 - 151231.20.8530312516 x 8

15 -16808.8 0.505510 x 8

15 - 17404.40.2527510 x 6

D -1812110.75687512 x 10

18 -19 726.60.45412512 x 6

18 -20484.40.3027510 x 6

E -2113810.86312514 x 10

21 -22828.60.51787510 x 8

21 - 23552.40.3452510 x 6

E - 2412840.802514 x 10

24 - 25834.60.52162510 x 8

25 - 26449.40.28087510 x 6

SIZING OF RETURN DUCT

EXHAUST AIR QUANTITY = 20% (AIR QUANTITY)

AREA OF DUCT () = Where;AIR VELOCITY FOR MAIN EXHAUST DUCT = 1500 AIR VELOCITY FOR BRANCH EXHAUST DUCT = 1200

DUCT DIMENSIONS WERE TAKEN FROM TABLE 6, CARRIERTHIRD FLOOR

LOCATIONAIR QUANTITY () RETURN AIR QUANTITY ()AREA OF DUCT ()DUCT SIZE (in)

IPPRO408.85560481.77112080.0681426006710 x 6

LECTURE HALL 12021.617344404.32346880.33693622410 x 6

LECTURE HALL 22021.617344404.32346880.33693622410 x 6

LECTURE HALL 31380.82123276.1642460.230136871710 x 6

DRAWING ROOM A1283.517308256.70346160.213919551310 x 6

DRAWING ROOM B1210.41818242.0836360.201736363310 x 6

DRAWING ROOM C1358.0356028271.60712060.226339267210 x 6

DRAWING ROOM D822.3683733164.47367470.137061395610 x 6

HALLWAY20.370370374.074074074.00271604910 x 6

MAIN RETURN DUCT10507.50781 105102105.588236 21101.406666718 x 12

EQUIPMENTDUCT FITTINGSRectangular Duct Rectangular Duct Sharp Throat Radius ElbowRectangular Duct Square TeeRectangular Duct Angle Concentric TaperRectangular Duct Cross Round to Rectangular Duct TransitionDIFFUSERS500 x 500 mm Square Louver Face Ceiling Diffuser 150 mm NeckRETURN 500 x 500 mm Square Louver Face Ceiling Return 150 mm Neck

DUCT LAYOUT FOR 3rd FLOOR

SUPPLY BLUERETURN - RED

FAN SIZE COMPUTATION AND SELECTION

THIRD FLOOR TOTAL EQUIVALENT DUCT LENGTH

SECTIONITEMEQUIVALENT LENGTH(ft.)

To ADUCT45.4148

ELBOW12

B CDUCT22.6617

C DDUCT37.8767

D EDUCT27.8892

E 24DUCT24.995

ELBOW6

24 26DUCT101.84 8.8467

ElevationDUCT35.4331

TOTAL218.1172 220

FRICTION RATE WERE TAKEN FROM CHART 7, CARRIER

at Air Quantity = 22210 cfm Air Velocity = 2000 fpm

Friction Rate = 0.09 in wg PER 100 FOOT OF EQUIVALENT LENGTH

TOTAL FRICTION LOSS (in. wg) = (EQUIVALENT LENGTH ) (FRICTION RATE)

= = 0.198 in wg

TERMINAL PRESSURE (in. wg) = 0.052846 in wg (from Duct Calculator)

REGAIN = at Velocity at Initial Section = 2000 fpm Velocity at Final Section = =1599 fpm

=

= 0.06765 in wg

TOTAL STATIC PRESSURE (in. wg) = FRICTION LOSS + TERMINAL PRESSURE REGAIN = 0.198 in wg + 0.052846 in wg - 0.06765 in wg = 0.183196 in wg

SINCE THE FIRST FLOOR HAS THE HIGHEST STATIC PRESSURE, THE COMPUTED STATIC PRESSURE AT THE FIRST FLOORWIL SERVE WILL AS THE BASIS FAN SIZE SELECTION

Page | 3