Mini project MEC 351 : REFRIGERATION AND air conditioning system

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Mini project MEC 351 : REFRIGERATION AND air conditioning system

PREPARED FOR : SIR MOHD FAHMI MD SALLEH BY : J4EM1105A (GROUP 5)

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Group members :

Muhammad norkhairie bin faharudin – 2018243256 Muhammad irfan haikal bin sidik – 2018279398 Aqil amirin bin japeriden – 2018247012 Muhammad faie’zun bin md fadzil – 2018655982

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01 introduction

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location:

Located in Jalan Mutiara Emas 2, Mount Austin, Johor Bahru , Johor

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Floor plan selection :

10' -o 20' General Office 1 Toilet Storage and Print Room 10' 72' 22' Meeting Room General Office 2 14' 10' Private office 1 Private office 2 14' 10' Toilet Note: wall thickness is 5" 4half brick wall with cement plaster height of the wall is 1 2ft Roof is concrete roof with suspended ceiling boards doors—4ft x 7 ft glass doors windows—6ft x 4ft glass windows with inside venetian blind medium colour all doors and windows are glass.

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Floor plan selection :

10' -o 20' General Office 1 Toilet Storage and Print Room 10' 72' 22' Meeting Room General Office 2 14' 10' Private office 1 Private office 2 14' 10' Toilet Note: wall thickness is 5" 4half brick wall with cement plaster height of the wall is 1 2ft Roof is concrete roof with suspended ceiling boards doors—4ft x 7 ft glass doors windows—6ft x 4ft glass windows with inside venetian blind medium colour all doors and windows are glass.

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Problem statement and objective:

PROBLEM STATEMENT: No air conditioning system applied to the office.

OBJECTIVE: need to calculate the cooling load estimation need to achieve humidity, temperature and odour need to pick the best design for ducting system need to allow air movement and distribute conditioned air within office space need to calculate the number of diffuser and total losses based on ducting design

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Problem statement and objective:

PROBLEM STATEMENT: No air conditioning system applied to the office.

OBJECTIVE: need to calculate the cooling load estimation need to achieve humidity, temperature and odour need to pick the best design for ducting system need to allow air movement and distribute conditioned air within office space need to calculate the number of diffuser and total losses based on ducting design

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02 methodology

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Methodology for calculation :

Identify dimension and size of each room (8 room total) Identify direction of building, wall thickness, wall dimension, roof material and floor raise Identify number of windows and door, and size of windows and door Analyse Air Psychrometric for the office Calculate Cooling Load Estimation on each room via Cooling Load Estimation Table: Solar Heat Gain (from direction of each wall and windows) Transmission Heat Gain (from wall and partition of offices) Internal Heat Gain (from number of people and heat produced by appliances) Outside Air Sensible (outside air depending on time and season) Room Latent Heat (heat generate from number people at full capacity) Outside Air Heat (sensible and latent heat ) * From Cooling Load Estimation Table : Calculate Grand Total Heat Calculate CFM by using formula CFM = RSH / (1.09 * 220F) on each room Obtain suitable total CFM value of 5487.91

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Process flow chart :

Design office layout together with dimension on each room Calculation of cooling load estimation on each room Determine condition of supply Identify type of system suitable for the office use Identify appropriate number of diffuser needed within required capacity Positioning diffusers on optimum location Positioning ducts system in optimum position Determine size of duct from friction method Complete the report and presentation for mini project

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Process flow chart (ducting system):

Obtain CFM value Identify type of system suitable for the office use Identify throw distance on each diffusers at each placement Identify type of material suitable for the ducting build Identify diffusers positioning Draw ducting system using AutoCAD Recalculate CFM value within total diffuser Find total duct friction loss

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Ducting system design drawing :

3 Toilet Toilet Room 10' 10' —4" 72' General Office 2 14' private offiee 2 14' wall thickness is 5" 4half brick wall with height of the wall is Roof is concrete roof with suspended ceiling boards doors—4ft x 7ft glass doors windows—6ft x 4ft glass windows with inside venetian blind medium colour all doors and windows are glass.

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Assumption of design requirement:

Room Wall Door Window Floor Occupancy Roof Lighting (fluorescent) Equipment General Office 1 Wall thickness is 5 inch 4 half brick 60lb/t2 Doors - 4ft x 7ft glass doors Inside venetian blind medium colour Windows - 6ft x 4ft glass windows Concrete floor (heat flow down) 6 persons Concrete roof with suspended ceiling boards 4 watt/ sq.ft - General Office 2 5 persons 4 watt/ sq.ft - Private Office 1 2 persons 5.8 watt/ sq.ft - Private Office 2 2 persons 5.8 watt/ sq.ft - Meeting Room 10 persons 8 watt/ sq.ft 5 units of laptops Storage And Printing Room 2 persons 4 watt/ sq.ft 1 unit of photocopy machine Receptionist 5 persons 1.5 watt/ sq.ft - Public Area 7 persons 1.5 watt/ sq.ft -

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03 result/design

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Cooling load estimation table:

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ROOM LAIE_XI HE A1

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Summary of cooling load:

Room RSH CFM Grand Total Heat Gain RLH ERSH ERLH ERTH General Office 1 17641.382 735.67 26440.382 1353 18086.102 2397.48 20483.582 General Office 2 14143.7494 589.81 20483.4494 1127.5 14455.0534 1858.636 16313.6894 Private Office 1 10985.755 458.12 14539.255 451 11171.055 886.2 12057.255 Private Office 2 15102.3994 629.79 18842.0494 451 15298.8174 912.312 16211.1294 Meeting Room 26534.915 1106.54 443164.915 385605 28387.915 389957 418344.915 Storage And Printing Room 10761.7246 448.78 155142.8246 140658.1 10984.0846 141180.34 152164.4246 Receptionist 32651.1064 1361.60 71008.6064 1127.5 34874.7064 6349.9 41224.6064 Public Area 22697.2724 946.51 61505.7724 1578.5 24920.8724 6800.9 31721.7724

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Proposed air-conditioning system:

HFC R-410ALine Up for Factories&lnd Offices We have entered an era in which being recognized as an environmentally tesr»nsible corp»rate citizen has taken utmost immrtance. Even when selecting air conditioners, a new featuring HFC IOA refrigerant could be the in promoting inuge- Product Line Up R-410A FLCX)R ST TYPE Capacity ECT TYPE Capacity mJCTTYPE TYPE tr«n pucr CCNNECTION DUCT TYPE A" via duds Nice , cool air in the factory or in the cafeteria

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Proposed air conditioning system:

unn Rurru current currert P r*er tutor AAN (H) FM StatR 380V D.rnenea-s Ws O raton ra Max hter',nit Max_ hga•atnn 3NYIG RUR13NY1 12010) 148 50 ISHP RURI SNYI 383-415 v. 2997 132_3 RUR18NY1 3 Phase. 4 Wres 212 1434 sa_6 24 8 m) coe 62-sx _zo«sso 14 to 25 _o.9_o POLYCL ESTER 319 2' to 46 .34 PS 1 B hread 70 m

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Justification on chosen system:

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Proposed diffuser:

SQUARE CEILING DIFFUSERS

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Proposed diffuser:

PERFORMANCE DATA Supply Square Ceiling Diffuser SAFID MODEL: SCD - 4 4-WAY AIR PATTERN Table 1 NECK SIZE 616 050 x to) 919 (225 x 225) 12x12 (300 x 300) 1Sxts (37S 37S) 18 x 18 (450 x 450) Neck Velocity Pressure Drop 200 a 012 €20 112 4-9 €20 6-11 €20 312 7-13 €20 450 300 coy 3-6 €20 €20 9-14 €20 468 t2-t8 €20 675 6-23 400 0.06 100 4-8 €20 8-11 €20 12-16 22 625 16-21 26 900 20-26 SOO 0.086 6-10 to-g 27 14-19 31 781 18-24 34 22-30 600 8-11 12 -16 30 17-22 20-27 38 24-32 700 10-14 14-18 0-24 22-29 1575 26-34 BOO 200 12-15 % -20 21-26 24-31 28-36 900 0.27 18-23 42 23-29 45 26-33 48 20B 30-38

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04 discussion and c onclusion

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summary of cfm:

Room CFM General Office 1 735.67 General Office 2 589.81 Private Office 1 458.12 Private Office 2 629.79 Meeting Room 1106.54 Storage And Printing Room 448.78 Receptionist 1361.60 Public Area 946.51

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Summary of grand total heat:

Room Grand Total Heat Gain General Office 1 26440.382 General Office 2 20483.4494 Private Office 1 14539.255 Private Office 2 18842.0494 Meeting Room 443164.915 Storage And Printing Room 155142.8246 Receptionist 71008.6064 Public Area 61505.7724

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Summary of ducting system calculation:

Section CFM Duct length(ft) FPM hf /100 hf (in w.g ) Round duct (inch) Rectangular duct A-B 6278 15.33 1500 0.1 0.01533 28 35 x 20 B-C 5331.49 9.083 1450 0.1 0.009083 26 29 x 20 C-D 458.12 11.75 800 0.1 0.01175 10 11 x 8 C-E 629.79 10.75 850 0.1 0.01075 12 15 x 8 C-F 4243.58 14.417 1400 0.1 0.014417 25 27 x 20 F-G 1106.54 11 1000 0.1 0.011 15 25 x 8 F-H 589.81 11.5 825 0.1 0.0115 11 13 x 8 F-I 2547.23 10.33 1200 0.1 0.01033 20 17 x 20 I-J 448.78 11.33 790 0.1 0.01133 10 11 x 8 I-K 2098.45 9 1180 0.1 0.009 18 14 x 20 K-L 735.67 11.75 900 0.1 0.01175 13 18 x 8 K-M 1361.60 12.92 1075 0.1 0.01292 15 28 x 8 Total Major Loss = 0.13916 w.g

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Conclusion:

In conclusion, air conditioning can be defined as a system for controlling the humidity, ventilation, and temperature in a building or vehicle, typically to maintain a cool atmosphere in warm conditions. Air conditioner also is a treatment of indoor air to control certain conditions required for human comfort. The desirable conditions may be temperature, humidity, dust particle level, odor level, and air motion. It is known that the physical properties of air can be controlled by cooling, heating, humidification, and dehumidification. HVAC is an important part of residential structures such as single-family homes, apartment buildings, hotels, and senior living facilities, medium to large industrial and office buildings such as skyscrapers and hospitals, vehicles such as cars, trains, airplanes, ships and submarines, and in marine environments, where safe and healthy building conditions are regulated with respect to temperature and humidity, using fresh air from outdoors. In this case, we are required to design a complete air conditioning system in an office building. Based on this project, there are a few of knowledge can be learned. One of the knowledge is to design a complete air conditioning system for an office building. Lastly, we also learned to use the AUTOCAD to create this mini project and help to design a floor plan of office building.

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References:

Energuide (N.D), “How much power does a computer use? And how much CO2 does that represent?” Available online : https://www.energuide.be/en/questions-answers/how-much-power-does-a-computer-use-and-how-much-co2-does-that-represent/54/ [Accessed July 15 2021] Saha.B ., 2018, “Air Conditioning: Definition, Factors and Types | Mechanical Engineering” Available online : https://www.engineeringenotes.com/mechanical-engineering/air-conditioning/air-conditioning-definition-factors-and-types-mechanical-engineering/36056 [Accessed July 15 2021] Daikin Malaysia, 2020, “FFN-C/ FCN-F SERIES (R410A)” https://www.daikin.com.my/daikin_products/ffn-c-fcn-f-series-r410a/ [Accessed July 15 2021] Bright Hub Engineering, 2010, “What is packaged air conditioner? Types of Packaged air Conditioners” Available online : https://www.brighthubengineering.com/hvac/61457-packaged-air-conditioners-types-of-packaged-ac/ [Accessed July 15 2021] Daikin global, 2021, “Packaged air conditioners for facilities & factories | For precise control of air and temperature to help preserve accurate results and product quality | Air conditioning and refrigeration” Available online : https://www.daikin.com/products/ac/lineup/packaged/ [Accessed July 15 2021] Package air conditioner parts and functions, “Air Conditioning Systems Tips and Guide” Available Online : https://www.airconditioning-systems.com/package-air-conditioner.html [Accessed July 15 2021] Admin_Temp.A ., 2020, “The Best Type Of Aircon For Offices” Available online : https://www.daikin.com.my/blog/tips/2020/01/24/type-of-aircon-offices/ [Accessed July 13 2021] Reddy.S , “Uses of AutoCAD” Available online : https://www.educba.com/uses-of-autocad/ [ Accessed July 15 2021 ] https:// www.energyrating.gov.au/sites/default/files/documents/sb200302-photocopiers_0.pdf

Energuide (N.D), “How much power does a computer use? And how much CO2 does that represent?” Available online : https://www.energuide.be/en/questions-answers/how-much-power-does-a-computer-use-and-how-much-co2-does-that-represent/54/ [Accessed July 15 2021] Saha.B ., 2018, “Air Conditioning: Definition, Factors and Types | Mechanical Engineering” Available online : https://www.engineeringenotes.com/mechanical-engineering/air-conditioning/air-conditioning-definition-factors-and-types-mechanical-engineering/36056 [Accessed July 15 2021] Daikin Malaysia, 2020, “FFN-C/ FCN-F SERIES (R410A)” https://www.daikin.com.my/daikin_products/ffn-c-fcn-f-series-r410a/ [Accessed July 15 2021] Bright Hub Engineering, 2010, “What is packaged air conditioner? Types of Packaged air Conditioners” Available online : https://www.brighthubengineering.com/hvac/61457-packaged-air-conditioners-types-of-packaged-ac/ [Accessed July 15 2021] Daikin global, 2021, “Packaged air conditioners for facilities & factories | For precise control of air and temperature to help preserve accurate results and product quality | Air conditioning and refrigeration” Available online : https://www.daikin.com/products/ac/lineup/packaged/ [Accessed July 15 2021] Package air conditioner parts and functions, “Air Conditioning Systems Tips and Guide” Available Online : https://www.airconditioning-systems.com/package-air-conditioner.html [Accessed July 15 2021] Admin_Temp.A ., 2020, “The Best Type Of Aircon For Offices” Available online : https://www.daikin.com.my/blog/tips/2020/01/24/type-of-aircon-offices/ [Accessed July 13 2021] Reddy.S , “Uses of AutoCAD” Available online : https://www.educba.com/uses-of-autocad/ [ Accessed July 15 2021 ] https:// www.energyrating.gov.au/sites/default/files/documents/sb200302-photocopiers_0.pdf