final practicum Riazul Islam.pptxrttrrtff

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1. A Study on HVAC Design, Installation and Troubleshooting of Water- Cooled Chiller System, Cooling Tower and Air Handling Unit Under Utility Professionals Presented by Md. Riazul Islam Mamun ID-19207016 Department of BSME, IUBAT

2. Presentation Contents Introduction Objective of Internship Company Profile Basic Refrigeration Cycle Basic Component of Cooling Cycle Comparison between HVAC systems Dx System Window Unit Central Packaged Unit Chilled Water System Air Handling Unit (AHU) Fan Coil Unit (FCU) Water chillers Basic cycle HVAC Systems for Hospitals Food and Frozens and Hospitals

3. Heating, ventilation, and air conditioning (HVAC) is the use of various technologies to control the temperature, humidity, and purity of the air in an enclosed space. HVAC is an important part of residential structure such as homes and apartment and also industry etc. Introduction

4. Objective of Internship: To gain practical experience in HVAC systems, including installation, maintenance, and repair. Acquire knowledge of different HVAC systems, including their components, functions, and how they interact within buildings. Develop troubleshooting skills by diagnosing issues in HVAC systems and implementing effective solutions. Build professional relationships with mentors, colleagues, and industry professionals for future career opportunities.

5. Company Details and Address: Utility Professionals is an engineering organization established in 2004 and embraced by a group of professional engineers. This organization is involved in MEP design and consultancy. An MEP (Mechanical, Electrical, and Plumbing) consultancy plays a crucial role in the design, planning, and execution of building projects. Company Location: House: 38 (Level 1 & 2), Block: B, Road: 7 Banasree , Rampura, Dhaka-1219, Bangladesh

6. Sector of Services:   Commercial & Big Residential buildings Hospitals and Laboratories Hotels and Resorts Academic & Institutional Buildings Embassy Buildings Food Industries Ready Made Garments, Dyeing, Pharmaceuticals Clean Room - GMP Compliance & Validation Other Industries with critical applications Power Station with Township Special Projects like Metro Rail, BEZA, Airports, Rail Station Township, Industrial Zone, Hi-Tech Park, etc. Environmental Impact Assessment

7. Company Profile:

8. Company Profile: Mission: -To maintain an engineering professional team -To maintain professionalism with integrity and sincerity To build up long term relationship with valued client To achieve this all of our staffs are continually trained up on Technology update and Professional practice. Vision To become a global identity in MEP consulting services recognized for delivering unsurpassed value to customers by providing innovative, intelligent, efficient, economical, effective, energy-efficient, environmentally friendly, and aesthetic MEP infrastructure design and services. Achievement : ISO 9001-2015 certification Enlisted as Number 1 Consultant under Fire Service and Civil Defence Enlisted Consultants of many multinational companies Working experience with many foreign Consultants as their local associate

9. Facility Design Work Flow Sequence

10. V VENTILATION AC AIR-CONDITIONING Heating cycles H HEAT Exhaust, Supply, Balanced Basic cooling cycle HVAC

11. INDUSTRIAL COMFORT ENVIRONMENT Provide required temperature and humidity; to perform specific industrial processes successfully. Provide suitable conditions in the space in which humans can work, live and sleep. SCOPES OF HVAC

12. BASIC REFRIGERATION CYCLE

13. BASIC COMPONENTS OF COOLING CYCLE FREON REFREGIRANT COMPRESOR Condenser coil EXPANSION VALVE

14. Comparison between HVAC systems DIRECT EXPANSION SYSTEM (DX) CHILLED WATER SYSTEM Air is cooled by Freon Low Initial Cost High running cost Easy maintenance Hard to find leaks Cooling is done by chilled water which is cooled by Freon High initial cost Low running cost Complicated design & maintenance Leaks are easily detected

15. HVAC System Dx System Fan coil unit Air Handling Unit Chilled water system Central split Mini split Split units Package units Floor ceiling High wall Central package Window concealed cassette vertical Roof top unit

16. A.The Package DX Unit Dx system: There are two types of package dx units, such as window and central: They can be the best option for any Home, additionally, they come into different foot-prints: Small or Large; depending on BTU/Ton and requirements for a home. Package units will contain all of their parts in one outdoor unit that sits on either the roof or to the side of a building. They can be a good option for any home with the right ductwork.

17. 1.Window Unit : All component in one piece Cooling Capacity Up To 4 TR Easy To Install Easy To Maintenance Don’t need ducts Advantages Disadvantages But there are a noise needs a large hole in the wall

18. 2.Central packaged unit : -Rooftop unit (most popular) -vertical unit The are two types : Rooftop Units Save Space High cooling capacity up to 150TR They are popular for commercial and factory building They need a ducts to distribute the air They come into various sizes due to the load There are no noise in the place Maintenance can be carried out without disrupting activities This system may be connected to ductwork and serve a large-size single zone that cannot be served by window air conditioners.

19. B. Split units : 1.Mini split : cooling capacity higher than window type Used in Administrative buildings, Residential buildings, Stores, etc. Allow you to control the temperatures in individual rooms or spaces. outdoor compressor/condenser indoor air- handling unit(s) (evaporator). Two main components : High Wall

20. Ceiling-floor Cassette VRF System

21. 2.Concealed / Central split unit : Quietest air conditioning choice The indoor unit is situated above the ceiling and well away from the users. Air outlets are quick and easy to install Floor standing (free standing)

22. Chilled water system : L ower maintenance costs A prepackaged system for easier design and installation Better performance in freezing temperature A ir-cooled chiller Water-cooled chiller Greater energy efficiency Larger capacities & Longer equipment life C ost-efficient. N on-corrosive non-toxic U seful for the big commercial buildings Yet, the best choice for the project may also depend on an entirely different set of decisions criteria. It’s important for data centers and system designers to take all factors into consideration to make sure the chiller that ultimately gets specified balances all the objectives over the long term

23. Water chillers are backbone of HVAC cooling systems.Water chiller produces chilled water ( Approx 7 Degree C ~ 12 Degree C). Water chillers Basic cycle : A thermodynamic process occurs in each of chillers. Theoretical working of Vapor compression or compression chillers

24. Air handling unit (AHU) : 1.Pre-filter 2.Bag filter 3.HEPA filter 4.Cooling coil 5.Air volume control damper 6.Mixing box 7.Humidification 8.Fan section Consist of :

25. 100% fresh air supply Mixed air supply

26. FAN COIL UNIT (FCU): Consist of: 1. Pre-filter 2. Fan section 3. Cooling coil 4. Electric heater 5. Drain pan FCU is used to condition the local air to suit the temperature requirements of the immediate space, like: · Offices · Hotels

27. Filters Pre filter Bag filter Air volume control damper for AHU

28. HVAC applications & selection R e s iden t ial buildings H otels Office buildings M alls Hospitals Oil & Gas industry T ele c om industry Frozen food s t orages Farm animals Applications Buildings Industry

29. It’s a critical environment which we should make sure to have certain specifications designing its HVAC system: The design objectives include: And the most important is how to achieve the proper conditioning conditions are by: 1. Control of temperature. 2. Control of humidity. 3. Air movement and distribution. 4. Air cleaning and filtration. Fresh air Rooms positive pressure Providing steady and smooth air movement High air quality by using a high-performance filters HVAC Systems for Hospitals:

30. Many spaces in hospitals require maintenance of a differential pressure relative to adjacent spaces. For exa m ple, O R s, pro t e cti v e isolation, supply req u ire positive pressure Whereas airborne infectious isolation, toilet, soiled, bronchoscopy, and decontamination rooms require negative pressure The purposes of the HVAC system in an operating room (OR) are to minimize infection, maintain staff comfort, and maintain patient comfort.

31. Frozen food s t orages : Objectives : Ensure that the temperature is accurately maintained Accurate cooling and good air movement Refrigeration can reduce the risk of all of these bacterial infections. Cold temperatures inhibit the growth of microorganisms that cause foodborne illness

32. Hotels Running and maintenance cost The design objectives include Variable refrigerant flow (VRF) units Are the commonly used in hotels 5 things to consider 1 – Hot sanitary water 2 – Low noise 3 – Building load variation 4 – Water flow variation 5 – Monitoring units’ operations Hotels often rely on guest satisfaction to determine if they are providing excellent service BENEFITS OF H-VRF AS THE HVAC Water based on the consumer side Suitable for modular installation without the need to decommission the whole system Even simpler operation for consumers with one button controllers  Smaller pipework within the consumer spaces 

33. Conclusion