hvac air conditioning designing for ncet auditorium

International Journal of Scientific Research and Engineering Development-– Volume 4 Issue 3, May-June 2021

Available at www.ijsred.com

ISSN : 2581-7175 ©IJSRED:All Rights are Reserved Page 573

HVAC (Air Conditioning Designing for NCET Auditorium)

Mohammed Abdul Azeem1, Mahendra G

2, Rahul R S

3, Mridhul Soni

4, Mr. Shashikanth G S

5

12345 Nagarjuna College of engineering and technology, Bangalore

Abstract

The heating, ventilation, and air-conditioning (HVAC) system is arguably the most complex

system installed in a building and is responsible for a substantial component of the total building energy

use. A right-sized HVAC system will provide the desired comfort and will run efficiently, Right-sizing of

an HVAC system is the selection of equipment and the design of the air distribution system to meet the

accurate predicted heating and cooling loads of the house. The load calculation is the first step of the

iterative HVAC design procedure, The equipment selection and the air distribution design are dependent

upon the loads of the system.

.Keywords: - HVAC, Duct,Designing, HAP4.90, Drafting, Load Calculation.

1. Introduction

HVAC (heating, ventilating, and air

conditioning) refers to the equipment, distribution

network, and terminals that provide either

collectively or individually the heating,

ventilating, or air-conditioning processes to a

building. HVAC system design is a major sub

discipline of mechanical engineering, based on the

principles of thermodynamics, fluid mechanics,

and heat transfer. HVAC systems provide:

• Heating

• Cooling

• Air handling, ventilation, and air quality HVAC

accounts for 40 to 60 percent of the energy used

in U.S. commercial and residential buildings. This

represents an opportunity for energy savings using

proven technologies and design concepts. The

American Society of Heating, Refrigerating and

Air-Conditioning Engineers, Inc. (ASHRAE)

supplies technical information to engineers and

other professionals.

In addition, ASHRAE writes standards

and guidelines in its field of expertise to guide

industry in the delivery of goods and services to

the public. HEATING There are different types of

standard heating systems. Central heating is often

used in cold climates to heat private houses and

public buildings. Such a system contains a boiler,

furnace, or heat pump to heat water, steam, or air,

all in a central location.

The major benefit of the system-based

design approach, of course, is that it gives the

engineer exactly what is needed to design a

system. Specific sizing data is provided instead of

raw material for further hand calculations. The

result is increased productivity for the designer

because the computer is being put to work more

effectively. The computer does a complete job of

system sizing, not a partial job.

A related benefit is that the system-based

approach does a more accurate and therefore

reliable job of generating sizing data. This is

RESEARCH ARTICLE OPEN ACCESS




because sizing calculations consider the specific

operating nature of the system, not the features of

a simple, generic system. Further, the The

Benefits of System-Based Design 2 approach can

evaluate more operating conditions than can be

checked by hand, so that the approach is more

thorough and comprehensive. Finally, because

detailed, dynamic system simulations are part of

this approach, the method can potentially be used

to investigate the effect on sizing of such devices

and controls as:

• Outdoor air ventilation heat reclaims devices.

• Outdoor air economizers.

• Active dehumidification and humidification

controls.

• Night-time free cooling controls. Previously,

such controls have only been evaluated in energy

analysis simulations to determine effects on

operating costs. But each can also have an effect

on sizing which in turn can have a significant

effect the first cost of the system.

2. Literature Survey

Hani H. Sait, Int.Conference on

Sustainable Energy Information

Technology,2013, Journal Volume: 19, pages

636-645, Estimated Thermal Load and

Selecting of Suitable Air-Conditioning Systems

for a Three Story Educational Building.

1. Sandip Kumar Sahu “Cooling Load

Estimation for a Multi -story office building”

MSc. Thesis Department of Mechanical

Engineering-National Institute of Technology.

INDIA 2014.

2. Carrier Corporation. 2017. HAP Quick

Reference Guide, September 2017. Syracuse:

Carrier Corporation.

3. Goetzler et al. “Energy Savings Potential and

RD&D Opportunities for Commercial

Building HVAC Systems.” Prepared for U.S.

Department of Energy, Office of Energy

Efficiency and Renewable Energy, Building

Technologies Program. September 2011.

4. Goetzler et al. “Energy Savings Potential and

RD&D Opportunities for Non-Vapor

Compression HVAC Technologies.” Prepared

for U.S. Department of Energy, Office of

Energy Efficiency and Renewable Energy,

Building Technologies Office. March 2014.

5. ASHRAE STANDARD (Ventilation for

Acceptable Indoor Air Quality) june 3,2004,

Table 6.1

3. Objectives of the Research Work

1. Collecting the existing Dimensions, Material

& Electrical Equipments Data of NCET

Auditorium.

2. Load calculation is carried out using HAP

4.90 Software by considering (No. of peoples,

orientation & Area of Auditorium.

3. Duct to be used for Air Distribution is

designed using Duct sizer Software.

4. Drafting of Duct Layout & Dimensions Using

AutoCAD Software.

5. Final report of Air conditioning Space,

Plotted Layouts of Ducting.

4. Materials and Methodology

International Journal of Scientific Research and Engineering Development

ISSN : 2581-7175 ©

Fig.1.1: flow chart followed to complete work.

Figure 1.1 shows flow chart followed to carry out

the work, study is conducted which carried out by

different researchers which related to present

work. HAP 4.9 software is used as HVAC Load

Calculation analysis tool. The optimization

process is followed depends on Equipments heat

librated and loading conditions. At last clear

statements as to give on proposed work for

betterment and advancement for selected

applications.

4.1 Methodology Followed

-:AUDITORIUM DATA:-

1. Floor Area 3520sqft.

2. Peoples: 400

3. Electrical Equipments Data.Etc.

1. Heat Load Estimate: The manner in which

heat can flow can be any one or more for the

following ways:

• Solar radiation through transparent

surfaces such as window.

International Journal of Scientific Research and Engineering Development-– Volume 4 Issue

Available at

©IJSRED:All Rights are Reserved

Fig.1.1: flow chart followed to complete work.

Figure 1.1 shows flow chart followed to carry out

the work, study is conducted which carried out by

different researchers which related to present

4.9 software is used as HVAC Load

Calculation analysis tool. The optimization

process is followed depends on Equipments heat

librated and loading conditions. At last clear

statements as to give on proposed work for

betterment and advancement for selected

Electrical Equipments Data.Etc.

The manner in which

heat can flow can be any one or more for the

through transparent

• Heat conduction through exterior

wall/roof.

• Heat conduction through partitions,

ceilings, floors of adjacent non

conditioned spaces.

• Heat generated internally by occupants,

lights, appliances,

process.

• Load due to intake of outside air for

ventilation.

• Other miscellaneous gains.

2. Building Survey:

• Orientation of the Building.

• Application of the Space

• Physical dimensions of the space.

• Ceiling height, space above th

ceiling.

• Load Estimate.

3. Designing and Drafting of

Using Duct sizer Software

Drafting Tool.

5. Results and Discussions

Total cooling load to be required will be

calculated and is about 35.4 Tons.

The remaining Design HVAC Results of

Auditorium were attached Above

and chart.

Issue 3, May-June 2021


Page 575

Heat conduction through exterior

Heat conduction through partitions,

ceilings, floors of adjacent non-air to

Heat generated internally by occupants,

lights, appliances, equipment's and

Load due to intake of outside air for

Other miscellaneous gains.

Orientation of the Building.

Application of the Space (Auditorium).

Physical dimensions of the space.

Ceiling height, space above the false

Designing and Drafting of Duct layout

Duct sizer Software and AutoCAD

5. Results and Discussions

Total cooling load to be required will be

35.4 Tons.

emaining Design HVAC Results of NCET

Auditorium were attached Above with load sheet




Fig.1.3:Temp. vs Specific Humidity.

5.1 Duct Designing results

Table 1:- MAIN DUCTS DESIGNING

MAIN DUCT “IN” “MM”

1st Main Duct 20X27 500X700

2nd

Main Duct 18X26 450X675

3rd


4th


5th


Table 2 :- BRANCH DUCTS DESIGNING

BRANCH DUCT “IN” “MM”

1st Branch Duct 12X8 300X200

2nd

Branch Duct 12X8 300X200

3rd


4th


5th


6th


7th


8th


9th


10th


6. Conclusion

BD1 BD3 BD5 BD7 BD9

BD2 BD4 BD6 BD8 BD10

MD1 MD2 MD3 MD4 MD5



ISSN : 2581-7175 ©IJSRED:All Rights are Reserved 77

1. Maintains Perfect Human Comfort.

2. Determines required airflow rates for spaces

and system.

3. Central VAC system are considered to be the

most energy efficient method to air

conditioned because “Reduce air volume

saves both fan motor energy and energy

involved heating or cooling”.

4. HAP ENERGY ANALYSIS FEATURES

Uses detailed 8,760 hour-by-hour energy

simulation technique for energy analysis.

5. Less Energy Consumption by designing Air

Conditioning of NCET Auditorium using

ASHRAE Standard.

6. IOT for the system is easy to control and

accurate because of Centralized VAV System.

7. References 1. Refrigeration and air conditioning by

domkundwar, aurora.

2. Lehmann, B.M gwerder, V. dorer and F.

renggli (2011) thermally activated building

system.

3. ASHRAE handbook 2001

4. ISHRAE handbook 2007

5. www.mcquay.com

6. C.P Arora, Refrigeration and Air-

conditioning, 3rd Ed., Prentice Hall (2009).

7. Engineering design guidelines fluid flow

hydraulics sizing selection

http://kolmetz.com

8. Advantages of radiant cooling system by

Robert cubic june 2016

9. International Journal of Scientific &

Engineering Research, Volume 7, Issue 6 june

2016.

10. ASHRAE (American Society of Heating

Refrigeration & Air conditioning Engineer’s)

Fundamentals Hand Books 2017

11. Carrier Design Manual.

12. Trane Air Conditioning System Design

Manual.

13. Sheet Metal & Air Conditioning Contractors

National Association Standard.

hvac air conditioning designing for ncet auditorium

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