1234 air quality

1. Contents
 Location Mapping
 Indoor Conditions
 Considerations
 Summary of Heat Load
 System Selection
 Ventilation
 Fire Norms
 Suggestions
 LEED Accreditation

2. Location Mapping
Khalapur
SOURCE: www.accuweather.com
DBT: 95°F
RH: 75%

3. Indoor Conditions
DBT: 75°F
RH: 50%
From ISHRAE Databook

4. Considerations (Glass)
From ISHRAE Databook

5. Considerations (Wall)
From ASHRAE Handbook
From ISHRAE Databook

6. Summary of Considerations
Inside
Condition
DBT: 75 RH: 50
Outside
Condition
DBT: 95 RH:75
Glass U factor 0.52
Wall U Factor 0.34
Partition (Wall) ΔT-5
Partition
(Glass)
ΔT
Lighting
Intensity
0.87 W/sq.ft.

7. Layout (Basement)

8. Layout (Ground Floor)

9. Layout (First Floor)

10. Layout (Second Floor)

11. Summary of Heat Load
CFM Tonnage
Basement 5164.38 18.83 TR
Ground Floor 6992.82 32.3 TR
First Floor 9505.5 40.42 TR
Second Floor 11924.02 32.64 TR
33586.72 124.2 TR

12. System Selection
VRF System Water Cooled
Chillers
Air Cooled
Chillers
Least efficient Most efficient Efficient but less
than water cooled
Less Noisy More Noisy Less Noisy
Less life span Highest life span Moderate life span
Continuous water
supply is not needed
Requires continuous
water supply
Continuous water
supply is not needed
Difficult to find
leakages
Leakages can be
easily found
Leakages can be
easily found
Less flexible More flexible Most flexible
Difficult to get higher
credit for LEED
Can get higher credit
for LEED
Can get higher credit
for LEED

13. Life Cycle Cost Analysis
Description Water Cooled Chiller Air Cooled Chiller
Power Consumption
per hour
58.322KW 134.7
Cooling tower fans 32 KW -
Daily energy
consumption (operating
hours 18)
1895.8 KWh 2424.6 KWh
Annual Energy Cost
(365 days per annum &
Rs.8/unit cost)
55.36 Rs.(in Lacs) 70.80 Rs.(in Lacs)

14. Description Water Cooled Chiller Air Cooled Chiller
Water consumption 1000 lph -
Cost of makeup water 13.14 Rs.(in Lacs) -
Maintenance cost of
cooling tower/year
1.6 Rs.(in Lacs) -
Condenser water
treatment costs /year
1.2 Rs.(in Lacs) -
Total operating cost per
year
71.30 Rs.(in Lacs) 70.80 Rs.(in Lacs)
Lifecycle cost for 15
years
1069.46 Rs.(in Lacs) 1061.97 Rs.(in Lacs)
Life Cycle Cost Analysis

15. Description Water Cooled Chiller Air Cooled Chiller
Capital cost of chiller 27.50 Rs.(in Lacs) 35 Rs.(in Lacs)
Cooling Tower 16 Rs.(in Lacs) -
Condenser water pump 16 Rs.(in Lacs) -
Condenser water piping 12 Rs.(in Lacs) -
Building cost 5 Rs.(in Lacs) -
Total cost 1217.26 Rs.(in Lacs) 1167.77 Rs.(in Lacs)
Additional cost 49.48 Rs.(in Lacs)
Air cooled chiller
Life Cycle Cost Analysis

16. Air Cooled Chiller
No need of
Cooling
Tower
Less installation
& maintenance
costs
Less space
required
Noise and
vibration
free
Source : TheEngineeringMindset.com

17. Air Cooled Screw Chiller
 Cools efficiently according
to building capacity
 Occupies less space
 More energy efficient
 Less noisy operation
 More reliable

18. Chiller specifications
Cooling Capacity : 142 TR
Base load : 26 TR
Evaporator entering temperature : 54oF
Evaporator leaving temperature : 44oF
Evaporator water flow rate : 341 US
gpm
Total power consumption : 160.7 kW
COP : 3.11
IPLV : 4.5
Refrigerant : R-134A

19. Use of VFDs
 Energy Efficiency
 Reduced Component Degradation
 System Reliability
 Less payback period
 Allow more precise control of airflow
Source: www.focusondrives.com Source : www.variablefrequencydrive.org
For Screw Compressors For Fans

20. Selection of Pump
Head:
Potential head+ Equipment pressure
drop+ Frictional pressure drop
=28.2 m
Selecting Mixed flow pump
Specification*
Capacity upto 30820 GPM
Head upto 30m
Working pressure 16bar
Motor Power:
Power =
=
=5.88KW

21. Selection of component
Specifications*
Tonnage:8.25TR,CFM:2943
3.7KW fan motor, MERV-13 Filters
Tonnage:10.08TR, CFM: 3532
5.5 KW fan motor, MERV-13 Filters
Tonnage:13.46TR, CFM: 4710
7.5KW fan motor, MERV-13 Filters
Tonnage:17.22TR, CFM: 5890
7.5KW fan motor, MERV-13 Filters
Air Handling Unit

22. Selection of component
Specifications*
Low Static Pressure
Tonnage:1.19TR, CFM:400
Power Input:56W
Low Static Pressure
Tonnage:1.67TR, CFM: 600
Power Input:94W
Low Static Pressure
Tonnage:0.9TR, CFM: 300
Power Input:94W
Fan Coil Unit

23. Fresh/Return Air Fan Selection
First-rate energy efficiency
Enhanced durability
Multiple sizes
High versatility
Ability to restrict overloading
Easy to maintain
Centrifugal Fan

24. Centrifugal Fan Specifications
Static Pressire Range=0-2988pa
Wheel Diameter=10-75mm
Air Flow=500-125000cfm
Break Horse Power=0.33-200kw
Backward inclined centrifugal fan

25. Kitchen Ventilation (Canopy Hoods)
Keeping The Air Clean
Removes Potentially Toxic Pollutants And Gasses
Removing Excess Heat
Cooking & Living In Comfort

26. Kitchen Ventilation(Grease Extractors)
• Use Internal Baffles To Remove Grease
• It draws exhaust air at 20 to 60 feet per minute
• Uses continuous cold water sprays to clean the hood internals
Per Linear Foot CFM 150 – 350
Static Pressure High ( 1.3 to 1.7” W.G)
Initial Cost High
Operational Cost Least
Grease Removal 90 – 95%

27. Toilet Ventilation

28. Energy Recovery System
Source: www.neptronic.com
 High effectiveness
 Available on all ventilation system
platforms
 Higher temperature range
 Reliable operation
 Low maintenance
 Low operating cost
Source : 2016 ASHRAE Handbook—HVAC
Systems and Equipment
Energy Wheel

29. Fire Norms & Considerations
Pressure
Velocity
Duct Linings & Coverings
Ductwork Through Smoke-stop Or Fire Lift Lobbies
Source- Fire Code 2018,clause 7.1,7.2 Air-conditioning And Mechanical Ventilation Systems

30. Needs in Case of Fire
Activate
exhaust fan
Thermal
detectors
in kitchen
Tripping of
AHU
Smoke
Detectors

31. Working equipments during fire
Fire detection alarm system
Exhaust ducts
Exhaust fans
Fire extinguishing system
Fire Sprinklers

32. Staircase Ventilation
Fan Specifications
 Air flow rate-65000m3/h
 Fan Diameter-1100mm
 Pressure-300pa
 Power-15kw