PCM Phase Change Materials Manufacturers for Air Condition AC

Air conditioning by Phase Change Material - PCM is a new way of taking comfort and not damaging the environment. Our PCM - Phase Change Material was used by Autarkis in Netherland and other european countries to cool offices. The melting point was set at 21oC by selecting a suitable PCM - Phase Change Material. The climate in Europe permits such melting point for equalising day and night temperature. The experience iof cooling with PCM - Phase Change Material is described as a very pleasant one. Unlike with the conventional Air conditions there is no irritation of air blowing.

An example of the method of calculating the PCM - Phase Change Material based air conditioning system is given below.

Weather Information on Bangalore

Month

Mean Temperature oC

Mean Total Rainfall (mm)

Mean Number of Rain Days

Remarks

Daily

Minimum

Maximum

Jan

15.1

2.7

0.2

22-23oC can be maintained all the time

Feb

16.6

29.6

7.2

0.5

22-23oC can be maintained all the time

Mar

19.2

32.4

4.4

0.4

22-23oC can be maintained for a few hours

Apr

21.5

33.6

46.3

PCM Cooling can be used if the acceptable

May

21.2

32.7

119.6

Melting Point of PCM is 23oC.

Jun

19.9

29.2

80.6

6.4

In that case Hall temp will be 25-26oC

Jul

19.5

27.5

110.2

8.3

22-23oC can be maintained for a few hours

Aug

19.4

27.4

137

22-23oC can be maintained for a few hours

Sep

19.3

194.8

9.3

22-23oC can be maintained for a few hours

Oct

19.1

27.7

180.4

22-23oC can be maintained for a few hours

Nov

17.2

26.6

64.5

22-23oC can be maintained all the time

Dec

15.6

25.9

22.1

1.7

22-23oC can be maintained all the time

The above details are the mean maximum and minimum temperatures in Bangalore.

The information is available from World Weather Information Service, India Meteorological Department.

From the above information, it appears that for more than 100days, PCM Melting at 20oC is workable

for free cooling. 4 months are marked in green back-ground and 5 months in yellow background.

In April, May and June, free-cooling can not be made available. PCM Melting at 20oC

will easily give comfortable temperature during day time for rest of the months.

Calculations based on 100 days free cooling will be on safer side.

Calculation of Quantity of PCM Required

Air Conditioning Load is stated to be 932 tons AC

932

Tons AC

1ton = 80Kcal*1000/24 so 932 tons AC is

(Refrig. AC is slightly lower)

3106667

Kcal/hr

i.e. No. of Kcal'hr*4.18KJoule/Kcal/3600sec/hr

3607

KJ/sec

At 10hours per day of Cooling or heating cycle it means

129858667

KJ/day

If PCM of 170KJ/Kg is used then we need No. of KJ/day/170 Kg of PCM

763875

Kg of PCM

At Rs.70/- per Kg the quantity of PCM will cost

(Bulk Price)

53471216

Rs.

Cost of Fixing on site @ Rs.60/- per Kg** including cost of False ceiling (1)

45832471

Rs.** Tentative

Total Cost

Rs.

99303686

Rs. Tentative

At Electricity cost of Rs.5/- per KWH Electricity Charges of AC usage (2)

18036

Per Hour

If the system is usable for 1000 hours a year, then cost of Energy Saved

18035926

Per Year

Saving on Maintenance & Depreciation of AC System at 50% of the above (3)

9017963

Per Year

Total saving/per year

27053889

Per Year

Pay Back Period if you count only cost of PCM (4)

1.98

Years

Pay Back Period if you count only cost of PCM and Cost of False Ceiling (4)

3.67

Years

III

Calculation of Surface Area of Encapsulated PCM.

Let us calculate for 76.3875MT PCM Encapsulated in a Panel or Profile of 20mm*200mm*1m

Heat Transfer Surface Area of all 4 sides will be 0.22*1*2 sq.m per piece

0.44

sq.m.

Each Profile will pack around 4kg of PCM

Number of Profiles required will be PCM/4

190969

Pieces

Heat Transfer Surface Area of 4 sides for all the pieces will be No. of Pieces*Area per piece

84026

Sq.m

i.e.

906643

Sq.ft

Surface Area of one side and all the pieces will be 0.2*1*2 sq.m

38194

Sq.m

i.e.

412110

Sq.ft

Let us say that 2 lacs sq.ft of the Hall is a square one with each side as 450 ft. (5)

The four sides will be approximately 450*4 (5)

1800

After excluding non-panel-able area

Say

1500

ft say

If the wall is paneled with PCM upto 10ft we will get on one side

15000

Sq.ft

If the Ceiling is Paneled with PCM profiles we will get

200000

Sq.ft

If the under floor is paneled with PCM-filled profiles we will get

200000

Sq.ft

It is advisable to have wall paneling and ceiling paneling.

Ceiling paneling can be adjusted to have double the number of panels by cross placing

Under floor paneling may not be desirable due to wear and tear.

Assuming one side ceiling paneling as 400000 sq.ft, we will get total heat transfer area of (5)

400000*2.2 sq.ft from Ceiling and 15000 sq.ft from walls (5)

895000

Sq.ft.

86284

Sq.m

Heat Transfer Coefficient of 25 Kcal/hr.sq.m.oC & ∆T of 2oC are safe bet.

Heat Transferable in 1 hour will be U*A*∆T

25Kcal/hr/sq.m/C*Area*T*1hr

4314180

Kcal/hr

The Variation in ∆T is adequately Taken Care of here as it will always be higher.

ADEQUATE....................

Replacement Air

Human Comfort level is achieved when around 100Whr per person per day is the dissipated by air.

Sp. Heat of Air is 0.25 Kcal/Kg and density is 1.25 Kg/Cu.m.

1 Watt.Hr = 3600 KJ = 861 Kcal

100 Watt.Hr = 360000 KJ = 86100 Kcal

There are 1800 people in the building

So total heat to be dissipated by air is 154980000 Kcal/day or ~ 1800 Kcal/sec

Flow rate of air required to dissipate this quantity of heat is 5740 m^3/sec per degree of temperature rise

For a 2 degree C temperature rise permissible for air, this becomes 2870 M^3/sec

For 2870 m^3/sec of air gushing through a 6000 sq.m. of Void (33% of Ceiling Area) in the ceiling panels

its speed will be .478 or ~ 0.5 m/sec. We can have higher by recirculation.

Turbulence in the Panels can be increased further by recirculation rate.

(1)To Check & Alter the Cost of Paneling and False Ceiling

(2) To Check & Alter the Cost of Electricity

(3) To Check and Correct the Cost of Depreciation & Maintenance of AC

(4) Intangible Benefits and Green Factor is added to this pay-back.

(5) False Ceiling would be needed either way for aesthetic purposes

(6) To Check and Alter the Side Area/Length/Breath

PCM Phase Change Material Manufacturers:

PCM Energy P. Ltd
Nesbit Road, Mumbai 400 010, INDIA
TEL: 91-22-23770100, 23774610, 23723564. FAX: 91-22-23728264.

Preliminary/Concept Presentation for Data Exchange and Technical Interaction.
Data Offered by the User:
Air Condition Load is 932 Tons of Refrigeration.	932	Tons AC
Carpet Area of the Hall is 200000 sq ft.	200000	Sq.ft
Comfort Level is 23oC. [Phase Change Material (PCM) to start Melting at 21oC	21	oC
No. of people is 1800	1800	Ppl
We get 19oC for at least 4hr/night for hundred nights in a year
Fan use is permitted

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	PCM Energy, is the pioneer manufacturer of Phase Change Materials and various Related Chemicals in India. It has several associated manufacturing facilities spread across the globe. No other vendor in the world knows the subject better than us. The participating units have one or more of the certifications like ISO-9001-2008, ISO-22000, Halal & Kosher Cettification. We also have "REACH" Preregistration.
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Air Condition AC PCM Phase Change Material Manufacturers

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