PCM logo

ISO-9001-2008 Certificate

"REACH" Pre-registered
Halal Certified

Kosher Certified

PCM Energy, is the pioneer manufacturer of Phase Change Materials and various Chemicals in India.  It has several associated manufacturing facilities spread across Western India

For Translating this page in your language use this translation tool (Refresh if the tool is not seen).

Bookmark this Web Site

Email This Page Info to a Colleague or Yourself

Home/Products Product Details Applications Enquiry Contact Us

Phase Change Material General Products                    FAQ; Phase Change Materials PCM           

Phase Change Material PCM Encapsulation                Telecom Shelters Phase Change Material PCM

 

Air Condition - AC  PCM - Phase Change Material

 

PCM AC, Natural Air conditioning with Phase Change Material

Natural Air-conditioning with PCM

 

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.

 

Free Cooling for a Hall in Bangalore with Latest™21T

PROPOSAL FOR FREE AIR CONDITIONING OF HALL FOR 1000 HOURS/YEAR

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

 

 

 

 

 

 

 

 

I.

 

 

 

 

 

 

 

 

Weather Information on Bangalore

 

 

 

 

 

Month

Mean Temperature oC

Mean Total Rainfall (mm)

Mean Number of Rain Days

Remarks

Daily

Daily

 

 

 

 

Minimum

Maximum

 

 

 

 

Jan

15.1

27

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

3

 PCM Cooling can be used if the acceptable

 

 

 

May

21.2

32.7

119.6

7

 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

10

22-23oC can be maintained for a few hours

Sep

19.3

28

194.8

9.3

22-23oC can be maintained for a few hours

Oct

19.1

27.7

180.4

9

22-23oC can be maintained for a few hours

Nov

17.2

26.6

64.5

4

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.

 

 

 

II

 

 

 

 

 

 

 

 

 

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 for the Grade)

 

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

ft

 

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....................

 

IV

 

 

 

 

 

 

 

 

 

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

 

 

 

 

 

 
           
For a Live-Site Trial of Air-condition Back-up click Phase Change Material PCM for AC Back up in telecom Shelter  

For maintaining a Green House at 16oC click Green House Cooling by PCM - Phase Change Material

If you are a student of Phase Change Material, please visit FAQ on Phase Change Material - PCM

 

Phase Change Material Manufacturers

PCM Energy P. Ltd
 Nesbit Road,   Mumbai 400 010, INDIA
TEL: 91-22-23770100,  23774610,  23726950,  23723564. FAX: 91-22-23728264.

Cell Call to Anmol: +91-9821870100

Email: info@teappcm.com

Copyright and Usual Disclaimer is Applicable.
 Last updated: 09 June, 2011.

Home/Products Product Details Applications Enquiry Contact Us

 

BTS Rack PCM - Phase Change Material Filled

Neatly Packed PCM Profiles in BTS Telecom Shelter

 

PCM Phase Change Material Installed in Telecom Shelter for Ac-Back-up at 29C

For Encapsulation of PCMs visit  PCM - Phase Change Material Encapsulation