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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

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Phase Change Material PCM Encapsulation                    FAQ; Phase Change Materials PCM           

A.C. Backup Phase Change Materials PCM                Telecom Shelters Phase Change Material PCM

Phase Change Material PCM - Green House, Electronics cooling...

T-series 18Cto29C: Phase Change Material, PCM LatestTM Brand with Melting Point 29°C and Latent Heat of fusion 170 K.Joule/Kg or 255 K.Joule/liter. It is best suited for Air-Condition Back-up to BT Shelter or Telecom Shelter. Other M.P. grades are summarized in the link.

S-series 32Cto45C: PCM Latest TM  Brand with Melting Point 36°C and Latent Heat of fusion 260 K.Joule/Kg or 357 K.Joule/liter. It is best suited for Air-Cooled Outdoor BTS and Electronic Cooling. Other grades are summarized in the link.

 

Hot Pads and Solar Heating systems use our PCM LatestTM58, melting at 58°C.

 

Telecom Enclosure: PCM or Phase Change Material widely used in Telecom Enclosures (BT Shelters) is LatestTM29T for Air-condition Back-up and LatestTM36S for Free Cooling. We also Offer Polymer-based PCM-Filled Profiles Panels and Aluminum PCM-Filled Profiles or any other Containers like Balls or Bottles or Heat Sinks or Jackets. We also supply Telecom Shelters and provide engineering services for Back-up Cooling in Existing and New Shelters. If your interest is only in PCMs for Telecom Shelter then go to   our page at PCMs for Telecom Shelters For Encapsulation Methods like Profiles Balls, Pouches, Bottles, Heat Sink, False Ceiling, Walls Paneling, Cool Furniture etc. Go to our Page Phase Change Material Encapsulation Methods .

Freezer Salt:  PCM used for maintaining the temperature at 0°C, you get it free; use tap water. Ask us for other target temperatures like4°C, 7°C, 10°C, 15°C, Minus 5°C, Minus 30°C and so on.

 

We cannot help making a negative comment on the products offered by other brands. Most of the brands are offering Thermal Salt 29 that freezes at less than 18oC, making them practically useless in tropical regions. The shelf life of some of the vendors is hardly 45-60 day, making its use by long distance importers almost impractical. Most of such vendors are not manufacturer of the major ingredients but only compounders. Often, they are one-man-show manufacturers and quote fancy prices for the product. With the information technology to their aid, they make fancy web sites and manage to squeeze the buyers. We have six manufacturing units, owned and managed by family members and most of the ingredients are manufactured by us.

TECHNO-COMMERCIAL STATEMENT OF PCM PRODUCT PHASE CHANGE MATERIAL T-series Latest™

PCM Energy P. Ltd.

PCM Latest™

PCM Latest™

PCM Latest™

 PCM Latest™

Product

Latest™29T

Latest™25T

Latest™20T

Latest™18T

Series

T-series Latest™

Description

Viscous Semi-Solid near Phase Change Temp.

Appearance

Translucent.

Base Material

Inorganic Salts

Phase Change Temp.

28-30oC

24-26oC

19-21oC

17-19oC

Sub Cooling @ 1000 cycle

2oC max.

2oC max.

2oC max.

2oC max.

Specific Gravity

1.48-1.50

1.48-1.50

1.48-1.50

1.48-1.50

Latent Heat Practically

175 Joules/g

175 Joules/g

175 Joules/g

175 Joules/g

Latent Heat Theoretical

188 Joules/g

188 Joules/g

188 Joules/g

188 Joules/g

Spec. Heat

2 Joules/g oC

2 Joules/g oC

2 Joules/g oC

2 Joules/g oC

Thermal Cond.

1Watt/m oC

1Watt/m oC

1Watt/m oC

1Watt/m oC

Congruent Melting

Yes

Yes

Yes

Yes

Flammability

No

No

No

No

Hazardous

No

No

No

No

Thermal Stability

> 10000 cycles

> 10000 cycles

> 10000 cycles

> 10000 cycles

Max. Operating Temp.

100oC

100oC

100oC

100oC

Rates

Available on request.

T-series is the Latest in PCM technology, Generation-X. It is not degradable with time. It can be used in thicker layers greater than 1” (> 25mm). This product has made the earlier PCMs obsolete. Latest™ 25T, Latest™ 20T, Latest™ 18T salts are similar to Latest™ 29T.

Table of Cycle No. V/s Latent Heat & Sub Cooling for PCM Latest™29T

Cycle No

100

200

300

400

500

1000

 

1000

1500

2000

1500

2000

2500

3000

Latent Heat KJ/Kg

196

188

188

192

185

178

 

178

175

170

172

175

178

170

Sub-Cool. oC

0.5

1.0

0.9

0.8

0.7

1.0

 

1.0

1.1

1.2

1.3

1.2

1.3

1.4

Error in measurement of Latent Heat can be <5% and Thermometer Sensor can be off by 0.5 oC

Latest TM 29T

Phase Change Materials (PCMs) or Thermal Salts are "latent" thermal storage materials. They use chemical bonds to store and release heat. The thermal energy transfer occurs when a material changes from a solid to a liquid or from a liquid to a solid. This is called a change in state or "phase." Initially, these solid-liquid Thermal Salts perform like conventional storage materials; their temperature rises as they absorb solar heat. Unlike conventional heat storage materials, when PCMs reach the temperature at which they change phase (their melting point), they absorb large amounts of heat without getting hotter. When the ambient temperature in the space around the PCM material drops, it solidifies, releasing its stored latent heat. PCMs absorb and emit heat while maintaining a nearly constant temperature. Within the human comfort and electronic-equipment tolerance range of 20°C to 35°C, latent thermal storage materials are very effective. The main applications for Thermal Salts are when space restrictions limit larger thermal storage units in direct gain or sunspace passive solar systems. PCMs may be used in Thermal Enclosures like Telecom Chambers BTS or BT Shelters or solar domestic hot water heating or passive solar space heating/cooling systems.

Glauber's salt, Soda Ash, Sodium acetate and paraffin wax are the most commonly used PCMs or Thermal Salts in solar heating systems. Although these compounds are fairly inexpensive, the packaging and processing necessary to get acceptable performance from them is complicated and costly. They are not offering a reliable pattern of releasing heat as the chemicals in these Thermal Salts separate and stratify when in their liquid state. These PCMs have not always re-solidified properly. When temperatures dropped, they did not completely solidify, reducing their capacity to store latent heat. These problems have been addressed by packaging phase change materials in thin or shallow containers, and by adding thickening and clumping agents. Many salt hydrate PCMs have the disadvantage that during extraction of stored heat the material super-cools before freezing. This reduces the utility of the materials and if too severe, it can completely prevent heat recovery. They lose their heat storage property after some cycles. These types of PCMs, however, compare unfavorably with the newer generation of low-cost, highly efficient PCMs. Researchers now label these older compounds as "limited utility" PCMs. Phase Change Materials perform best in containers that have a depth of one inch (25.4 millimeters). However, our T-Series Latest™ PCMs have defied this restriction. The packaging material should conduct heat well; and it should be durable enough to withstand frequent changes in the storage material's volume as phase changes occur. It should also restrict the passage of water through the walls, so the materials will not dry out. Packaging must also resist leakage and corrosion. Aluminum, steel and polyethylene are common packaging materials.


 

Thermal Salt Latest ™ 29T

Our Thermal Salt Latest™29T is a mixture of several ingredients. Most of these items are manufactured by us or by our sister concerns. Its properties are as under:

 

Specific Gravity                        :           1.5

Freezing Point                           :           28oC

Melting Point                            :           29oC

Latent Heat of Fusion               :           175 K.Joule/Kg (40 K. Cal/Kg).  255 K.J/ltr (60000 K.Cal/Cu.m)

*Most manufacturers report the heat of fusion in a temperature range, like 20oC to 35oC. The specific heat of PCM in this range will get added to the values. For this temperature range

*Latent Heat of Fusion             :           210 K.Joule/Kg (50 K. Cal/Kg).

Shelf Life                                  :           Infinite

Max. Operating Temp.             :           100oC

210 Kg of Latest29T PCM (10KWH) filled profiles were installed in an Existing Telecom Shelter of 2m Length by 2.5m width by 2.7m Height. Five thermometers were installed to measure temperature at various points. The Air-condition was switched off when the temperature was 17.3oC. Ambient temperature was also measured. The battery voltage was observed as per the instruction of the site-officer. The permissible maximum temperature that can be reached was targeted to 36oC. This temperature was not reached in 6 Hours of the run. In a blank reading without Latest29T PCM the target maximum temperature crossed in less than 1 hour.

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

For maintaining a Green House at 16oC click Green House Cooling

For Day-Night Temperature Balancing at 24oC (Free AC) click  Day & Night Temperature Balancing with PCM

 

Free Cooling for BT Shelters (Telecom Shelter)

Weather Information

Month

Ahmedabad

Bhopal

Hyderabad

Jaipur

Lucknow

Nagpur

New Delhi

 

Mean Temp.oC

Mean Temp.oC

Mean Temp.oC

Mean Temp.oC

Mean Temp.oC

Mean Temp.oC

Mean Temp.oC

 

Min

Max

Min

Max

Min

Max

Min

Max

Min

Max

Min

Max

Min

Max

Jan

11.7

28.4

10.2

25.3

14.7

28.6

7.8

22.5

6.9

22.6

12.4

28.6

7.3

21.1

Feb

13.8

31.3

12.4

28.6

17.0

31.8

10.7

25.7

9.3

26.0

15.0

32.1

10.1

24.2

Mar

18.8

36.0

17.1

33.6

20.3

35.2

15.8

31.5

14.2

32.2

19.0

36.3

15.4

30.0

Apr

23.4

39.9

21.8

38.3

24.1

37.6

21.4

37.0

20.5

38.1

23.9

40.2

21.5

36.2

May

26.2

41.8

25.5

40.7

26.0

38.8

25.4

40.3

24.7

40.5

27.9

42.6

25.9

39.6

June

27.0

38.4

25.3

37.0

23.9

34.4

27.2

39.3

27.1

38.7

26.3

37.8

28.3

39.3

July

25.7

33.3

23.1

30.6

22.5

30.5

25.5

33.9

26.1

33.6

24.1

31.5

26.6

35.1

Aug

24.8

31.9

22.4

28.8

22.0

29.6

24.3

32.0

25.6

32.5

23.6

30.4

25.9

33.3

Sept

24.1

33.4

21.4

30.5

21.7

30.1

22.9

33.2

24.3

33.0

22.9

31.8

24.4

33.9

Oct

20.9

35.8

18.4

32.0

20.0

30.4

18.6

33.4

19.0

32.5

19.8

32.6

19.5

32.9

Nov

16.5

33.2

14.1

29.0

16.4

28.8

13.1

29.0

11.8

28.9

14.9

30.4

12.8

28.3

Dec

13.0

29.8

10.9

25.9

14.1

27.8

9.1

24.4

7.4

24.1

12.1

28.2

8.2

23.0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Presentation for Providing Free Cooling in BT Shelters in the “Hinter Land”

The above details are the mean maximum and minimum temperatures in various cities in the “Hinter Land”. The selected cities do not include any of the costal towns as the costal towns have a different temperature pattern. The above information is available from World Weather Information Service, India Meteorological Department.

A close scrutiny shows that the mean monthly maximum temperature in India, in the hinterland can be 43oC and a peak time maximum temperature in India, in the hinterland can be 45oC with an occasional shoot-up. The corresponding minimum temperature can be 27oC on that day. A PCM of 36oC is ideally suited for such a climate and for a BT Shelter that is targeting a maximum temperature of 40oC inside the shelter.

The worst day in the year may have a temperature profile in a day as under:

40 to 45 oC+

                        for   4hours

36 to 40 oC

                        for   8 hours

27 to 36 oC

                        for 12 hours

The temperature pattern in the BT Shelter can be as under:

No. of Hours in a day

Ambient Temp.oC

ShelterTemp. w/o cooling

Shelter Temp. with LatestTM 36 PCM

Energy Load in KWH

  4

40-45+ 

50-55 oC

38-40 oC

5KWH   Discharging

  8

36-40

46-50 oC

36-38 oC

5KWH   Discharging

12

27-36

37-46 oC

27-36 oC

Charging PCM.

The PCM of Melting Point 36 oC is well suited for the job. Depending on the size of BTS and ambient conditions, the Energy load will vary.

This presentation is made for starting an interaction with user. The user may evaluate, amend and interact with us. Go to our write-up on S-series32Cto45C PCMs.

 

TECHNO-COMMERCIAL STATEMENT OF PCM PRODUCT PHASE CHANGE MATERIAL S-series Latest™

PCM Energy P. Ltd.

PCM Latest™

PCM Latest™

PCM Latest™

 PCM Latest™

Product

Latest™32S

Latest™34S

Latest™36S

Latest™45S

Series

S-series Latest™

Description

Viscous Semi-Solid near Phase Change Temp.

Appearance

Cream or Gray

Base Material

Inorganic Salts

Phase Change Temp.

31-32oC

33-34oC

34-36oC

44-46oC

Sub Cooling @ 1000 cycles

Small

Small

Small

Small

Specific Gravity

1.4 5

1.4 5

1.4 5

1.4 5

Latent Heat Theoretical

230 Joules/g

250 Joules/g

260 Joules/g

260 Joules/g

Latent Heat Practical

>200 Joules/g

>220 Joules/g

>230 Joules/g

>230 Joules/g

Spec. Heat

2 Joules/g oC

2 Joules/g oC

2 Joules/g oC

2 Joules/g oC

Thermal Cond.

0.6Watt/m oC

0.6Watt/m oC

0.6Watt/m oC

0.6Watt/m oC

Congruent Melting

Yes

Yes

Yes

Yes

Flammability

No

No

No

No

Hazardous

No

No

No

No

Thermal Stability

> 10000 cycles

> 10000 cycles

> 10000 cycles

> 10000 cycles

Max. Operating Temp.

100oC

100oC

100oC

100oC

Rates

Available on request.

LatestTM 32S, Latest™ 34S, Latest™ 45S salts are similar to Latest™ 36S.

LatestTM36S

Phase Change Materials (PCMs) are "latent" thermal storage materials. They use chemical bonds to store and release heat. The thermal energy transfer occurs when a material changes from a solid to a liquid or from a liquid to a solid. This is called a change in state or "phase." Initially, these solid-liquid PCMs perform like conventional storage materials; their temperature rises as they absorb solar heat. Unlike conventional heat storage materials, when PCMs reach the temperature at which they change phase (their melting point), they absorb large amounts of heat without getting hotter. When the ambient temperature in the space around the PCM material drops, the material solidifies, releasing its stored latent heat. PCMs absorb and emit heat while maintaining a nearly constant temperature. Within the equipment comfort range of 25°C to 45°C, latent thermal storage materials are very effective. The main applications for PCMs are when space restrictions limit larger thermal storage units in direct gain or sunspace passive solar systems. PCMs may be used in Thermal Enclosures like Telecom Chambers or solar domestic hot water heating or passive solar space heating/cooling systems.

Glauber's salt, Soda ash, Sodium Acetate and paraffin wax are the most commonly used PCMs in solar heating systems. Although these compounds are fairly inexpensive, the packaging and processing necessary to get acceptable performance from them is complicated and costly. They are not offering a reliable pattern of releasing heat as the chemicals in these PCMs separate and stratify when in their liquid state. These PCMs have not always re-solidified properly. When temperatures dropped, they did not completely solidify, reducing their capacity to store latent heat. These problems have been addressed by packaging phase change materials in thin or shallow containers, and by adding thickening and clumping agents. Many salt hydrate PCMs have the disadvantage that during extraction of stored heat the material super-cools before freezing. This reduces the utility of the materials and if too severe, it can completely prevent heat recovery. They lose their heat storage property after some cycles. These types of PCMs, however, compare unfavorably with the newer generation of low-cost, highly efficient Phase Change Materials. Researchers now label these older compounds as "limited utility" PCMs.

Phase Change Materials perform best in containers that have a depth of  one inch (25.4 millimeters). The packaging material should conduct heat well; and it should be durable enough to withstand frequent changes in the storage material's volume as phase changes occur. It should also restrict the passage of water through the walls, so the materials will not dry out. Packaging must also resist leakage and corrosion. Aluminum, steel and polyethylene are common packaging materials.


Thermal Salt Latest™36S.

Our Thermal Salt Latest™36S is a mixture of several ingredients. Most of these items are manufactured by us or by our sister concerns. Its properties are as under:

 

Specific Gravity                        :           1.4

Melting Point                            :           36oC. There can be some freezing/melting in 3oC around it.

Latent Heat of Fusion               :           250 K.Joule/Kg (60 K. Cal/Kg).

                                                             340 K.Joule/liter (81000 K.Cal/Cu.m)

*Most manufacturers report the heat of fusion in a temperature range, like 20oC to 40oC. The specific heat of PCM in this range will get added to the values. For this temperature range

*Latent Heat of Fusion             :           300 K.Joule/Kg (72 K. Cal/Kg).

Thermal Expansion                  :         The coefficient of thermal expansion is the least offered in the industry. This eliminates cracking or shattering of containers and tubes.

 

 HDPE Panels Filled with Phase Change Material       Balls

                                    PCM filled Panels.                          PCM filled Pipes          PCM filled SS Ball

Aluminum Bottles HDPE Ball  PCM Battery Jacket

                              Aluminum Bottles       HDPE Balls                 SS Balls in diff. sizes      Jacket

 

Hermetically Sealed Profile of Any Size Like 16mm*160mm*1000mm OR 20mm*200mm*850mm or …..etc,  offered in Polymer or Aluminum filled with desired Grade of PCM i.e. Phase Change Material. We can give PCMs in Aluminum or Pet Bottles, HDPE or SS Balls or in Aluminum Sinks or in any container as per your choice.

 

 

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.

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