PCM Energy P. Ltd

 Customized PCMs    

 

General Products       A.C. Backup      Encapsulation Methods      Telecom Shelters      Doctor Says

T-series 18Cto29C: Phase Change Material, PCM Latest^TM 29T Brand with Melting Point 29°C and Latent Heat of fusion 175 KJoule/Kg or 260 KJoule/liter. Its 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: Phase Change Material, PCM Latest ^TM  36S Brand with Melting Point 36°C and Latent Heat of fusion 260 KJoule/Kg or 357 KJoule/liter. It is best suited for Air-Cooled Telecom Shelters. Other M.P. grades are summarized in the link.

Hot Pads and Solar Heating systems use our Phase Change Material, PCM Latest^TM 58, melting at 58°C. ( PCM )  Phase Change Materials ( PCM  ) Phase Change Materials

Thermal Choice: Phase Change Material, PCM as per buyer’s need of Melting, Freezing and Latent Heat.  ( PCM ) Phase Change Materials ( PCM )

Telecom Enclosure:  PCM or Phase Change Material widely used in Telecom Enclosures (BT Shelters) is Latest^TM29T for Air-condition Back-up AC and Latest^TM36S for Free Cooling. We also offer Polymer-based PCM-Filled Profiles Panels and Aluminum PCM-Filled Profiles or any other Container like Balls or Bottles or Heat Sinks and so on. 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  Telecom Shelters Info and for Air Conditioning visit our page A.C. Backup.

Freezer Salt:  Phase Change Material, PCM used for maintaining the temperature at 0°C, you get it free; use tap water. Ask us for other target temperatures.

W e 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 18^oC, 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 and demand a fortune for a sample. 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 T-series Latest™

T-series is the Latest in Phase Change Material-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. Go to our Book Mark for a write-up on Latest™ 29T. 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 Cooling 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

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

Latest ^TM29T

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 form. 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 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 PCM 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 PCMs are when space restrictions limit larger thermal storage units in direct gain or sunspace passive solar systems. Phase Change Materials 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 or in air-conditioning & refrigeration or cool-clothing.

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 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—when combined with the PCM—total 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                           :           28^oC

Melting Point                            :           29^oC

Latent Heat of Fusion               :           175 KJoule/Kg (40 K. Cal/Kg).  255 KJ/ltr (60000 KCal/Cu.m)

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

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

Shelf Life                                  :           Infinite

Max. Operating Temp.             :           100^oC

For a Live-Site Trial of Back-up Air-conditioning with Thermal Salt Latest™29T visit our Bookmark on LiveSiteTrial in Telecom Shelters 

 TECHNO-COMMERCIAL STATEMENT OF PCM PRODUCT S-series Latest™