Exactly Your Physics-Chemistry for Thermal Salts, Phase Change Material & Passive Cooling.

PCMs can be broadly classed as Organic and Inorganic.

Organic PCMs:
Organic Phase Change Materials (PCMs) can be Aliphatic or Other Organics. Users rarely specify the use of Organic PCMs. Latest^TM can offer Organic PCMs in low temperature range. Organic PCMs are expensive and they have average Latent Heat per unit volume and low density. Most items in organic PCM range are combustible in nature. They also have a wider range of Melting Point. Some customers specify organic PCMs and we offer them as per PCMs as per their requirement. You need specify the desired Melting Point only.

Inorganic PCMs:
Inorganic Phase Change Materials (PCMs) are generally Hydrated Salt based materials. Academicians are likely to misguide you into using pure hydrated salts like Sodium Sulphate Decahydrate and so on. Hydrated salts have a number of hydrates and an anhydrous form leading to stratification of material and loss of Latent Heat recovery with time. Hydrated salts also have a sub-cooling tendency. Old generation PCM manufacturers managed to add performance-enhancing agents. These additives do help in delaying the degradation of PCMs for say 100 cycles or thereabout. However, they do not address the basic reasons due to which sub-cooling and degradation happens. Earlier researchers emphasized that it is beneficial to use impure grades of base material as it promotes the nucleation and prevents sub-cooling. However, impurities also promoted nucleation of undesirable hydrates leading to stratification. Experts on crystallography have managed to identify the “Preferred Crystal Nucleation” method. It consists of a “Cold Finger” that nucleates and promotes the growth of desired crystals and “Detoxification” or “Selective Elimination” whereby any impurity that promotes the growth of undesirable crystals is removed. The current methods of Phase Change Material (PCM) manufacturing are like the new generation “Combination Drugs”.

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 Selected List of Hydrated Salt/Eutectic base Phase Change Materials (PCMs) sorted by Melting Point Temperature.

Melting Point oC	Grade of PCM	Useful Range	Latent Heat (L.H.) KJ/Kg	L.H. in Useful Range KJ/Kg	Specific Gravity	Remarks
-50oC	Freezer Salt	-60 to -40oC	325	395	1.3
-23oC	Freezer Salt	-30 to -15oC	330	380	1.2
-16oC	Freezer Salt	-25 to -05oC	330	380	1.02
00oC	Precision	-10 to -00oC	335	380	1
04oC	Preservation	00 to 10oC	105	135	1.4
07oC	Preservation	02 to12oC	300	330	1.4	Premium Grade. Know-How Offered.
10oC	Preservation	05 to 15oC	170	200	1.4
15oC	Preservation	10 to 20oC	175	210	1.4
18oC	Solar	15 to 21oC	175	210	1.5	Free Day-Night Cooling & Heating.  Cool Furniture, Cool Vests etc.
21oC	Solar	18 to 24oC	175	210	1.5
24oC	Solar	18 to 30oC	175	210	1.5
27oC	Solar	22 to 32oC	175	210	1.5
29oC	AC-Backup	22 to 36oC	>175	>210	1.5	To Give Back-up to AC & Comfort Telecom Shelter
32oC	AC-Backup	22 to 36oC	210	250	1.4
36oC	Electronic	30to 50oC	260	300	1.4	Electronic Comfort Telecom Shelter
40oC	Electronic	30 to 50oC	220	260	1.4
45oC	Heating	40 to 55oC	220	260	1.4	Solar Heater Hot Pads. Heat Sinks
48oC	Heating	40 to 58oC	220	260	1.4
58oC	Heating	40 to 58oC	220	260	1.4
68oC	Electronics	40 to 70oC	220	280	1.8	Electronic Sinks
70oC	Electronics	40 to 75oC	230	290	1.8
78oC	Electronics	40 to 80oC	240	300	1.8
We have Phase Change Materials (PCMs) & Heat-Treatment Salts upto 1100oC
The Yellow Marked Products are running items and extensively used world wide.

For a detailed write up on Phase Change Materials (PCMs) visit our page Products. It gives general information on all the products like T-series PCM 18-29^oC; S-series PCM 32-48^oC. Hot & Cold Packs, Freezer Salts, “Your Choice PCM”, and Encapsulation are also addressed.

For a write up on Phase Change Materials (PCMs) for general purpose visit our page General Products. It covers most items with a little more details.

For a write up on Phase Change Material (PCMs) Free Air Conditioning & Heating by Day-Night equalization at a target of 23-24^oC, green House at 16^oC and Cold Storage-Shipment visit our page A.C. Backup

For a write up on Phase Change Material (PCMs) for Air Conditioning Back-up & Free-Cooling by Day-Night equalization in Telecom Shelter along with a Live-Site Trial, Elimination of Diesel Generator visit our page Telecom Shelters

For Encapsulation of Phase Change Material (PCMs) visit our page PCM Encapsulation  

For Testing Methods, Conversion to BTU/ ^oF/lb etc. and Frequently Asked Questions on Phase Change Material (PCMs) visit our page Doctor Says

 

We can also offer Know-How & Turn-Key Projects for the above products. We can give you detailed report on each product for a fee of US $100000/-.