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Phase change material (PCM) is a substance with a high heat of fusion which, melting and solidifying at a certain temperature, is capable of storing and releasing large amounts of energy. Heat is absorbed or released when the material changes from solid to liquid and vice versa; thus, PCMs are classified as latent heat storage (LHS) units.
Latent heat storage can be achieved through liquid→solid, solid→liquid, solid→gas and liquid→gas phase changes. However, only solid→liquid and liquid→solid phase changes are practical for PCMs. Although liquid–gas transitions have a higher heat of transformation than solid–liquid transitions, liquid→gas phase changes are impractical for thermal storage because large volumes or high pressures are required to store the materials in their gas phase. Solid–solid phase changes are typically very slow and have a relatively low heat of transformation.
Organic PCMs
Bio-Based, or Paraffin (CnH2n+2), or carbohydrate and lipid derived.
· Advantages
o Freeze without much undercooling
o Ability to melt congruently
o Self nucleating properties
o Compatibility with conventional material of construction
· Disadvantages
o Low thermal conductivity in their solid state. High heat transfer rates are required during the freezing cycle. Nano composites were found to yield an effective thermal conductivity increase up to 216%.
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Manufacture Specification:
Our services:
1) Low MOQ: It can meet your promotional business very well.
2) OEM Accepted : Welcome custom designs, artworks and idea. We have professional designer teams who will work closely with you to develop your own designs into products.
3) Good Quality :We have strict quality control system .Good reputation in the market.
4) Fast & Cheap Delivery: We have big discount from forwarder (Long Contract). We could arrange sea freight, air freight, express, door to door and insurance services as well.
5) For each order we will inspect every piece 3 times before final packing. In the meantime we are also glad to cooperate with custom appointed third parties to perform inspection in our factory.
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FAQ:
1. What is the Warranty for our product?
For all product,we have common warranty, based on standard warehouse situation specified by us .If any quality problems on our side occurred in this period ,we will take on the shipping cost and replacement.
2. Does your product harmful to body?
No. It can reach food grade level. All of our product have passed CE, SGS, MSDS, FDA.
3. Is there cheap shipping cost to import to our country?
For small order ,express will be best .And for bulk order ,sea shipping way is best but take much time.
For urgent order ,we suggest via air to airport plus our shipping partners send to your door.
