Promethean Power’s milk-chiller technology uses an innovative thermal battery that saves cold energy instead of electricity. The machine has three components – the thermal energy storage battery, the compressor and a plate heat exchanger. The thermal battery is not a battery in the traditional sense, but a tank that contains two types of materials: a phase-changing material (PCM) that freezes and liquefies inside a series of tubes, submerged in a heat-transfer fluid (HTF) that never freezes. The battery is charged by the refrigeration compressor when grid power is available. The milk is poured either on a 3-foot high, stainless steel heat exchanger that instantly chills milk or in an active storage tank that gradually chills milk. In the battery’s charging process, using grid electricity, the HTF is cooled by the compressor to a temperature that allows the PCM inside the tubes to freeze, and therefore absorb huge amounts of thermal energy. The thermal energy later released from the melting PCM, as it changes from solid to liquid, is captured by the HTF and circulated around the custom heat exchanger. Cold energy is essentially stored in the battery and released to cool and preserve milk.
Legal Name
:
Promethean Power Systems Pvt. Ltd.
Headquarters
:
Boston, Massachusetts, United States of America
Founding Date
:
2007
No. of Employees
:
41 to 60
Core Team