Design and development of Phase Change Material (PCM) based Milking cum Cooling Pail

Student of National Dairy Research Institute, Bangalore, Ravi Prakash won the award for developing a prototype of Design and development of Phase Change Material (PCM) based Milking cum Cooling Pail. He carried his project work under guidance of Dr. Menon Rekha Ravindra and Dr. M. Manjunatha.

It is imperative to immediately cool milk from its drawing temperature (37 °C) to below the critical temperature (10 °C) in order to preserve the safety and quality of milk and its derived products. 

In developed and large-scale commercial dairy enterprise, this critical step in post-production processing of milk is achieved by integrating the milking machine with chilling unit accessorised with suitable piping and storage tanks. However, in a country like India where most of the dairy farmers belong to a class of millions of scattered small scale producers (0.5 – 10 L per head), such sophistications are neither pragmatic nor economical at the field level. This project aims at developing a system/device that could instantly cool small volumes of milk at the on-farm level preferably simultaneous to the milking to minimize the time gap between milk production and milk cooling below critical limit, even if the farmer has only one animal. 

Considering the gap between demand and supply of electricity in rural areas, the suitable nanofluid based phase change material with enhanced cooling energy storage capacity was primarily designed, evaluated and to be filled into the double jacketed space of an insulated milking cum cooling pail accessorised with a charger (a hermetically sealed well-matched refrigeration unit). The operation, handling and maintenance of the pail is farmer-friendly, sealed and resembles as daily used milking pail. This technology is envisaged to have very high socioeconomic utility; by helping millions of small scale milk producers/dairy farmers in developing countries like India in maintaining quality of milk and milk products, and contributing to the overall economy of the country.

The Hon’ble President of India, Shri Ram Nath Kovind awarded the Gandhian Young Technological Innovation (BIRAC – GYTI) Award to Ravi Prakash, National Dairy Research Institute, Bangalore at the GYTI 2018 Awards function held at Rashtrapati Bhawan on March 19, 2018.

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