THERMAX VAPOUR ABSORPTION MACHINE GIVES -2°C COOLING IN THE COCA-COLA PLANT AND SAVES ELECTRICITY BY 90%

Introduction

This was indeed an exciting collaboration with Coca-Cola, the world leading beverage company.Thermax designed a steam fired 200 TR vapour absorption machine (VAM) for them. The absorption chiller was to give -2°C chilled brine while using CFC free refrigerant in order to meet the bottle cooling requirement in the Coca-Cola plant at Pirangut near Pune located in Western India. This VAM uses steam energy input of 8 bar pressure. It replaced an old compression chiller where it saved 1240 MW-hr of electricity per annum.

The process of bottle cooling is an important step in beverage manufacturing. Solubility of CO2 in water decreases as temperature increases. So before filling the bottles it is necessary to cool the bottles to contain the CO2 inside the solution.

Getting -2°C from the existing electrical chiller was having larger running cost. A specially designed 200 TR double effect steam fired VAM was supplied by Thermax to meet this requirement.

Our VAM runs on the readily available steam from boiler, thus saving the electrical output 235 kW per hour. This in turn saves the operational cost by significant amount as power cost in that area was high and steam cost was low.

Thermax installs a fully automated water treatment plant in Bangladesh

Thermax has commissioned a water treatment plant with a capacity of three million litre per day (150 m3 / hour). The fully automatic plant is for a global beverage company’s manufacturing facility at Mymensingh, Bangladesh, about 90 km from Dhaka. 

This comprehensive project treats the inlet water (drawn from the ground) through a combination of systems for aeration, filtration and ultrafiltration. These help in the removal of TDS (total dissolved solids) and iron from the water. The system also comprises dealkaliser, softening and double stage reverse osmosis (RO) plants and a backwash recovery system.

In water treatment systems,the backwash process that cleans up the filters at specific intervals, essential for optimum performance, consumes large quantities of water. The WWS team has designed a backwash recovery process to recycle 87% of the water. The wastewater reject from the RO plants also is recycled. As a result of such integrated design and automation (operated through SCADA offered with PLC) the plant, compared to conventional ones, operates at an overall 5% higher efficiency. 

Through an appreciation letter, the customer expressed his satisfaction with the performance of the Thermax plant. It is now a reference project for peer companies in Bangladesh. Thermax has also supplied two Shellmax boilers with BOP to the same customer.

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