Notice: Undefined index: HTTP_REFERRER in E:\domains\i\insitecontrol.com\user\htdocs\count.php on line 49
Information published 29.04.05

environmental case study 1

Copyright © 2005
In-Site Control Ltd

After scenario:

To reduce demand for energy (steam) the programme was modified so that when the volume in the buffer tank fell (due to valve seat purges), the water make-up was from the available hot water supply line.

Because the CIP circuit was hydraulically balanced, the initial demand for energy (TCV at 100%) fell from 5¼ minutes to <3 minutes.

Additional demand for steam no longer occurred due to the buffer tank temperature being maintained by the addition of hot water. As a result of simple programme changes, demand for energy (steam) fell by over 50%.

More details

and related pages

Click on image to enlarge

Click on image to enlarge

Case Study No.1 This case study shows the significant reduction in demand for energy (steam) by changing 'top-up' water supply from cold water to the available hot water feed, reducing CO2 emissions.

Before scenario:

The initial demand for steam, with the TCV (temperature control valve - magenta analogue trend line) open at 100% was for 5 minutes 16 seconds.

During the course of the CIP there were 17 separate valve seat purges ('spikes' in the black trend line). After 3-4 valve seat purges the volume of solution in the CIP buffer tank falls below the mid-level probe. This causes more water (cold) to be added to the buffer tank resulting in the CIP solution temperature falling.

To bring the temperature back to >80oC, the TCV is opened, allowing more steam to be injected into the circuit.