Chilled water tanks – uses and technical information

At Mibec we supply a wide range of water storage and Buffer tank products. Although usually associated with heating applications, this short article describes how buffer tanks can be used in chilled water storage and cooling applications and describes some of the important technical details to look for when selecting a tank.

Chilled Water (CHW) systems used to cool a buildings indoor air and electrical equipment are becoming increasingly common in commercial applications such as large data centres and server rooms. Buffer tanks form a key component in chilled water systems, often being used to provide additional volume in closed water systems. Adding this extra water capacity can reduce cycling of compressor units, which in turn improves temperature control giving a more consistent cooling system operation. Just like with heating systems, a buffer tank can also smooth out the loads and demands over the day from the business operations, this makes the cooling system more robust and reliable giving it greater longevity ultimately reducing maintenance requirements and saving money in the long run.

At Mibec we are able to offer a wide range of tanks suitable for chilled water applications from leading European manufacturers such as Cordivari. Our extensive range includes tanks such as the VT PDC and Volano R/C GB which are ideally suited for chilled water installations. Product features on these models include a limitation of on/off operations at the generator – which reduces strain on the system and ensures a more consistent water temperature. These tanks have a mild steel construction which makes them ideal for the glycol anti-freeze treatment commonly used in this application and come with a high thermal performance hard polyurethane foam outer coverings to minimise any heat gains from the external environment. Tank sizes range from 100 litres up to 2,000 litres covering a broad range of requirements and have operational limits down to -10oC. We also have tanks in the range which are designed to be installed in a horizontal orientation, these are perfect for projects where space is very tight or the tanks need to go in service voids between floors – as is typical in multi-story office and data centre projects. Horizontally orientated products such as the Cordivari GC 20 OR are available from us in sizes up to 5,000 litres and are easily distinguished by their high quality blue polyethylene outer cases.

If an off-the-shelf solution can’t be found to meet your project needs then we also offer bespoke designed but cost-effective tanks for cooling projects. All of these special Mibec tanks are custom-made to suit the exact customer requirements in terms of sizes and connections on only a 2-3 week lead time.

We offer a full free of charge specification service covering the whole of the UK, designed to support architects, specifiers or contractors. We can give you knowledgeable, yet impartial advice on selecting the right buffer tank to meet your chilled water needs. Please feel free to email or call our support department on 0330 053 880 (local call rate) where one of our trained advisers will be more than happy to help you.