H-Line Solution for Large District Heat Scheme

The H-Line is growing in stature in the UK and this project increased our application range for the product.

Typically, we have installed the H-Line alongside MDPE Expansion Tanks. However, in this instance, this is up to an 18 Megawatt system at full capacity with 3no. 4000 litre Expansion Tanks already in-situ. The expansion tanks are in full working order and did not require replacement (plus this would come with significant cost implication due to logistical challenge to even begin replacing them).

The existing unit had problematic controls that reared it’s head one too many times. The time had come to either replace the existing unit with the modern alternative (again this would come with significant cost implications), or make a change to a different setup.

This is a large District Heat Scheme in the North West and is incredibly critical for the buildings it feeds. As a result, we proposed a twin H-Line High-Flow setup to provide greater redundancy going forward. This setup provides full duplicity in a Duty/Standby arrangement to provide increased reliability for site. Furthermore, we have provided an emergency spare load cell as part of the project to be stored in the Energy Centre for future use.

A key element of this project was to ensure zero disruption due to the effect it would have on the overall network. Therefore, we installed a temporary pressurisation unit and spill tank, with a temporary interlock circuit; which we closely monitored throughout the course of works. This provided peace of mind but also meant all works could be completed in normal working hours, a significant cost saving in itself.

Along with the 2no. High Flow units we installed a new 300-litre buffer vessel and completed various pipework and electrical modifications to suit the new installation.

Our engineers Antony Chesters and Kieran Shields completed the bulk of the work, ably supported by Ben Brown and John Murphy on the main installation day.
The works were completed over 4-days in total and the end product is a really pleasing retrofit.

This certainly opens many more avenues for the H-Line with the capability to retrofit it to existing systems and utilise load cells where appropriate.