Heat Recovery System

Heat Recovery on a CO2 installation. A snapshot of one of our latest projects.

Case Study

At the top of everyone’s list when looking at investing in new refrigeration equipment is energy efficient and environmentally friendly – ‘green energy’. This snapshot of one of our latest projects ticks both those boxes and a whole lot more.

On this site, we have installed co2 refrigeration equipment at both medium and low temperatures. When designed and installed properly, co2 is a very efficient refrigerant, not to mention being environmentally friendly with a GWP of 1. To increase energy efficiencies on this project we have also introduced a heat recovery system. This system essentially takes the waste product from the refrigeration cycle (the heat) and re-uses it throughout the rest of the building.

The basic process is as follows: The co2 discharge gas rejects heat into a glycol system via 2 high-pressure plate heat exchangers. The glycol is heated to 50 C and is stored in a stainless-steel insulated vessel. The warm glycol is used to supply the under-floor heating circuit, which is below the freezer floor, this keeps the area at 8 C and prevents frost heave. We also use glycol to defrost the evaporators in the freezer and the chilled area. On this site there is a banana room, so the glycol is used to keep this room at 12 C. The heat recovery also supplies warm water to the wash hand basins in the changing rooms and toilets.

By using the rejected heat to heat the glycol, we can save electricity without the necessity of an electric heater mat. Also, the evaporators do not require electric defrost elements as we pump the glycol through the evaporators to defrost them. So, in essence, we are using the waste product of the heat recovery process to make significant savings in electricity costs.

Not only do we design, supply, and install this CO2 and heat recovery system, but we can also provide a maintenance team which can support you to maintain the equipment’s efficiency and performance throughout its lifespan.

Are you looking for a more energy-efficient cold storage solution or do you have a project you would like us to discuss with one of our experts? Please don’t hesitate to get in touch.


What we do

DD Cooling is a Preston-based, specialist refrigeration and air conditioning installation and maintenance company. We support businesses in The North West and across the UK.

DD Cooling specialist refrigeration and air conditioning installation
Testimonials Roger Coulston, Ribble Farm Fare

We buy fresh fruit and vegetables from farmers to supply the wholesale market and offer services to restaurants and schools by preparing the vegetables ahead of delivery. Therefore, efficient refrigeration is integral to our business model, and DD Cooling supports us with everything we need. They help us to save running costs year on year and provide an efficient service that we can rely on.

Roger Coulston, Ribble Farm Fare
Testimonials Austin Anderton, Brendan Anderton Butchers

Our business supplies the catering industry and we operate a central factory which distributes to customers directly, as well as two of our own retail shops in Longridge and Clitheroe. We pride ourselves on the quality of the meat we provide for customers and the service from DD Cooling is an integral part of our business offering. They have also allowed us to generate maximum efficiency and cost savings with the cooling of our produce and have provided design, building and maintenance of bespoke cold stores right the way through to improving and maintaining dated refrigeration equipment.

Austin Anderton, Brendan Anderton Butchers
Testimonials Trudy Webster, Dawn Dew Salads

We are a specialist salad crest grower and supply a range of grocers and supermarket operators. DD Cooling is 20 miles away but their personal service outweighs those we’ve experienced with other, closer suppliers. We know we get honest advice and have grown to know the teams which we love! DD Cooling has built specialist growing rooms for our delicate produce and maintains our on-site refrigeration.

Trudy Webster, Dawn Dew Salads
Testimonials The Flower Bowl

Here at the flower bowl, we have a state of the art co2 refrigeration system. This system is integral to our business, when there’s a fault with it many of the services we provide are unable to continue. Since the system was installed it has had various technical issues. After lots of back and forth, we decided to go out and see if another company would be able to help us diagnose and rectify these issues. Along came DD Cooling who came highly recommended. Over time they have been able to get the system operating fully and make it reliable, this hasn’t been an easy task. It has been time-consuming and I’m sure head-scratching at times. Now the system has been made reliable they continue to service and maintain the equipment to an excellent standard.

The Flower Bowl
Ribble Farm Fare logo
Brakes - a sysco company logo
Bolton Council logo
Roxy Leisure Ltd logo
Whin Yeats Dairy logo
Swissport logo
Oakhill Veterinary Centre logo
Concept Taverns logo
Franke logo
Yew Tree Dairy logo
Little Town Dairy logo
Lancashire Logistics logo
Andertons Ribble Valley Butchers logo
Flower Vision Lancashire logo
Geldard Farm Eggs logo
Love Story Bridal logo
Expleo logo
Krempel logo
Ann Foreshaw's Dairy logo
The Flower Bowl logo
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What we’ve achieved

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