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PROCESS REFRIGERATION


air-cooled chiller for carbonation plant


Coolant Management Modules
Product Conditioning Tunnels
Process Chiller Plant




Refrigerated Systems

While small fridge plants respond readily to varying loads, it becomes desirable to reconcile capacity and demand more economically as heat flows increase. For example, the 85 kW air-cooled chiller in the photo serves an application cycling to several times its rating. By smoothing-out peaks and troughs between process load and chiller rating, push-pull flow across one of our coolant management modules (shown below) matches refrigeration capacity against prevailing conditions. It presents the chiller with a relatively constant load near to its design point, so that the machine runs at best available efficiency at a steady - but much smaller – loading.

TempMod 2

Tunnel Processing

Dove Thermal's long experience with conveyor-line drying and air quenching tunnels extends from fried food products manufacture and chocolate enrobing through to engine cylinder block casting and sintered component production. Tunnel sections may be used for raw materials preparation, intermediate stage conditioning and product finishing, and wherever a process is to be contained. A drying tunnel may be fitted either with local bridge-mounted solvent handling and recovery equipment, or ducted to remote systems.

PoP Assembly

Configuration

The isometric below shows a chilled-air cooling tunnel section with integral entry and exit air curtains to contain the cooled and dehumidified tunnel air mass. These suppress the humid transfer that would otherwise be caused by the vapour pressure gradient between conditioned and ambient air, maintaining a stable and controllable micro-climate in the tunnel section. The design shown also features a proprietary bridge-mounted condensing set, and continuous internal slot nozzles for edge-on air delivery. Assemblies may also be configured for vertical impingement of cooling air onto the conveyor band, or as both a drying and cooling tunnel for product conditioning. While supply temperatures might be less critical for an air quenching tunnel, they generally handle higher throughputs - which might entail provision of noise attenuation equipment.

Tunnel



Advanced Fabrication Technologies

We have developed unique self-jigging fabrication methods for the construction of HVACR assemblies, which have been successfully extended to the manufacture of sections for product conditioning tunnels and the construction of air quench tunnels. They exploit recent advances in CIM laser profiling and sheet metal forming to produce precision-built equipment with near off-the-shelf availability.


Examples of Process Refrigeration Projects:

Cryogenic Process Refrigeration for Kraft Foods
Coolant management modules for Axis Bottling
Fridge plant upgrade for North Quay Cold Stores
Ice-making equipment design for Sea Ice Limited
Ground Source HVACR plant for University of Wales
Transport refrigeration coils for Searle Refrigeration
Evaporator liquid distributors for the Design Council
Absorption chiller plant evaluation for Home Brewery


Dove Thermal Products

Shell-and-Tube Heat Exchangers and Steam-Heated Calorifiers
HTF Heaters, Batch Heating Vessels, Steam & HTF Calandria
Balance of Plant Modules & Packaged Plant Skid Mounts
Coolant Management Modules and Cooling Tunnels
Thermal Fluid and Hot Oil Heaters
Packaged Quench Plants
HTF-Heated Calandria
Air Handling Units

Dove Thermal Services

Consult-Design-Construct Services
Thermal Engineering Consultancy
Process Plant & Process Design
Environmental Systems Design
Product Development
Forensic Engineering
HVRAC Engineering
Thermal Design

Dove Thermal Engineering Limited, P.O.Box 5, Uttoxeter, ST14 8QX

Telephone: 01889 569933