Deep chilled storage area (Propane chillers)

Seward Refrigeration were awarded the installation contract to supply, install and commission a 275kw glycol system for a deep chilled storage area operating at -5°C (New factory extension). Installed were two SABLight A260-1 packaged propane chillers manufactured by Sabroe, each chiller has a capacity of 150.8 kW supplying 40% Monopropylene glycol to 5 off ceiling mounted evaporators.

Sabroe SABLight chiller

Model	SABLight A260-1
Cooling capacity	150.8kw each
Full load shaft power	62kw
Primary Refrigerant	R290
Process medium	40% Monopropylene glycol
Medium inlet	-7°c
Medium outlet	-12°c

The chillers utilise a direct expansion R290 circuit, incorporating the latest high efficiency plate heat exchanger technology. The units each have a single variable speed, semi-hermetic screw compressor and come complete with air cooled condenser that is fitted with efficient variable speed EC fans. Furthermore, efficiency is assured with floating head pressure permitting a minimum pressure of 25°C.

The Sabroe SABLight units operate with a low refrigerant charge complete with:

VSD drive on compressor
VSD drive on all fans (condenser)
Gas detector kit built into unit, including standard ventilator

There are run & standby secondary glycol pumps (Cooling/ heating) all inverter driven for maximum efficiency feeding five ceiling mounted evaporators. Each cooler provides 55kw of cooling duty, supplying a room temperature of -5°C. Evaporator defrost is achieved by warm glycol coil and tray via a warm glycol ring main operating at +20°C. All evaporators are complete with EC fans, speed controllable, providing energy savings (minimum power consumption) and better efficiency over standard Axial fans

All plant is RDM controlled with 3G modem for monitoring purposes from our offices.

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“Seward Refrigeration have been efficient and proactive in meeting our companies requirements, they have designed and installed our refrigeration systems and have struck just the right balance between being a flexible and easy to deal with local firm...”

Chris Mullin Bakery Engineering Manager (Greggs Bakery Northwest)
“We have been using Seward Refrigeration for over 10 years. Throughout this time, we have found them to be responsive when required for breakdowns. They are also price competitive for new installations and maintenance.”

Paul Barton Site Engineering Manager
“I have been involved with Seward Refrigeration on a number of projects and installations over a period of several years. I have found that as a company they always conduct themselves in a professional manner. They have a flexible an open mind when discussing potential projects and always endeavour to provide a robust and cost effective solution to meet the customer’s requirements.”

Bernie Curtis Dimensions, Project & Management Services Ltd
“The deserts project was a moveable feast being designed and procured very much on a just-in-time basis. The refrigeration package was awarded to Seward following a competitive tender process. As always, budget was the primary concern and Seward were proactive in providing solutions that suited the constraints of the programme and site as well as the Client’s finances.”

Andrew Saunders Arctica ( Architecture & project management)
“We have been using Seward Refrigeration Ltd for over 4 years for service/maintenance and installation projects. They carry out a 1 day/week maintenance for all our refrigeration plant on site, consisting of large industrial Ammonia systems, independent HFC systems and glycol chillers.”

Peter Saint Engineering Manager