Facility Forum - Summer 2016 - (Page 43)

REFRIGERATION & ICE Energy Savings Inside Your Refrigeration System T By Dave Atthill, Facilities Services Coordinator, Municipality of South Huron his story begins with the South Huron Recreation Centre (SHRC), which is located north of London in the Town of Exeter. The SHRC was constructed in 1977 with an arena and attached hall to service the southern Huron County community needs. The arena was installed with a Freon refrigeration system. Increasing maintenance costs, the rising cost of hydrochlorofluorocarbon (HCFC) refrigerants and the need for capital investment of main components led management to recommend to the Council to replace the entire system. The phasing out of hydrochlorofluorocarbon (HCFC) to meet Canadian commitments in decreasing production and consumption of ozone depleting substances was a strong consideration in the decision-making process. Surprisingly, it took a number of years and Council meetings to proceed with plant replacement. In 2011, I.B. Storey provided a briefing document outlining refrigeration plant upgrade, integrated heat recovery and facility automation control costs. Included in the briefing document where energy saving estimates of $20,563. The plan also called for the construction of a new building to house a new ammonia refrigeration plant. The existing Freon refrigeration room shared the same space as the Ice resurfacing room. The plan called for a new ammonia system which made the original refrigeration room location unfeasible to meet the Canadian Standards Association-B52 Mechanical Refrigeration Code and the Technical Standards and Safety Authority Operating Engineer Regulations. Building of the new refrigeration room and installation took place in 2013. Brine Header Repair The brine header had a small leak in the 2014 ice season and showed signs of advanced corrosion. In 2015, a planned repair of 20 feet of brine header was put out to tender. This section of pipe was originally replaced around 25 years ago. A brine filter was installed in 2001. Prior to 2001, brine analysis reports were nil for sediment and no filtration adjustment was recommended. During the repair, the contractor found sludge at the end of the header. Also some of the brine supply lines were partially blocked in the first 20 feet of pipe. After consultation with the contractor, it was decided to check the rest of the header. Several partial obstructions in the supply/return lines were found in the remaining 85 feet of header pipe. Verification of Energy Savings The tender called for tracking and verification of energy savings. In the first two years of operation, the electricity energy savings fell well short of projected forecasts. Natural gas energy saving projections was reached. The verification of the energy consumption continued into the 2015 and 2016 ice with electrical and natural gas information being analysed. IB Storey staff used Mega Wattcher Energy Management Performance System to generate reports that were analysed and shared with MOSH management. I.B. Storey was kept informed of the brine pipe project and condition of pipes. The energy report from SeptemberOctober noted the following observation: "Existing issues with the brine header trench and piping were identified by South Huron in August in 2015, which FACILITY FORUM | 43

Table of Contents for the Digital Edition of Facility Forum - Summer 2016

Industry Watch
Arena Lighting – The Here and Now!
The Cemeterian
Understanding the Highway Traffic Act – Demerit Points
Effective Emergency Planning
Controlling Recreation Facility Energy Vampires
Risk Management
Poor Aquatic Maintenance
Pool Fouling
Member Profile
ORFA’s Top 10 Recreational Supervisory Failures
Health & Safety (PSHSA)
Shutting Down the Refrigeration Plant for the Summer Season
Energy Savings Inside Your Refrigeration System
Energy Champion
Index of Advertisers

Facility Forum - Summer 2016

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