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Commercial Ice-Makers

Commercial Ice-Makers. May 27, 2008 RTF Meeting Calculator Update. Ice-Makers Background. There are about 75,000 commercial ice-makers in the PNW Various types Cubes, Flakes, Crushed, Nuggets

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Commercial Ice-Makers

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  1. Commercial Ice-Makers May 27, 2008 RTF Meeting Calculator Update

  2. Ice-Makers Background • There are about 75,000 commercial ice-makers in the PNW • Various types • Cubes, Flakes, Crushed, Nuggets • Only the “cube” types have ARI ratings, so we will ignore flake, crushed, and nugget types – for now • Six “Varieties”: • Ice-Making Head Unit; air-cooled • Ice-Making Head Unit; water-cooled • Remote-Condensing Unit; air-cooled • Remote-Condensing Unit; water-cooled • Self-Contained Unit; air-cooled • Self-Contained Unit; water-cooled • Capacity is “lbs ice/day” at either • 70°F ambient, 50°F entering water; or • 90°F ambient, 70°F entering water (ARI)

  3. Why Update? • CEE Tier 1 has become popular in the region/country • Oregon and Washington have put in place minimum efficiency standards equivalent to CEE Tier 1 • Federal minimum standard expected to become effective in 2010 – CEE Tier 1 • Energy Star has adopted efficiency standards for air-cooled equipment • Equivalent to CEE Tier 2

  4. The New Specs

  5. Incremental Cost Analysis • MSRP was multiplied by 0.5 to get “Cost” • MSRP was about 2 X what most online stores were selling equipment for • Data primarily came directly from Manufacturer’s List Pricing • Some came from internet equipment sales companies (MSRP) • Did not find Cornelius pricing

  6. Note: • Hoshizaki has a 406 lb/day model that was omitted from this analysis

  7. Water Use • Potable Water Use (All Systems) • OR/WA/Fed don’t have a standard • CEE/Energy Star have maximum of 35 gal/100lb ice for self-contained units and 25 gal/100lb ice for all other units • Condenser Water Use (Water Cooled Systems Only) • OR/WA/Fed have a maximum water use standard • CEE doesn’t have a standard because they require systems to be on closed loops • Energy Star doesn’t have a standard for water cooled systems • Determined Average Potable Water Savings using ARI Data • (AvgWaterUseOR/WA Code – AvgWaterUseEnergyStar) • Results:

  8. Calculator’s Major Assumptions/Revisions • User Inputs Incremental Cost • Consistent with Previous RTF Calculator • However, incremental cost will be difficult for the user to determine • Measure Life = 10 years • Previous RTF Calculator: 20 years • PG&E Work paper: 12 years (comes from DEER estimate for food service equipment) • CEE/ADL: 7 to 10 years • 4400 hours per year (or 50% duty cycle) • Previous calculator and FEMP assumptions used 3000 hours per year • ADL 1996 study gives 50% duty cycle (4400 hrs) at 70°F ambient/50°F entering water • FSTC uses 75% duty cycle based on “ideal sizing” in their Food Service Equipment Workpaper for PG&E • Monitoring of 8 units (7 restaurants, 1 cafeteria) showed an average duty cycle of 56%, median 49%, stdev 20% • Source: Food Service Technology Center. “A Field Study to Characterize Water and Energy Use of Commercial Ice-Cube Machines and Quantify Saving Potential” December 2007 • Energy Savings Calculation: Since we do not have sales weighted data to establish baseline or upgrade efficiency, savings calculations use the user-entered capacity (lbs ice/day) to determine baseline and upgrade energy use: • Baseline: OR/WA/Fed minimum energy use (kWh/100 lbs of ice) at ARI conditions • Previous RTF Calculator used a curve fit of the “average” of the ARI database • Upgrade: Energy Star level (or CEE Tier 2) energy use (kWh/100 lbs of ice) at ARI conditions • Previous RTF Calculator used the installed case • Added water savings • Includes PV benefit of buying less water • Includes wastewater system energy savings

  9. Proposed RTF Ice-Maker Standards • All systems must be ARI certified • Air-Cooled systems must meet Energy Star Standards • Water-Cooled systems must meet CEE Tier 2 standards and condenser water must be supplied from a closed loop system or a system with a remote evaporative condenser.

  10. Decisions • Apply updates/changes to the calculator? • Adopt new Ice-Maker standards?

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