240 likes | 439 Vues
Grocery Store Measures. Door Gasket Laboratory Testing. Agenda. BPA Recommendations Gasket Damage, Door Open Times & Gasket Cost Data Emerson Lab Test Results Next Steps. I. BPA Recommendations. Door Gaskets – Deemed Measure Automatic Door Closer – Deemed Measure.
E N D
Grocery Store Measures Door Gasket Laboratory Testing
Agenda • BPA Recommendations • Gasket Damage, Door Open Times & Gasket Cost Data • Emerson Lab Test Results • Next Steps
I. BPA Recommendations • Door Gaskets – Deemed Measure • Automatic Door Closer – Deemed Measure
Comparison of Savings (kWh/year/door) • Notes: • Assumes gasket length of 15' for Reach-In and 20' for Walk-In • Emerson Lab Testing: BPA sponsored Emerson study • SCE: So. Calif. Edison Work Papers WPSCNRRN0013 (10/2007) and WPSCNRRN0001, Revision 1 (10/2007)
II. Gasket Damage Basis for Lab Testing (Ref. Phase 1 Report, 2/2007). • Reach-in Low Temp: Very high level of damage near the handle. Typical tear is 6-12 inches • Reach-in Medium Temp: Typically at bottom of door. Typical tear is 6-12 inches. Ten to twenty percent of damaged gaskets prevent door closure. • Walk-in Low & Medium Temp: Typical tears are: • Two to three feet in length • Completely missing several feet of gasket • Similar to Swiss cheese in appearance • Hard, brittle and blocking door closure • The standard used for repair in the PNW is a minimum 6” double tear. A man’s fist should generally fit comfortably through the tear.
Door Open Times Methodology: Total of (38) cases monitored at (10) sites: 14 walk-ins & 24 reach-ins Field Installed, Hobo U-9-001 State Loggers, in place 1 to 4 weeks
Laboratory Testing – Interim Results • Completed Gasket and Auto Closer testing and report: • Low temperature reach-in • Low temperature walk-in • Medium temperature walk-in • Completed testing on strip curtains – report under review.
Next Steps • Finalize report on strip curtains • Conduct UA-testing on walk-in • Evaluate results with wider audience including peer review. Prepare technical paper. • Incorporate revised results into ESG, as appropriate
Supporting Slides Door Gasket Laboratory Testing
Steady State Operation Anomalies(Full Gasket / Damaged Gasket) • Condenser Air Inlet • Full: 74.5 F. • Damaged: 72.5 F. • Saturated Suction Temperature • -36 F. • -32 F. • Compressor Operating EER • Full: 3.84 • Damaged: 4.24
Anomaly Impact on Test Summary Full Gasket test negatively impacted by 1.7 kWh per day
Normalized Energy Results Full Damaged 24 Hour Energy (kWh) 52.6 / 50.9* 54.3 / 54.3 Daily Increase (kWh) Baseline 1.68 / 3.4* % Daily Increase Baseline 3.2% / 6.7%* *Italics: original number Bold: Normalized number
Door Open Time Study • Total of (38) cases monitored at (10) sites • Mix of Walk-Ins and Reach-Ins • Field Installed • Hobo U-9-001 State Loggers • At least one week; up to four weeks