Laminar Flow Restrictors for Hospitals and Health Care
- Slides: 17
Laminar Flow Restrictors for Hospitals and Health Care Facilities JESSE MARTINEZ, PE, CEM & JULIANNA COLWELL, CEM SEPTEMBER, 2015
Presentation Overview 2 Objective: Seeking TF approval of LFR workpaper �Measure Description �Workpaper Methodology �Results �Issues and Concerns �Questions or Comments Title 9/26/2020
Measure Description 3 Base Case Basic Faucet � No flow restriction device � 2. 5 average gpm Title Measure Case Laminar Flow Restrictor � Reduction of flow using laminar flow principles � OSHPD compliant � Not an aerator 9/26/2020
Measure Description 4 Aerators Laminars � Banned in Health Care �OSHPD approved Facilities � Reduce flow by adding turbulence = air � Air allows for bacteria/bio film Title �Laminar changes flow pattern to produce laminar flow with a reduced flow rate 9/26/2020
Measure Description 5 � Units: per Faucet � Measure Application and Delivery Type q Prescriptive Rebate � � q Tamper/vandal proof product required Zeolite coating optional Retrofit/Add on (REA) � Eligibility q q Climate Zones: All Building Types: Commercial � DEER Subsectors: Clinics, Hospitals, Nursing Homes � Target Market q Health Care Facilities � � Title Hospitals, Inpatient, Outpatient, Nursing Homes Any facility that is subject to OSHPD regulations 9/26/2020
Measure Description 6 � Market Potential q q 15, 000 SCG customers considered part of the health care industry Used NAICS codes, LA County assessor data, and published bed counts to estimate potential � q Title Bed counts made the assumption of 1 sink with faucet per every 2 beds reported The data does not cover other operations of some health care facilities such as surgery, food service, and public restrooms Type NAICS Count Est. # of Sinks Rounded Outpatient Buildings 12, 000 187, 897 200, 000 Nursing Care Facilities 2, 000 66, 501 70, 000 Hospitals 800 97, 200 100, 000 Total 14, 800 370, 000 9/26/2020
Measure Description 7 � Measure Costs q q Baseline cost (material + labor): $0 Measure cost: � � q Equipment Cost: $7. 27/ea Developed using entire set of vandal proof LFR Neoperl 2014 Wholesale Price List. Labor Installation Cost: $7/ea Current contractor cost per Aerator installed in SCG 3 rd party residential program. Incremental cost: $14. 27 � EUL q 10 year (DEER EUL ID: _Wtr. Ht-WH-Aertr_) � Tamper proof option � NTG q 0. 7 (DEER EUL ID: _All-Default<=2 yrs_) � Savings Potential q q Title 470, 000 therms/yr for SCG as a conservative estimate Similar possibilities across the state 9/26/2020
Workpaper Methodology: Baseline 8 � Title 9/26/2020
Workpaper Methodology: Measure 9 �Measure Control Volume q Title No need to deal with hot water delivery or production system 9/26/2020
Workpaper Methodology: Measure 10 � Title 9/26/2020
Workpaper Methodology: Measure 11 � Title 9/26/2020
Workpaper Methodology: Measure 12 � Title 9/26/2020
Workpaper Methodology: Measure 13 � Title 9/26/2020
Results 14 Title Measure ID LFR Flow Rate (gpm) Savings per unit (therm/yr) Shw. Flr 004 2. 2 40. 90 Shw. Flr 003 1. 5 59. 49 Shw. Flr 002 1 72. 77 Shw. Flr 001 . 5 86. 04 9/26/2020
TRC Values 15 Measure ID Gas Saved (therms) Rebate Paid TRC Shw. Flr 004 40. 90 $14. 27 13. 90 Shw. Flr 003 59. 49 $14. 27 20. 22 Shw. Flr 002 72. 77 $14. 27 24. 73 Shw. Flr 001 86. 04 $14. 27 29. 24 Title 9/26/2020
Issues and Concerns 16 Abstract Review Comments from the Cal TF ü Workpaper to consider whether reduced flow leads to reduced energy usage, or whether people just use faucets longer, to compensate for reduced flow q q Title Cal. TF researched in medical journals and no studies were found. Based of SCG Custom data, . 5 gpm is the threshold for degradation of customer experience. 9/26/2020
Questions or Comments? 17 Title 9/26/2020
- Laminar vs turbulent
- West calcasieu cameron 3767 baton rouge la 70821
- Reynolds number units
- Difference between laminar and turbulent flow
- Friction factor laminar flow
- Properties of laminar flow
- Is blood flow turbulent or laminar
- Advantage of laminar flow
- Nusselt number laminar flow in tube
- Stanton number formula
- Darcy weisbach equation
- A double pipe heat exchanger
- Friction factor for laminar flow
- Use of aseptic hood
- Friction factor for laminar flow
- Low and medium risk sterile compounding quiz
- Laminar flow definition
- Laminar flow hoods