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Week 11 Data Collection: meters and instruments – commercial Elements of Breakdown • • • • • • • • • • Understand basis of datasets Understand how to enter data into a spreadsheet Understand time series data Understand role of data collection in an thorough energy audit in commercial and industrial buildings Review of use multi meters Understand HOBO temperature/humidity trends Review using light meters and flow meters Understand additional specialized measurement equipment Use a camera to record equipment condition or problems Data into Spreadsheets • Data can be entered manually to each cell in a spreadsheet. This is very time intensive and tedious. • Data can be downloaded and imported to an excel spreadsheet. This is the best way to populate the rows and columns in a spreadsheet. • Most energy management systems will create spreadsheets and even the graphics of the information for reports and presentations. • Once the data in in excel, it can be cut and pasted into every statistical package Time Series • Is not as exotic as it sounds • Simply a distribution of data over time • Seconds, minutes, hours, days, weeks, months, years • Bar charts, three dimensional graphics and many other figures can be produced over time Cameras • Essential tool for every energy auditor • Take pictures of hazardous conditions • Take pictures of broken or outdated inefficient equipment • Take pictures of operations and maintenance needs • Drop these pictures into reports and presentations • Size, describe and date all pictures Various Testing Instruments • Electrical Voltmeter Voltage Ammeter Current Ohmmeter Resistance Multi-meter V, I & R Wattmeter Active power Power factor meter Power factor/apparent power Light meter Lighting level Power quality analyzer Harmonic contents Thermographic scanner Conductors temperature More Testing Instruments • Temperature and Humidity Thermometer Sling psychrometer Infrared remote temp. sensing gun Digital thermometer with temp. probe Hair hygrometer Digital thermometer Dry bulb temp. Dry & wet bulb temp. Sense energy losses due to improper insulation Temp. inside air duct (thermocouple probe for high T) Humidity/wet bulb temp. Humidity/dry & wet bulb temp. More Testing Instruments • Pressure & Velocity Pitotstatic tube Air flow velocity & pressure manometer Digital anemometer with Air flow velocity & pressure probe Vane type anemometer Air velocity through a coil, air intake & exhaust, etc. Hood type anemometer Air flow rate of grille Pressure gauge Liquid Pressure Ultrasonic flow meter with pipe clamps Liquid flow & velocity Additional Testing Instruments • Miscellaneous Exhaust gas analyzer with probe T, O2, CO, CO2 and NOx Refrigerant gas leakage Detect refrigerant leakage tester Ultrasonic leak detector Detect compressed air leakage Steam leak detector Tachometer Detect steam leakage (usually for steam trap) Rotating speed
