CEE 243 Final Presentation Adam Pharr Meng Yu May 31st, 2011 1Outline • Hot Water Loop system overview • Hot Water Supply Temperature (2009 problem) • Differential pressure (2009 problem) • Hot Water Loop for Representative Office 341 • Steam system overview • Steam –Steam – Flowrate, design underestimation (2009 problem) • Steam – Carpet plot • PV – Carpet plot, sensor • Wiki • General comments and recommendations 2Hot Water Loop system overview • Function intent: • Typical sensor points: Return Temp, Supply Temp, Flow Rate, Diff Pressure 31. Hot Water Supply Temperature • Provide Heating for Y2E2 • Affected by steam supply and heat exchanger • According to 2009 data manual, the hot water supply temperature should be around 180F • Inconsistency is recorded from previous class Schematic on sensor locations for Main hot water loop 41. Hot Water Supply Temperature • 2009 whole year data • Never goes beyond 165F • Strong correlation with OAT • According to data manual, all recorded data should be assigned red light • Performance error? • Operational intention? 2009 whole year Time Series Plot for Outside Air Temperature and Hot Water Supply Temperature 51. Hot Water Supply Temperature • 4 clear operation modes According to OAT • Aim to increase energy efficiency • The inconsistency recorded in 2009 is not a performance error, but a new operation strategy Scatter Plot for Hot Water Supply Temperature vs. Outside Air Temperature 62. Differential pressure • Differential pressure between the supply and return side of water systems • Functional intent: ensure that all components that are connected to the system are served with the required water flow • The target value is based on the control strategy, but typically constant Schematic on sensor locations for Main hot water loop 72. Differential pressure • 3 stepped operation mode for differential pressure of hot water loop of Year 2009 • Most likely operational issues, not sensor issues • The system might be in trial and testing period? 82. Differential pressure • System operates fine for 2010 and 2011 Assign Green Light • Constant differential pressure maintained throughout the time span in general 93. Hot Water Loop for Representative Office 341 Schematic on sensor locations for Main hot water loop • Representative offices have been equipped with various sensors • Functional intent: measure key data on the space level 103. Hot Water Loop for Representative Office 341 • In general, the how water loop is functional for Room 341 • It seems the UnOccHeatingSetpoint is not functioning  Assign yellow light 113. Hot Water Loop for Representative Office 341 • Functional intent of heating setpoint: set a threshold for hot water loop • UnOccHeatingSetpoint is clearly not functioning • The hot water flow rate peak seems not correlated to space temperature  further study on the correlation between space temperature and hot water flow rate UnoccHeatingSetpoint 12• Scatter plot identifies the correlation between hot water flow rate and space temperature • No obvious correlation between the two variables • What determines the hot water flow rate? 3. Hot Water Loop for Representative Office 341 13Steam System Overview • Produced at Cardinal Cogen • Connects to Hot Water Loop • Steam Flow Rate = Great Indicator of Whole Building Heating Use 14Midnight Ramp-Up Issue • Midterm Report = midnight ramp-up of steam production • Looked into deeper for final • Not a building issue, rather a SEE IT issue w/ Carpet Plots • Fix issue before using carpet plots again DateTime M2:Hot Water Loop-Steam-FlowRate-(1141)-[lb/hr] 4/2/2011 22:00 771.8 4/3/2011 0:00 747.7333333 4/3/2011 23:00 728.8666667 4/4/2011 0:00 690.4333333 4/4/2011 23:00 618.6666667 4/5/2011 0:00 607.5 15Actual Heating >> Design Heating • Problem #25 - 2009 • Actual Heating ≈ ASHRAE Standard • Actual Heating >> Design Heating • ARUP Employed to fix • An increase in heating between 2009 and 2011 if anything 16PV Discussion • Experimental PV’s – Mono, Poly, Thin Film • Expect no electricity production at night – No isolation • Slow increase of energy overtime • Obviously something wrong – Sensor or Math Issue • Recommendation – Fix ASAP so experiment can be done well DateTime M2:Photovoltaic-ThinFilmArray-WattHr-(1093)-[BTU] M2:Photovoltaic-MonoArray-WattHr-(1094)-[BTU] M2:Photovoltaic-PolyArray-WattHr-(1102)-[BTU] 1/1/2011 0:00 2396927.454 6474196.302 6196984.353 1/2/2011 0:00 2397951.636 6477268.848 6200056.899 1/3/2011 0:00 2398293.03 6478634.424 6201422.475 1/4/2011 0:00 2401706.97 6489217.639 6211322.902 1/5/2011 0:00 2404779.516 6498435.277 6219857.752 1/6/2011 0:00 2407510.669 6506287.34 6227368.421 1/7/2011 0:00 2409900.427 6513798.009 6234537.696 1/8/2011 0:00 2411607.397 6518577.525 6238975.818 1/9/2011 0:00 2413314.367 6524039.829 6244096.728 1/10/2011 0:00 2414679.943 6528136.558 6247852.063 1/11/2011 0:00 2416386.913 6533598.862 6252972.973 1/12/2011 0:00 2417411.095 6537695.59 6256728.307 1/13/2011 0:00 2419800.853 6544182.077 6262873.4 1/14/2011 0:00 2422190.612 6551692.745 6269701.28 1/15/2011 0:00 2425604.552 6561251.778 6278918.919 1/16/2011 0:00 2426970.128 6565348.506 6282674.253 1/17/2011 0:00 2428335.704 6570469.417 6287453.77 1/18/2011 0:00 2429018.492 6572517.781 6289160.74 1/19/2011 0:00 2430384.068 6576273.115 6292574.68 1/20/2011 0:00 2432091.038 6581394.026 6297354.196 1/21/2011 0:00 2433456.615 6585832.148 6301450.925 1/22/2011 0:00 2433456.615 6586514.936 6302133.713 1/23/2011 0:00 2435163.585 6591977.24 6306913.229 1/24/2011 0:00 2438236.131 6600512.091 6315106.686 1/25/2011 0:00 2438577.525 6602560.455 6316813.656 1/26/2011 0:00 2439260.313 6604608.819 6318520.626 1/27/2011 0:00 2439260.313 6605633.001 6319544.808 17How to Use Wiki • Table of Contents – Each System is Header • Abstract first – summary of all findings • For Each System – Overview, Diagram, Hierarchy and 2011 Findings • Guide for understand at bottom 18Comments / Recommendations • Systems – Hot Water Loop • Update consumption sensor (ID# - 10000) – Steam • Employ ARUP to change BMS dealing with steam consumption (heating model) – PV’s • Sensor/Math error for all arrays • Fix ASAP for experiment’s sake • Rep. Office 341 – Change occupant, move sensors or add more rep. rooms • SEE IT –