SUSTAINABILITY FOR LABS

Transcription

1 SUSTAINABILITY FOR LABS COLORADO STATE UNIVERSITY CHEMISTRY BUILDING ASHRAE 2017 TECHNICAL CONFERENCE April 28 th, 2017

2 PRESENTERS SEAN CONVERY, PE PRINCIPAL MECHANICAL ENGINEER ERIC RINGOLD BUILDING PERFORMANCE ENGINEERING TEAM

3 LEARNING OUTCOMES Laboratory design for indoor environmental quality & occupant enjoyment Mechanical design for high fume hood density Custom energy modeling parameters for energy recovery and effectiveness LEED Optimize Energy Performance results that meet the 2030 Challenge + HARTMAN-COX

4 AGENDA 01 Project Background 02 Mechanical Challenges & Opportunities 03 Energy Savings 04 Lessons Learned 05 Q+A + HARTMAN-COX

5 01 PROJECT BACKGROUND

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7 PROJECT GOALS Move the HIGH HOOD USERS from the existing Chemistry building Support 115 researchers in organic, inorganic and bio-synthetic chemistry Create FLEXIBLE & DAYLIT laboratories to support chemistry research LEED GOLD Certified (energy efficient)

8 COLLEGE AVE. PITKIN STREET LAKE STREET

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10 PLAN DIAGRAM

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13 ROOF DIAGRAM MECHANICAL SYSTEMS

14 SECTION DIAGRAM MECHANICAL SYSTEMS

15 HOOD DENSITY 103 FUME HOODS (CAPACITY FOR 125)

16 3D COORDINATION MECHANICAL SYSTEMS

17 3D COORDINATION MECHANICAL SYSTEMS

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19 02 MECHANICAL CHALLANGES & OPPORTUNITIES

20 FUME HOOD RECOMMENDED MAKEUP AIR

21 ARCHITECTURAL FLOOR PLAN

22 CONVENTIONAL DIFFUSER VS. FUME HOOD

23 LAMINAR FLOW DIFFUSER

24 UNIVERSITY OF COLORADO BOULDER JENNIE SMOLY CARUTHERS BIOTECHNOLOGY BUILDING

25 UNIVERSITY OF COLORADO BOULDER SUSTAINABILITY, ENERGY AND ENVIRONMENT LABORATORY

26 CHEMISTRY THIRD FLOOR HVAC PLAN

27 THIRD FLOOR AS-BUILT IN PROGRESS

28 10 LBS OF IN A 5 LB BAG

29 10 LBS OF IN A 5 LB BAG

30 HOW TO DEAL WITH THE ENERGY HOG? CONVENTIONAL ENERGY RECOVERY VERSUS HIGH EFFICIENCY INTELLEGENT RECOVERY

31 CONVENTIONAL GLYCOL RUN-AROUND ENERGY RECOVERY TITLE????????

32 HIGH EFFICIENCY INTELLIGENT GLYCOL RUN-AROUND TITLE????????

33 EXHAUST AIR ADIABATIC COOLING

34 TITLE??????? HIGH EFFICIENCY INTELLIGENT GLYCOL RUN-AROUND

35 03 ENERGY SAVINGS

36 HEAT RECOVERY AND WHOLE-BUILDING: ENERGY ANALYSIS FOR UNIVERSITY LABORATORY BUILDING Pay backs Smart decision making Experience in lieu of industry default for modeling

37 CSU CHEMISTRY ANALYSIS OVERVIEW LEED Attainment LEED NC 2009 Gold HVAC First Cost Analysis Base bid glycol run-around heat recovery system vs. High Performance energy recovery system

38 HEAT RECOVERY MODELING equest: Limited system modeling options Various HX model configurations Single effectiveness input value Fairly detailed fan power inputs Limited control inputs

39 HEAT RECOVERY MODELING IES-VE: More detailed air-side systems Single HX configuration Single effectiveness input values Minimal Fan Power Inputs Flexible control with available airside controllers

40 HEAT RECOVERY MODELING EnergyPlus: HeatExchanger:AirToAir:SensibleandLatent Flexible air-side system modeling Multiple HX object models Effectiveness as a function of air flow rate Minimal Fan Power Inputs Internal and external control options Pumping power as external calculation Preferred choice for modeling nonstandard HX systems.

41 HEAT RECOVERY SYSTEM MODELING Exhaust Fan Heat Exchanger Adiabatic Cooler Set Point Controllers AHU Components

42 GLYCOL SYSTEM MEASURED DATA

43 SYSTEM MODELING Energy Model Inputs Glycol Run-Around W/ Evap Precooler Intelligent HR W/ Evap Precooler Air-Air HX Nominal Supply Air Flow Rate 102, ,900 CFM Sensible Effectiveness at 100% Heating Airflow Sensible Effectiveness at 75% Heating Airflow Sensible Effectiveness at 100% Cooling Airflow Sensible Effectiveness at 75% Cooling Airflow Unit Heat Exchanger Control <@55F OAT: System ON, min 55F Leaving Air Temp 55F - 75F OAT: System OFF >75F OAT: System ON, max available cooling System ON controlling to AHU LAT (55F reset to 62F) - Supply Fan Pressure Rise in. W.G. Coil Air Pressure Drop (in.w.g) in. W.G. Exhaust Fan Pressure Rise in. W.G. Evaporative Cooler Effectiveness Evaporative Cooler Setpoint Temp 80F at <70F OAT; 55F at >75F OAT 80F at <55F OAT; 40F at >60F OAT

44 MODEL RESULTS: ANNUAL EFFECTIVENESS RESULTS: Heat Recovery Net Annual Effectiveness Glycol Run-Around W/ Meefog "Intelligent" HR W/ Meefog Recovered Heating Energy (kwh/yr) 729, ,286,015.7 Recovered Cooling Energy (kwh/yr) 147, ,522.9 Total Heating (AHU + Recovered) (kwh/yr) 2,500, ,675,401.6 Total Cooling (AHU + Recovered) (kwh/yr) 750, ,387.4 Annual Fan Energy from Recovery Coil (supply + exhaust) (kwh/yr) 48, ,683.1 Annual Pump Energy (kwh/yr) 140, ,075.9 Net Annual Effectiveness

45 MODEL RESULTS: ENERGY COST & CARBON $250,000 CSU Chemistry Modeled Annual Energy Costs 4,500,000 4,000,000 $200,000 3,500,000 $150,000 3,000,000 2,500,000 $100,000 2,000,000 1,500,000 $50,000 1,000, ,000 $0 No Heat Recovery Base Bid Glycol W/ Evap Intelligent HR W/ Evap Electricity District Cooling District Steam Total Carbon lbs/yr* - *Based on 0.7 kw/ton chilled water plant efficiency, 85% steam plant efficiency, and lbs CO2/MMBtu gas, lbs CO2/kWh electricity

46 MODEL RESULTS: WHOLE BUILDING RESULTS

47 04 LESSONS LEARNED

48 LESSON LEARNED: PAY BACKS Added First Cost = $700,000 Annual Energy Savings Predicted = $67,838 Simple Pay Back = 10.3 Years ROI = 9.7% Carbon Foot print = Saves 1,103,685 lbs of CO2 per Year

49 LESSON LEARNED: PENTHOUSE VS. FLOOR Keep under 33.3% of supporting roof No fire/smoke dampers if its not a floor Talk to code officially specifically

50 LESSON LEARNED: TIGHT WORK ENVIRONMENT Small space & difficult systems = more time

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