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Objectives

Objectives. Talk about the final projects Guest Speaker Discuss HW2 and HW3 problems. Guest Speaker. Amanda Berens Energy Steward, Facilities Maintenance The University of Texas at Austin. Energy Utilization Index Projected to 2020. The “Dirty 30” Annual Energy Use.

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Objectives

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  1. Objectives • Talk about the final projects • Guest Speaker • Discuss HW2 and HW3 problems

  2. Guest Speaker Amanda Berens Energy Steward, Facilities Maintenance The University of Texas at Austin

  3. Energy Utilization IndexProjected to 2020

  4. The “Dirty 30” Annual Energy Use • ($1,384,000) Fuel Rate Only • ($3,214,000) Fully Burdened • ($732,000) • ($1,691,000) • ($610,000) • ($1,436,000)

  5. Energy Conservation Measures • Technical • HVAC Scheduling • Hot deck & cold deck resets • Lab ventilation air change reduction • General maintenance • Building optimization • Behavioral • Lights out campaign • UTake Charge Challenge • Lab equipment • Events

  6. Overview of Hot/Cold Deck Operation • Heating Coil • T • To Office • Return Air • Hot Deck • Mixing Box • T • Supply Air • Return & OA Air • Cold Deck • T • Cooling Coil

  7. Problem #1 – Hot Deck Reset Savings • Calculate steam consumption reduction over a year due to hot deck reset adjustments. • Given: • Assume a 10,000 CFM Dual Duct AHU system • Original hot deck temp set point = 120 oF • New hot deck temp set point = 95 oF

  8. Building Automation - Hot/Cold Deck Resets

  9. Problem #2 – Lab Ventilation Reductions • Calculate the reduction in chilled water consumption when a lab air change rate is reduced from 12 to 6 ACH. • Given: • Assume 10,000 CFM Dual Duct 100 % OA AHU • Laboratory room volume • Assume 5 labs with 2,000 CFM of supply and exhaust air

  10. Problem #2 – Lab Ventilation Reductions • 2,000 CFM • 1,000 CFM • 2,000 CFM of OA • 2,000 CFM • 400 CFM • 400 CFM • 600 CFM • 600 CFM

  11. Problem #3 – Increase lab exhaust capacity • ETC has run out of exhaust capacity.  Based on design drawings and actual condition, how can we adapt the building to provide exhaust for a new research on the 9thfloor? • Options: • Reduce hood exhaust rate at existing hoods • Convert exhaust system to VAV • Ductless exhaust system

  12. Final Project Assignment • During the following two classes I will introduce more project topics • You will need to define your project till April 4th • Define project groups • Undergraduate students group of 2 • Graduate students individual projects • Prepare ½ page proposal and email it to me till March 26th • Visit me in my office in-between March 26th and April 4th

  13. HW 2 Design problem 3: problems 8.27 and 8. 28

  14. HW 3 Cooling Cycles Problems: 1) Book: 3.1 (page 69), 2) Book: 3.5 ((page 70), 3) Solve 3. 1 for ammonia, 4) Same like 3.5 for R22 with no intercooler Book 3.9 (pages 70-71) Book 3.10 (pages 70-71) Due date: March 21, 2013

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