Utah State University Logan Utah. Founded 1888 as a Land Grant Institution Host City – Logan, Utah...

Utah State UniversityLogan Utah

Founded 1888 as a Land Grant Institution

Host City – Logan, Utah (48,ooo+ population)

~ 15,000 Students (~ 28,700 students system-wide)

430 Acres of Maintained Grounds

75+ Major Buildings

Utah State University – Logan Campus

4.5 MW Cogen (installed 2004) 50,000 #/hr. HRSG

300 kW Hydro

46 kV North and South Electrical Sub Stations ~ 18 Miles - 12,470 volt Distribution System

240,000 #/hr. Nominal Steam Capacity ~ 12 Miles - Steam Distribution System

5,200 Tons Central Plant Chilled Water Capacity ~ 5 Miles of Distribution Piping

~ 2.5 Miles of Walk-through Tunnels

Utah State Utility Assets

1.2 MW Emergency Generator

Culinary Water Production, Storage & Distribution

Canal & Culinary Irrigation System

Storm Water

Refuse Collection

Recycling & Surplus Operation

Utah State Utility Assets

Procured Natural Gas ~ 545,000 MMBTU @ $3,000,000 / yr. (2008 – 2012)

Procured Electric (Logan Light & Power) *** Energy 34,844,000 kWh @ $2.1 million / yr. (2008 – 2012)

Energy Cost - 49% (2011 & 2012) Demand Cost - 51% (2011 & 2012)

USU Produced Power ~ 55%

USU Procured Power ~ 45% < 10% (WAPA / CRSP) < 5% (Rocky @ Innovation Campus N. Logan)

*** rate study currently underway by LL&P

USU Energy Usage & Cost Profile

Natural Gas Strategies forUtah State University

Transportation CNG busses provide efficient movement of people Reduces environmental impacts Transportation Master Planning

Cogeneration (CHP) Produce and deliver 55% of USU’s electrical energy Provides ~ 40% of USU’s thermal heating requirements Future combined cycle or chilled water production?

Energy Management Construct efficient buildings HVAC commissioning Install lighting retrofits Utilize alternate energy sources

Transportation Systems

Transportation

Natural Gas Fired BussesEmits virtually no visible particulate matter (PM)CNG has 90% less particulate mass than dieselCNG produces less total greenhouse gas emissions

than dieselAt a $0.25 /gal fuel savings = 3 year payback on CNG

bussesCNG offers emission benefits over diesel/hybrids

(1) Department of Energy’s National Clean Cities Program

Cogeneration (CHP)

Combined heat & power

USU Cogen (commissioned in 2004)

4.5 MW NG fired Solar Turbine produces ~ 55% kWh

Meets ~ 1/3 maximum kW demand

Or, ~ 1/2 of average kW demand

HRSG produces steam heat for much of main campus

$14 M project including centralized chilled water

~ $1 M annual combined savings Vs. conventional

http://www.midwestchptap.org/profiles/ProjectProfiles/UtahStateUniversity.pdf

USU Energy Management Strategies

Energy Management

A managed energy program can reduce Energy Utilization by 30% to 35%

USU estimates that 15% has already been achieved from prior energy projects

Energy Utilization is measured and tracked as an index, or ratio of energy use over a measure of building area and time (EUI is normalized for growth)

Energy Utilization Index (EUI) = MBTU (energy) / SQFT (area) / YR (time)

Energy cost savings are treated as “avoided costs” due to non-uniform inflation and volatility in energy markets

Avoided costs savings may not always be realized as a positive cash flow, but will measure the extent that budgets would have increased

Some efficiency measures like lighting upgrades are static. Others require proactive management to be sustainable I.E. Commissioning, Education and Awareness, Building Scheduling

Energy Management Program Components

Continuous Commissioning of HVAC Systems

Metering & Data Analysis

Energy Procurement Management & Oversight

Provides Assistance and Consultation to USU Auxiliaries

Capital Project Design Review

New Facility Commissioning

Campus–wide Education & Awareness

Auditing & Facility Scheduling

Energy Efficiency Projects

Monitoring of Grant & Alternate Funding Environments

Report on Accomplishments

Projected Avoided Cost and Expenses for Ongoing Building Commissioning

Annual Expenses for USU Energy Management (Labor + 43% Benefits)

2 HVAC Technicians $ 115 k (one new HVAC Tech) 1 Energy Engineers $ 72 k (one new Energy Engineer) 1 Energy Auditor / Educator $ 50 k (one new position) 1 Energy Manager $ 93 k (internal and/or one new position) O&M, Material, & Equipment $ 100 k annually

Total Expenses $ 430 k / Yr.

Projected Energy Avoided Cost Savings $ 765 k / Yr. (Estimated at 15% of Average Variable Energy Costs)

Net Avoided Cost Savings = $ 335 k / Yr. after Expenses ($ 500 k / Yr. at Higher Energy Procurement Costs)

Energy Management Accomplishments

Cogeneration & HRSG

Decommissioning Coal / NG Boiler Rebuilds

LED Lighting Retrofits

Centralized Chilled Water

All New LEED Constructed Facilities

Ongoing HVAC Commissioning

Ongoing HVAC Controls Upgrades ~$200K Year

Demand Side Management Strategies

Initiating E.M. Support for Statewide System Campuses

2 Million Gallon Chilled Water Storage Tank – Inside Piping

Off Peak – On Peak Operation

Demand Savings Profile~ 1 MW @ ~ $12,500 / Mo.

TIME 3:33:36 AM 7:09:36 AM10:45:36 AM2:21:36 PM 5:57:36 PM 9:33:36 PM0

1,000

2,000

3,000

4,000

5,000

6,000

7,000

KW_USU_5_31_2012KW_USU_6_1_2012

Exterior of Storage Tank

Below Grade - 2 Million Gallon Capacity

30’ Ht. x 115’ Diameter

$2.5 Million

40+ Year Service Life

$100,000 Yr. Est. Savings @ Current kW Demand

Current Estimated Saving Rate $50,000 - $75,000 Yr.

Provides “firm Capacity” for 1 - 1,800 Ton Chiller ~ $1.25 Million

Payback is well within expected economic service life

Design & Performance Characteristics

Energy Efficiency = Environmental Sustainability

Questions & AnswersQuestions & Answers