CHP at JSC. Melissa McKinley JSC Utilities Manager 4/8/2015

Transcription

1 CHP at JSC Melissa McKinley JSC Utilities Manager 4/8/2015

2 Support Human Spaceflight and Exploration Original Construction Acres 163 Buildings 3,718,091 SF 3226 Civil Servants/5621 Contractors NASA- Johnson Space Center 2

3 2008 Hurricane Ike 2011 Severe Drought Conditions State-Wide CenterPoint Electrical Grid Strained Record Number of +100 degree days Load Shedding by JSC Brown Out Potential December 14, 2012 One truck driver = JSC Site Electrical Outage Energy Goals JSC is red on the metric for energy reduction Regional Greenhouse Gas Emission Reduction CHP is the most cost effective way to reduce carbon footprint Why? 3

4 CHP = Combined Heat and Power JSC/CHP takes pressure off the strained grid CHP provides JSC with an island grid for power Self generation of ~70% of base power consumption Power to CH&CP, MCPP, Selected Critical JSC Facilities JSC controls reliability and availability of the power plant Source reductions at JSC achieve mandated energy savings Regional Greenhouse Gas Emission Reductions Energy Security, Savings, Reliability How does CHP help? 4

5 Proposed 400 PSIG Steam HRSG KV Electric Power to Campus Existing 400 PSIG Steam Proposed 400 PSIG Steam Proposed 400 PSIG Steam Existing Turbine Drive Chiller 1 Existing Turbine Drive Chiller 2 Existing Turbine Drive Chiller 3 Existing 400 PSIG Steam New 500 kw Backpressure Steam Turbine New Backpressure Turbine Generation 125 PSIG Steam Campus Distribution Chilled Water Supply Chilled Water Return Existing Electric Drive Chiller 4 Existing Electric Drive Chiller 5 Existing Electric Drive Chiller 6 Existing Electric Drive Chiller 7 Existing Existing High High Pressure Pressure Boiler 1 Boiler 2 Existing High Pressure Boiler 3 Preferentially Load Steam Turbine Chillers To Minimize Electric Chiller Use CHP at JSC 5

6 Procurement Environmental Legal Technical Nay-sayers Sound Levels Interconnect with Utility NASA Challenges 6

7 Issue Lack of Capital Funds drives Energy Savings Performance Contract Our only other ESPC was 1996 Contract type unfamiliar to current Contracting Officers Mitigation DOE Training held early in the process EMP2 Facilitator very helpful Government Guidance Executive Letter, December 2012, encourages ESPC Executive Order encourages CHP Procurement Issues 7

8 Environmental Assessment required Very detailed and started so early that many details needed updates Permitting Environmental 8

9 Legal Advisors also unfamiliar with contract type Debate on need for many standard items Interconnect Agreement Well, let s start with whether we even need this thing x3 Legal 9

10 Issue Lack of education on how CHP is beneficial Lack of knowledge on how ESPC can be used Benefits of Island Mode discounted Escalation rates and how they are used How will changing electric vs. gas rates affect operation of plant? Requirement for 95% uptime Early design decisions revisited and revisited with each new team member No advocate at HQ Mitigation Lots of talking, charts and meetings Technical Nay-sayers 10

11 Issue Detailed sound analysis performed Concern over sound in nearby roads and buildings Mitigation Explanation of how db add (not intuitive) Sound Charts of sources Visit to Methodist Hospital unit for real world comparison Sound Levels 11

12 Issues Legal advisors not familiar with agreement Federal version, ERCOT Unclear requirements Benchmarking sources not comparable No federal example available Texas is weird Interconnect with Utility 12

13 Backup slides 13

14 Btu Per Gross Square Foot Site Energy Usage After Credit for CHP JSC Energy Intensity Impact Site Energy Intensity Reduction at JSC After CHP Credit for On-site Generation Johnson Space Center For CHP Reset Baseline in 2015 and 2% Reductions Recent Executive Order Actual BTU/GSF Goal BTU/GSF CHP ESPC Likely Future Goals BTU/GSF 300, , , , ,000 50,000 Year 14

15 Construction cost is ~$46M Center funds not available for investment ESPC provides a funding alternative Presidential letter mandates ESPC for Federal agencies including JSC ESPC finances installation cost + operations and maintenance cost No net impact to JSC budget for term of the loan Upon completion of the loan, JSC realizes savings ESCO provides equipment with 10 years remaining life 20 year term is proposed How do we buy CHP? 15

16 JSC budget is net zero for the life of the contract Project cost (including installation and O&M) is paid to ESCO with savings Utility Bill funds are used O&M for new equipment is included, so no increase to current Facilities contract No need to budget for replacement of major equipment at the conclusion of the contract How does it affect the JSC Budget? 16

17 CHP uses natural gas to make electricity Heat is produced in that process That waste heat is used to produce steam for heating/dehumidification Steam also drives our steam turbine chillers Natural Gas = Electricity + Steam + Chilled Water CHP 17

18 JSC Current Plant Lineup 18