Ohio Energy Workshop Q Case Study: Combined Heat & Power (CHP) Installation Using Microturbine Technology … Potential for Industry to Generate Electricity & the Economics Tuesday, February 18, 2014 3:15 p.m. to 4:30 p.m. Biographical Information Tom Fitzpatrick, PE, Power Department Manager SSOE Group, 1001 Madison Ave. Toledo, Ohio 43604 Phone: 567.218.2328 Fax: 419.255.6101 [email protected] Tom has over 30 years of experience in the power industry and serves as SSOE’s Power Department Manager. In this role he is responsible for the management of various utility related projects for industrial, municipal, and institutional facilities. Tom has been involved in various power plant and Combined Heat and Power (CHP) projects. Most recently, he completed Boiler MACT studies for three confidential clients as well as a CHP study for a University. Tom received his Bachelor of Science in Environmental Engineering from Syracuse University. In addition, he also holds a Master of Science in Mechanical Engineering from Princeton University and a Masters of Business Administration in Finance from the University of Toledo. Recently, Tom co-authored an article titled “What Now – Complying with Major- and Area-Source Boiler Rules” in HPAC Engineering Magazine. He is a registered Professional Engineer (PE) in seven states and a Certified Energy Auditor (CEA) and works in SSOE’s Toledo, Ohio office. Case Study: Combined Heat & Power (CHP) Installation Using Microturbine Technology 18th Annual Ohio Energy Management Conference February 18, 2014 Tom Fitzpatrick, PE Department Manager – Power Group Agenda • SSOE overview • CHP project overview • Installation and equipment overview • Design and permitting • Installation • Commissioning • Lessons learned SSOE Group Full-service, global EPCM firm Founded in 1948 Privately-owned ISO 9001:2008 certified 1,100+ associates Core competency: project management and project delivery systems • Leaders in Virtual Design & Construction (VDC) • • • • • • Our Mission Company Mission • We make our clients successful by delivering the highest value engineering, architectural, and project delivery services Company Vision • Be the company of choice by clients and employees • Build a sustainable, global, project delivery organization • Provide career growth and wealth creation opportunities for our employees • Be a role model for support of environmental sustainability Value Promise SSOE returned of our fee in project savings to clients in 2013. SSOE Office Locations – U.S. Quality • ISO 9001: 2008 certified • Only one non-conformance finding in 15 years • Annual third party surveillance audits at randomly selected locations • In-house Lean Six Sigma program – 3 Black Belts on staff, supported by team of 11 Green Belts • Goal of 5% efficiency improvements year over year $1.5 million 2013 savings from Lean Six Sigma Case Study: CHP Installation Veterans Administration (VA) Hospital in Ann Arbor, MI Installation of 1,000kW Microturbine CHP system to provide electricity and steam to central utility plant Case Study: CHP Installation VA Hospital Complex – Energy Center Case Study: CHP Installation VA Hospital Complex – Energy Center • DTE Energy – Electric and Natural Gas provider • Four Cleaver Brooks Package Boilers 3@ 700 HP 1@ 500 HP – Generate 68 PSIG Saturated Steam • Two 40 kV Circuits feed two 10 MVA transformers • Chillers – Three 800 ton centrifugal units • Natural Gas – 12” 100 psig line at street – 4” 5 psig line to Energy Center Case Study: CHP Installation VA Hospital Complex – Energy Use • Average annual energy consumption • 24,320 MWH Electric • 130,000 MMBTU Natural Gas • Typical loads • Electric: 2,500 kW baseload and 4,700 kW summer peak • Steam: 8,000 pph baseload and 30,000 pph winter peak • Average annual utility costs • $2.4 Million ~$0.098 per KWH average • $0.52 Million ~$4 per MMBTU Request for Proposals 800 KW min. cogeneration unit Natural gas shall be the primary fuel. The ability to use No. 2 fuel oil is desired but not required. Emissions of Nitrogen Oxides (NOx) shall not exceed 0.4 lbs/MWH. Require no lubricating oils or coolants. The type of electrical generation technology is to be determined by the bidder. There is a preference to use waste heat to preheat combustion air; however, the ultimate choice of waste heat technology is to be determined by the bidder. Produce power at 277/480 60 Hertz (Hz). Sound levels, no more than 65 dba @ 10 ft. All material and equipment used in this project shall be standard components, regularly manufactured and available and not custom-built especially for this project unless approved by the VA-COTR. Only domestic construction material shall be used in performing this project. Project Summary • CHP System integrated into existing central utility plant steam and electrical system • 1,000 kW Natural Gas microturbine with heat recovery steam generator • Using existing pad originally designed for another package boiler • Extend 5 psig natural gas line • Tie into existing Energy Center Bus 2, 3200A, 480 volt Design • Design-Build project • DeMaria Building Company (DBC) and SSOE Group – Full mechanical and electrical integration • Original feasibility study called for separate facility for CHP unit located behind parking garage – Ultimately integrated into existing energy center – Tie into feedwater, water treatment, and blowdown systems Permitting • Air Permit only environmental permit to procure • In addition to Energy Center the VA complex has seven (7) diesel fired generators and one ethylene oxide sterilizers • VA Facility is a minor source of air pollutants • Potential To Emit for 1,000 KW Unit – NOx 1.8 TPY, CO 4.8 TPY, CO2 5,500 TPY • Minor Source Permit To Install Required – No Dispersion Modeling – No Public Comment Period – No CEMS Required Equipment • 1,000 kW Capstone natural gas microturbine – (5) 200 kW units – 1.375 MMBTU/hr. exhaust energy per module • Cain Heat Recovery Steam Generator (HRSG) – 2,300 Lbs. Steam/hr. • One Boiler Feed Pump • 2,000A, 480 Volt Breaker • Metering with visible disconnect • SEL relays Capstone Turbine - Five 200kW Modules Characteristic Performance Output 200kW net Total System Efficiency 70% Fuel Flow 2,280,000 BTU/hr − HHV Steady State Exhaust Temperature 535°F (280°C) Total Exhaust Energy 1,350,000 BTU/hr Emissions NOx (<9 ppm) @ 15% O2 Noise Level 65 dBa at 10 meters Voltage 480 VAC 3 phase, 4-wire wye. 60 Hz SA Voltage 150−480 VAC, 50−60 Hz Weight 2270kg (5,000 lbs). 7000 lbs for SA Size 98”h x 67”w x 144”d Cooling Potential 60 tons Capstone Turbine – Package Assembly 200kW modules combined in 40’ long ISO container package C600 C800 C1000 Capstone Turbine – Microturbine Core • Air bearings – No oil or grease • Air cooled – No anti-freeze or liquids • Variable speed – Up to 98,000 rpm Capstone Turbine – Power Electronics • Inverter Based – UL1741 Capstone Turbine Inverter based vs. traditional generators • Power electronics based 60Hz sine wave production with near unity power factor. – Combustion equipment can rotate at any frequency – “Smart” inverters can generate Kvar’s as needed • Lead/Lag and be programmed to support local grid conditions • UL1741 inverter certification includes IEEE1547 compliance. – Same as a Solar Array inverter – Utilities may still want additional relaying external to the inverter(s) Capstone Turbine - Installed Heat Recovery Steam Generator • 68 psi VA System – Up to 150psi available • 2,300 pph max output from 1,000 KW system HRSG Installation • Tie ins for gas, steam, blowdown, feedwater • Platform Built over turbines for HRSG • Full exhaust ductwork bypass of HRSG • Use ambient air for combustion and cooling • Electrical design – Arc flash study – Relay coordination study – Short circuit analysis • 40 month project schedule – October 2011 notice to proceed – January 2014 start-up Installation – HRSG Platform Installation – Gas and Electric Stack – Match Existing Expected Performance Gross Generation - KW Net Generation - KW Unit Cost of Electricity - $/KWH Savings in Electricty Cost - $/Hr Flue Gas Temperature Entering HRSG - F Flue Gas Temperature Leaving HRSG - F Steam Flow - Lbs/Hr Net Generation - BTU/Hr Net Steam Produced - BTU/Hr Total Useable Electricity and Heat - BTU/Hr Heat Rate - BTU (HHV)/Gross KWH Fuel Input - BTU/Hr Overall Efficiency Reduction in package Boiler Gas Use - BTUs/Hr Net Increase in Natural Gas Use - BTUs/Hr Cost of Natural Gas - $/MMBTU Increase in Natural Gas Cost - $/HR Net Savings in Power and Natural Gas Cost - $/HR Potential Annual Power and Natural Gas Savings 300 273 $0.0980 $26.73 525 380 640 930,937 644,698 1,575,635 11,400 3,420,000 46.1% 786,217 2,633,783 $4.00 $10.54 $16.20 $141,873 1,000 938 $0.0980 $91.90 525 380 2,120 3,200,582 2,135,563 5,336,145 11,400 11,400,000 46.8% 2,604,345 8,795,655 $4.00 $35.18 $56.72 $496,850 Project Challenges Electrical Interconnection • Significant delays due to electrical utility interconnection process. • Start process early and plan plenty of schedule lag. • Interconnection requirements may add non-trivial unexpected costs. Thank You! Tom Fitzpatrick, PE Department Manager, Power SSOE Group 567.218.2328 [email protected]
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