排放蒸汽區域蒸汽系統脫碳 .pdf

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1、Click to edit Master title style2_Title SlideBlowing Off Steam:Decarbonizing District Steam Systems Thursday April 4th,2024 1:30 2:30 pm ET Bri Colon U.S.Department of Energy University of Virginia District Energy System Project 1234Agenda Mayo Clinic Utility Master Plan Goals and Results Central Ch

2、allenges and Opportunities with District Steam Welcome and Introductions 5Closing and Q&A Polling Instructions Please navigate to the session in the app and select Polls from the menu Todays Poll Questions 1.)What sector best describes your organization?2.)What role do you play in your organization?

3、3.)What challenges have you experienced related to decarbonizing a district steam system?4.)What successes have you experienced related to decarbonizing a district steam system?Todays Presenters Nancy Kohout,Technical Account Manager Lawrence Berkeley National Laboratory Affiliate Paul Zmick,Directo

4、r of Energy and UtilitiesUniversity of Virginia Mike Luster,Utility Section Head Facilities ManagementMayo ClinicNancy Kohout Lawrence Berkeley National Laboratory Affiliate Approach to Emissions Reduction Understanding Load Profile Planning to Meet Our Goals Paul Zmick University of Virginia Univer

5、sity of Virginia Blowing Off Steam:Decarbonizing District Steam Systems Better Buildings,Better Plants Summit Paul Zmick,Director of Energy and Utilities UVA Today Founded in 1819 204 yearsold Public University 19.1M SQFT 569 Buildings 1240 Acres on Grounds 25.3K Enrollment 22.8K EmployeesUVA Energy

6、&Utilities 58 miles of steam,hot water,and chilledwater 43 miles of 13kV power 6.3 miles of walkable tunnels 5 thermal utility plants 9 chilled water plants 6 heating loops 7 chilled water loops 1 2M gallon CHW TES 3 13kV substations2020 Ivy Mountain 140F 1978 North Grounds 140-180F2005 Massie Road

7、190F 140F 1950 Main Heat Plant 180#170F 2026 Fontaine 115F District steam for over 200 yearsMain Heat Plant 1950 300K PPH steam(coal,gas,oil)80 MMBH hot water(gas,oil)30 MMBH hot water(electric)Three small plants combined 92 MMBH hot water(gas,oil)30 MMBH hot water(electricity)Fontaine Zero Combusti

8、on 13 MMBH hot water(HRC)8.25 MMBH hot water(electric)45,000 tons chilled water capacity35+electric chillers56 MW peak demandProduction Combustion with Fossil Fuel Lowest operating cost No capital cost(moderate with coal conversion)Low fuel risk Combustion with Renewable High operating cost Signific

9、ant capital cost Moderate fuel risk Electrode boiler Highest operating cost Extensive capital cost Low fuel risk(must address firm fuel)Fission Currently in demonstration TBD on operating cost/capitalGeo-exchange cannot produce steamRealities of Steam Production UseHeating buildingsSurgical steriliz

10、ationMedical waste sterilizationAutoclavesHumidificationDomestic water productionImpacted by LTHW Project:8 million square feet 180 Buildings 70 blending loopsUVA Main Grounds:565 Buildings with 19,500,000 square feet Tunnel/Steam Piping:6+miles Heating Water Piping:23 miles Plastic Heating Water Pi

11、ping:5 milesLow Temperature Hot Water System Overview MPS Building Conversion MTHW Building Conversion LTHW Building Conversion-De-activated MPS Existing MPS New LTHW Convert MTHW to LTHW Existing LTHW New MTHW Existing MTHW 22 MPS to LTHW Buildings 47 MTHW to LTHW BuildingsLow Temperature Hot Water

12、Steam,Medium Temperature and Low Temperature Buildings Major Project Scope Phase 1:MTHW to LTHW($6.5M)Phase 2:Heat Recovery Chiller($10.2M)Phase 3:Steam to LTHW($21.7M)Building Conversion Options:Heat Exchangers HUB Concept Blending LoopsLow Temperature Hot Water Additional Cooling Energy:o 11,300MW

13、h/yr Additional Scope 2 Carbon:o 10,590MTCDE/yr Annual Heating Energy Saved:o300,000 MMBtu/yr Scope 1 Carbon Saved:o 22,390MTCDE/yr Net Carbon Emissions Saved:o 11,800MTCDE/yr Project ScopePreconstruction Questions:Control System Maintenance Zone Asbestos HX Quantity Reheat on LTHW Domestic Hot Wate

14、r servedby LTHW Construction Day Estimates Time of Year forConstructionLow Temperature Hot WaterBuilding DetailsHX HX HX HX HX HX HX HX Existing Steam System New LTHW System Low Temperature Hot Water Reuse of Steam Infrastructure Piping Materials Pre-Insulated Steel PEXGOL(DR6,DR9)HDPE-RT(DR9)AquaTh

15、erm(DR9)Nupi Niron(DR9)Low Temperature Hot Water Piping Materials PEXGOL Nupi Niron AquaTherm Low Temperature Hot WaterPiping MaterialsHDPE-RT Pre-Insulated Steel Pre-testing buildings for new lower temperatures was important Building heights now matter increased expansion tank pressures You will un

16、cover existing issues within buildings plan for it Uptime of domestic hot water.Generate a testing plan.Watch your make-up water for leaks much larger system volume Existing systems age and existing condition(steam radiators toheating water)Installation details.It only takes one misstep to generate

17、a leak.Low Temperature Hot Water Lessons Learned Lessons Learned Mike Luster Mayo Clinic 2020 Mayo Foundation for Medical Education and Research|slide-27 Agenda Introduction to Mayo Downtown Campus Downtown Campus Utility Master Plan Goals and Results Unbound Program Opportunity Current Status 2020

18、Mayo Foundation for Medical Education and Research|slide-28 Mayo Downtown Campus Buildings Served:26 Existing Building Area:8.1 million sq.ft.Mayo Downtown Campus District Energy served from two plants.Franklin Heating Station and Prospect Utility Plant.FHS constructed in 1928.PUP in 2000.Co-generat

19、ion plants.Each plant contains a mix of thermal and power production assets.Peak Chilled Water Demand:20,700 Tons.Mix of Steam Driven and Electric Driven Chillers.Peak Steam Demand:287,000 PPH.Normal Power Demand:28 MW.Essential Power Demand:9 MW.2020 Mayo Foundation for Medical Education and Resear

20、ch|slide-292020 Mayo Foundation for Medical Education and Research|slide-30 2022 Utility Master Plan Update Phase 1 The purpose of the first phase of the Downtown Campus Utility Master Plan Update was to identify utility strategies to meet campus growth for evaluation in Phase 2.The growth was being

21、 driven by the Unbound Project.Key Drivers Evaluated Mayo Clinics goals and objectives Reliability and Redundancy Resiliency Key Driver Generate 40%Electricity consumed onsite Sustainability Flexibility O&M Cost Capital Cost Campus growth and future utility demands Strategies to meet GHG goals 2020

22、Mayo Foundation for Medical Education and Research|slide-31 2022 Utility Master Plan Update Phase 1 Phase 1 Considered Strategies to meet sustainability goal of 50%GHG reduction in 10 years Downtown Campus conversion to heating hot water Equipment sizing for the Prospect Utility Plant(PUP)Expansion

23、Sustainability Considerations Better Climate Challenge(10 Yr.50%carbon reduction goal)Understand pathways to 100%carbon reduction RPU Powers commitment to 100%renewable electrical energy by 2030 2020 Mayo Foundation for Medical Education and Research|slide-32 DOE provides:Technical assistance Facili

24、tates peer-to-peer learning opportunities Sharing the work of leaders Highlighting real-world replicable solutions Mayos responsibility:Public pledge Develop organization-wide plan with GHG emissions reduction milestones Participate in one working group Report data annually for duration of 10-year c

25、hallenge Mayo Clinic Goals Reduce portfolio-wide GHG emissions(scopes 1&2)by 50%by 2032*Reduce energy use intensity(EUI)by 20%by 2032*Without the use of carbon offsets 2020 Mayo Foundation for Medical Education and Research|slide-33 2022 Phase 1 Utility Master Plan Results Base strategy of“status qu

26、o”traditional chiller and steam boiler equipment will not meet GHG reduction goal Alternative strategies identified to meet GHG reduction goal Simplified Base Case Operational changes only.Heating water cogeneration Addition of a gas turbine for additional resiliency along with significant conversio

27、n to heating water with heat pump chillers and geoexchange.Heating water electrification Significant conversion to heating water with heat pump chillers and large geoexchange installations.2020 Mayo Foundation for Medical Education and Research|slide-34 Unbound Program Utility selection for Unbound

28、occurred prior to completion of DTC Master Plan Unbound selected a heating water cogeneration strategy Prospect Plant Expansion 8MW Cogen,Chilled Water and Diesel Generators Geoexchange System Open Loop Ground Source Heat Pump Chillers Leverages Inflation Reduction Act for tax credits Strategies to

29、meet 50%GHG reduction in 10 years Plan for long term Downtown Campus conversion to heating hot water 2020 Mayo Foundation for Medical Education and Research|slide-35 Mayo 135 12 Gonda 125 Ozmun Site Logistics Damon Site South Parking North Parking Utility Master Plan Unbound Evaluation 2020 Mayo Fou

30、ndation for Medical Education and Research|slide-36 2020 Mayo Foundation for Medical Education and Research|slide-37 2020 Mayo Foundation for Medical Education and Research|slide-38 2020 Mayo Foundation for Medical Education and Research|slide-39 Ozmun&Damon Energy Model Building Cooling Load Buildi

31、ng Heating Load 2020 Mayo Foundation for Medical Education and Research|slide-40 Unbound Building Loads Phase 1 Description Area(SF)Cooling(Tons)Peak Heating(MBH)Humidification(lb/hr)Process Steam(lb/hr)Domestic Preheat(MBH)Domestic Trim Heat(MBH)Phase 1 1,930,000 5,350 64,680 16,740 17,000 10,750 7

32、,625 2020 Mayo Foundation for Medical Education and Research|slide-41 Building Decarbonization Strategies Dual desiccant wheels for operating rooms Energy recovery Dedicated Outside Air Runaround Loop Maximize energy recovery to increase simultaneous heating and cooling load 1000 T of simultaneous f

33、rom Unbound Additional simultaneous from energy recovery in other buildings on campus Adiabatic Humidification Alternative methods to generate steam for sterilization 2020 Mayo Foundation for Medical Education and Research|slide-42 Open Loop Geothermal 2020 Mayo Foundation for Medical Education and

34、Research|slide-43 Open Loop Geothermal Proposed 3 Extraction Wells and 9 Injection Wells in the Jordan Aquifer.Anticipated capacity 750 GPM per Extraction Well.Injection and Extraction Wells minimum of 1000 feet of separation.Injection to Injection Well minimum of 200 feet of separation.Extraction t

35、o Extraction Wells minimum of 200 feet of separation.Test Wells Drilled in April 2024.Seeking Permit from DNR.Extraction Well(Typ)Injection Well(Typ)2020 Mayo Foundation for Medical Education and Research|slide-44 Utility Plant and Underground Infrastructure Prospect Expansion Boilers/Chillers/CHP O

36、zmun Heat Pump Chillers Geothermal Wells Geothermal Wells Start of Heating Hot Water Distribution Loop Ozmun and Damon 6th Ave Pedestrian Tunnel Q&A Your Feedback is Important to Us Use the 2024 Summit mobile app to:Find sessions by track Build your personal schedule Network with attendees Learn about speakers Provide feedback on the Summit Download Whova from the App Store or Google Play and search for the event Better Buildings Summit