St. Paul District heating system conceptual design study and report. Appendix C of market assessment and economic analysis of the St. Paul District Heating Demonstration project
The goals of the St. Paul District Heating Demonstration Project are (1) to assess the detailed economic feasibility of a hot water, cogeneration district heating system serving the central business district of St. Paul, Minnesota, and (2) to develop an implementation plan for financing and construction of the first phase of the system over a four-five year time span. This report presents the results of a conceptual design for a 270-MW(t) hot water district heating system serving the central business district of St. Paul and the nearby State Capitol Complex. The system design is based on extensive European hot water design and operating experience. The base heat source for the system is the Northern States Power Co. (NSP) High Bridge Power Plant which has three turbines that can be retrofitted to either extraction or back-pressure cogeneration operation. Hot water at 250/sup 0/F (121/sup 0/C), produced in steam-to-water heat exchangers, is transported to the St. Paul central business district 0.8 miles (1.3 km) away. This conceptual design includes the supply-and-return transmission lines from the High Bridge Plant but does not include the design and cost of piping, heat exchangers, pumps, and controls for retrofitting the High Bridge Plant to cogeneration operation. The system design and construction costs developed in this study are based on the geotechnical analysis of the market area, piping design criteria including code requirements, and piping installation procedures that maximize system reliability and maintainability. The construction cost is developed for a four-five year construction phase based on analyses of the market by the St. Paul DHDC. The total construction cost for the hot water transmission and distribution system in mid-1980 (ENR index = 3200) prices is $29,000,000 including engineering and contingencies. Plant modifications to three power plants for system peaking and reserve requirements are estimated at $4,009, 500.
- Research Organization:
- Oak Ridge National Lab., TN (USA)
- DOE Contract Number:
- W-7405-ENG-26
- OSTI ID:
- 5201742
- Report Number(s):
- ORNL/TM-6830/P10-Vol.2; ON: DE82010329
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
29 ENERGY PLANNING
POLICY AND ECONOMY
DISTRICT HEATING
DESIGN
FEASIBILITY STUDIES
HEAT DISTRIBUTION SYSTEMS
COST
COGENERATION
DEMONSTRATION PROGRAMS
ECONOMIC ANALYSIS
FINANCING
HOT WATER
MINNESOTA
SPECIFICATIONS
DEUS
ECONOMICS
ENERGY SYSTEMS
FEDERAL REGION V
HEATING
HYDROGEN COMPOUNDS
NORTH AMERICA
OXYGEN COMPOUNDS
POWER GENERATION
STEAM GENERATION
USA
WATER
320603* - Energy Conservation
Consumption
& Utilization- Municipalities & Community Systems- Public Utilities- (1980-)
290800 - Energy Planning & Policy- Heat Utilization- (1980-)