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A Model for Optimization and Analysis of Energy Flexible Boiler Plants for Building Heating Purposes

Abstract

This doctoral thesis presents a model for optimization and analysis of boiler plants. The model optimizes a boiler plant with respect to the annual total costs or with respect to energy consumption. The optimum solution is identified for a given number of energy carriers and defined characteristics of the heat production units. The number of heat production units and the capacity of units related to each energy carrier or the capacity of units related to the same energy carrier can be found. For a problem comprising large variation during a defined analysis period the model gives the operating costs and energy consumption to be used in an extended optimization. The model can be used to analyse the consequences with respect to costs and energy consumption due to capacity margins and shifts in the boundary conditions. The model is based on a search approach comprising an operational simulator. The simulator is based on a marginal cost method and dynamic programming. The simulation is performed on an hourly basis. A general boiler characteristic representation is maintained by linear energy or cost functions. The heat pump characteristics are represented by tabulated performance and efficiency as function of state and nominal aggregate capacities. The  More>>
Authors:
Publication Date:
May 01, 1996
Product Type:
Thesis/Dissertation
Report Number:
NEI-NO-788
Reference Number:
SCA: 320106; 421000; PA: NW-97:005219; EDB-97:097273; NTS-97:011976; NTS-97:013410; SN: 97001808104
Resource Relation:
Other Information: TH: Thesis (Dr.ing.); PBD: May 1996
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; 42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES; BUILDINGS; BOILERS; COMPUTERIZED SIMULATION; OPTIMIZATION; ENERGY CONSERVATION; HOUSES; DISTRICT HEATING; OIL BURNERS; ENERGY ACCOUNTING; DYNAMIC PROGRAMMING
OSTI ID:
496311
Research Organizations:
Norges Teknisk-Naturvitenskapelige Universitet, Trondheim (Norway)
Country of Origin:
Norway
Language:
English
Other Identifying Numbers:
Other: ON: DE97753140; ISBN 82-7119-925-0; TRN: NO9705219
Availability:
OSTI as DE97753140
Submitting Site:
NW
Size:
194 p.
Announcement Date:

Citation Formats

Nielsen, J R. A Model for Optimization and Analysis of Energy Flexible Boiler Plants for Building Heating Purposes. Norway: N. p., 1996. Web.
Nielsen, J R. A Model for Optimization and Analysis of Energy Flexible Boiler Plants for Building Heating Purposes. Norway.
Nielsen, J R. 1996. "A Model for Optimization and Analysis of Energy Flexible Boiler Plants for Building Heating Purposes." Norway.
@misc{etde_496311,
title = {A Model for Optimization and Analysis of Energy Flexible Boiler Plants for Building Heating Purposes}
author = {Nielsen, J R}
abstractNote = {This doctoral thesis presents a model for optimization and analysis of boiler plants. The model optimizes a boiler plant with respect to the annual total costs or with respect to energy consumption. The optimum solution is identified for a given number of energy carriers and defined characteristics of the heat production units. The number of heat production units and the capacity of units related to each energy carrier or the capacity of units related to the same energy carrier can be found. For a problem comprising large variation during a defined analysis period the model gives the operating costs and energy consumption to be used in an extended optimization. The model can be used to analyse the consequences with respect to costs and energy consumption due to capacity margins and shifts in the boundary conditions. The model is based on a search approach comprising an operational simulator. The simulator is based on a marginal cost method and dynamic programming. The simulation is performed on an hourly basis. A general boiler characteristic representation is maintained by linear energy or cost functions. The heat pump characteristics are represented by tabulated performance and efficiency as function of state and nominal aggregate capacities. The simulation procedure requires a heat load profile on an hourly basis. The problem of the presence of capacity margins in boiler plants is studied for selected cases. The single-boiler, oil-fired plant is very sensitive to the magnitude of the losses present during burner off-time. For a plant comprising two oil-fired burners, the impact of a capacity margin can be dampened by the selected capacity configuration. The present incentive, in Norway, to install an electric element boiler in an oil-fired boiler plant is analysed. 77 refs., 74 figs., 12 tabs.}
place = {Norway}
year = {1996}
month = {May}
}