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Validation of a Transient Simulation Program (TRNSYS)
Title
Validation of a Transient Simulation Program (TRNSYS).
Creator
Goldiez, Brian F., Klee, Harold, Engineering
Abstract / Description
Florida Technological University College of Engineering Thesis; Although a Transient Simulation Program (TRNSYS) has become a widely used model for simulating a solar energy system, there has not been extensive work done in validating this model with actual data. The approach used to validate this model consisted of a modular buildup of components with validation for each module. Extreme care was taken in choosing the necessary parameters to model each component. Where parameters were not...
Show moreFlorida Technological University College of Engineering Thesis; Although a Transient Simulation Program (TRNSYS) has become a widely used model for simulating a solar energy system, there has not been extensive work done in validating this model with actual data. The approach used to validate this model consisted of a modular buildup of components with validation for each module. Extreme care was taken in choosing the necessary parameters to model each component. Where parameters were not given, they were either derived or reasonable values were selected based upon general conditions prevailing in Central Florida or conditions which are generally true for certain solar hot water systems. The intent of this approach was to avoid forcing the model to fit experimental data. Such forcing can cause present results to correlate favorably, but gives no assurances for model performance in future simulations which may be made for varying conditions or completely different systems.
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Date Issued
1979
Identifier
CFR0004772, ucf:52979
Format
Document (PDF)
PURL
http://purl.flvc.org/ucf/fd/CFR0004772
Analytical and experimental investigation of pumped solar hot water systems
Title
Analytical and experimental investigation of pumped solar hot water systems.
Creator
Pearce, Jeffrey B., Evans, Ronald D., Engineering
Abstract / Description
Florida Technological University College of Engineering Thesis; A transient computer model of a forced circulation solar hot water system has been developed. The model allows for capacitance effects by solving the energy balances on a four node model of the solar collector. The tank model is designed to include the presence of an auxiliary heater and to allow for the non ideal condition of load drawoff. Five tests were done to validate the computer model. These tests include a comparison of...
Show moreFlorida Technological University College of Engineering Thesis; A transient computer model of a forced circulation solar hot water system has been developed. The model allows for capacitance effects by solving the energy balances on a four node model of the solar collector. The tank model is designed to include the presence of an auxiliary heater and to allow for the non ideal condition of load drawoff. Five tests were done to validate the computer model. These tests include a comparison of the computer simulation with experimental data and a model available in the literature. The results of these tests indicate that the computer model is able to predict the collector inlet and outlet temperatures within 10% for typical operating conditions.
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Date Issued
1975
Identifier
CFR0003463, ucf:53033
Format
Document (PDF)
PURL
http://purl.flvc.org/ucf/fd/CFR0003463
AN OPTIMAL CONTROL APPROACH FOR DETERMINATION OF THE HEAT LOSS COEFFICIENT IN AN ICS SOLAR DOMESTIC WATER HEATING SYSTEM
Title
AN OPTIMAL CONTROL APPROACH FOR DETERMINATION OF THE HEAT LOSS COEFFICIENT IN AN ICS SOLAR DOMESTIC WATER HEATING SYSTEM.
Creator
Gil, Camilo, Simaan, Marwan, University of Central Florida
Abstract / Description
Water heating in a typical home in the U.S. accounts for a significant portion (between 14% and 25%) of the total homeÂÂÂÂ's annual energy consumption. The objective of considerably reducing the homeÂÂÂÂ's energy consumption from the utilities calls for the use of onsite renewable energy...
Show moreWater heating in a typical home in the U.S. accounts for a significant portion (between 14% and 25%) of the total homeÂÂÂÂ's annual energy consumption. The objective of considerably reducing the homeÂÂÂÂ's energy consumption from the utilities calls for the use of onsite renewable energy systems. Integral Collector Storage (ICS) solar domestic water heating systems are an alternative to help meet the hot water energy demands in a household. In order to evaluate the potential benefits and contributions from the ICS system, it is important that the parameter values included in the model used to estimate the systemÂÂÂÂ's performance are as accurate as possible. The overall heat loss coefficient (Uloss) in the model plays an important role in the performance prediction methodology of the ICS. This work presents a new and improved methodology to determine Uloss as a function of time in an ICS system using a systematic optimal control theoretic approach. This methodology is based on the derivation of a new nonlinear state space model of the system, and the formulation of a quadratic performance function whose minimization yields estimates of Uloss values that can be used in computer simulations to improve the performance prediction of the ICS system, depending on the desired time of the year and hot water draw profile. Simulation results show that predictions of the systemÂÂÂÂ's performance based on these estimates of Uloss are considerably more accurate than the predictions based on current existing methods for estimating Uloss.
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Date Issued
2010
Identifier
CFE0003266, ucf:48525
Format
Document (PDF)
PURL
http://purl.flvc.org/ucf/fd/CFE0003266