Simplified Solar Water Heater Simulation Using on a Multi-Mode Tank Model

Craig Christensen; Jeff Maguire; Jay Burch; Nick DiOrio

Simplified Solar Water Heater Simulation Using on a Multi-Mode Tank Model

Craig Christensen, Jeff Maguire, Jay Burch, Nick DiOrio

Building Technologies and Science Center

National Renewable Energy Laboratory

Research output: Contribution to conference › Paper › peer-review

1 Scopus Citations

Abstract

This paper describes a solar water heater (SWH) simulation model that is simpler, faster, and easier to use than typical detailed simulation models using TRNSYS. For the relatively high collector loop flow rates (with multiple tankturnovers per day) which are typical in U.S. active SWHs, the tank model uses a single-node stratified mode during charging. During discharging when the collector loop is off, the model switches to a tank model that is composed of two variable-volume nodes: the lower (cold) node grows with introduced cold inlet water while the upper (hot) node shrinks with output of hot water. Transition from discharging to charging is handled in mode 3 (two variablevolume nodes with solar gains).This type of tank model was used to develop a simple, non-iterative SWH model. Validation against a detailed SWH simulation model using a 100-node tank showed very good agreement.

Original language	American English
Pages	495-502
Number of pages	8
State	Published - 2014
Event	43rd ASES National Solar Conference 2014, SOLAR 2014, Including the 39th National Passive Solar Conference and the 2nd Meeting of Young and Emerging Professionals in Renewable Energy - San Francisco, United States Duration: 6 Jul 2014 → 10 Jul 2014

Conference

Conference	43rd ASES National Solar Conference 2014, SOLAR 2014, Including the 39th National Passive Solar Conference and the 2nd Meeting of Young and Emerging Professionals in Renewable Energy
Country/Territory	United States
City	San Francisco
Period	6/07/14 → 10/07/14

Bibliographical note

Publisher Copyright:
Copyright © 2014 by American Solar Energy Society.

NREL Publication Number

NREL/CP-5500-62162

Keywords

dual mode
simulation
solar water heaters
SWH

Cite this

Christensen, C., Maguire, J., Burch, J., & DiOrio, N. (2014). Simplified Solar Water Heater Simulation Using on a Multi-Mode Tank Model. 495-502. Paper presented at 43rd ASES National Solar Conference 2014, SOLAR 2014, Including the 39th National Passive Solar Conference and the 2nd Meeting of Young and Emerging Professionals in Renewable Energy, San Francisco, United States.

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abstract = "This paper describes a solar water heater (SWH) simulation model that is simpler, faster, and easier to use than typical detailed simulation models using TRNSYS. For the relatively high collector loop flow rates (with multiple tankturnovers per day) which are typical in U.S. active SWHs, the tank model uses a single-node stratified mode during charging. During discharging when the collector loop is off, the model switches to a tank model that is composed of two variable-volume nodes: the lower (cold) node grows with introduced cold inlet water while the upper (hot) node shrinks with output of hot water. Transition from discharging to charging is handled in mode 3 (two variablevolume nodes with solar gains).This type of tank model was used to develop a simple, non-iterative SWH model. Validation against a detailed SWH simulation model using a 100-node tank showed very good agreement.",

keywords = "dual mode, simulation, solar water heaters, SWH",

author = "Craig Christensen and Jeff Maguire and Jay Burch and Nick DiOrio",

note = "Publisher Copyright: Copyright {\textcopyright} 2014 by American Solar Energy Society.; 43rd ASES National Solar Conference 2014, SOLAR 2014, Including the 39th National Passive Solar Conference and the 2nd Meeting of Young and Emerging Professionals in Renewable Energy ; Conference date: 06-07-2014 Through 10-07-2014",

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language = "American English",

pages = "495--502",

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Christensen, C, Maguire, J, Burch, J & DiOrio, N 2014, 'Simplified Solar Water Heater Simulation Using on a Multi-Mode Tank Model', Paper presented at 43rd ASES National Solar Conference 2014, SOLAR 2014, Including the 39th National Passive Solar Conference and the 2nd Meeting of Young and Emerging Professionals in Renewable Energy, San Francisco, United States, 6/07/14 - 10/07/14 pp. 495-502.

Simplified Solar Water Heater Simulation Using on a Multi-Mode Tank Model. / Christensen, Craig; Maguire, Jeff; Burch, Jay et al.
2014. 495-502 Paper presented at 43rd ASES National Solar Conference 2014, SOLAR 2014, Including the 39th National Passive Solar Conference and the 2nd Meeting of Young and Emerging Professionals in Renewable Energy, San Francisco, United States.

Research output: Contribution to conference › Paper › peer-review

TY - CONF

T1 - Simplified Solar Water Heater Simulation Using on a Multi-Mode Tank Model

AU - Christensen, Craig

AU - Maguire, Jeff

AU - Burch, Jay

AU - DiOrio, Nick

PY - 2014

Y1 - 2014

N2 - This paper describes a solar water heater (SWH) simulation model that is simpler, faster, and easier to use than typical detailed simulation models using TRNSYS. For the relatively high collector loop flow rates (with multiple tankturnovers per day) which are typical in U.S. active SWHs, the tank model uses a single-node stratified mode during charging. During discharging when the collector loop is off, the model switches to a tank model that is composed of two variable-volume nodes: the lower (cold) node grows with introduced cold inlet water while the upper (hot) node shrinks with output of hot water. Transition from discharging to charging is handled in mode 3 (two variablevolume nodes with solar gains).This type of tank model was used to develop a simple, non-iterative SWH model. Validation against a detailed SWH simulation model using a 100-node tank showed very good agreement.

AB - This paper describes a solar water heater (SWH) simulation model that is simpler, faster, and easier to use than typical detailed simulation models using TRNSYS. For the relatively high collector loop flow rates (with multiple tankturnovers per day) which are typical in U.S. active SWHs, the tank model uses a single-node stratified mode during charging. During discharging when the collector loop is off, the model switches to a tank model that is composed of two variable-volume nodes: the lower (cold) node grows with introduced cold inlet water while the upper (hot) node shrinks with output of hot water. Transition from discharging to charging is handled in mode 3 (two variablevolume nodes with solar gains).This type of tank model was used to develop a simple, non-iterative SWH model. Validation against a detailed SWH simulation model using a 100-node tank showed very good agreement.

KW - dual mode

KW - simulation

KW - solar water heaters

KW - SWH

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M3 - Paper

AN - SCOPUS:84944738014

SP - 495

EP - 502

T2 - 43rd ASES National Solar Conference 2014, SOLAR 2014, Including the 39th National Passive Solar Conference and the 2nd Meeting of Young and Emerging Professionals in Renewable Energy

Y2 - 6 July 2014 through 10 July 2014

ER -

Simplified Solar Water Heater Simulation Using on a Multi-Mode Tank Model

Abstract

Conference

Bibliographical note

NREL Publication Number

Keywords

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