Energy Simulation of Buildings with a Modular Object-Oriented Tool

Damle, Rashmin; Lehmkuhl, O.; Rey, Guillem Colomer; Pérez, Ivette María Rodríguez

doi:10.18086/swc.2011.01.02

Cited by 11 publications

(17 citation statements)

References 13 publications

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“…The implementation of the storage tank methodology has been made within the existing NEST platform [19] which allows the linking between different elements to perform a specific system or configuration. The main advantages of a modular object-oriented methodology are:…”

Section: Modular Object-oriented Methodologymentioning

confidence: 99%

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Modular object-oriented methodology for the resolution of molten salt storage tanks for CSP plants

et al. 2013

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Two-tank molten salt storages are the most widespread thermal energy storage technology within concentrated solar power plants. In spite of this, there are design aspects such as thermal losses control, optimisation of the storage or how these devices scale up with the increase in power capacity of the plant which still should be considered. In this sense, numerical modelling of these systems can be a powerful tool for reducing their cost. The present work aims at modelling molten salt tanks by proposing a parallel modular object-oriented methodology which considers the different elements of the storage (e.g. tank walls, insulation material, tank foundation, molten salt storage media, etc.) as independent systems. Each of these elements can be solved independently and using different levels of modelling (from global to fully three-dimensional models), while at the same time they are to linked each other through their boundary conditions. The mathematical models used, together with some illustrative examples of the application of the proposed methodology, are presented and discussed in detail. Keywords

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Section: Modular Object-oriented Methodologymentioning

confidence: 99%

“…Then, after updating the variables, the algorithm goes to the next time step. For more details about the general algorithm the reader is referred to [19].…”

Section: Modular Object-oriented Methodologymentioning

confidence: 99%

Modular object-oriented methodology for the resolution of molten salt storage tanks for CSP plants

et al. 2013

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“…This work is based on the existing numerical platform (Damle et al, 2011) for the prediction of the thermal performance of buildings and solar systems. The buildings or solar systems are modeled as a collection of basic elements which can individually be solved for given boundary conditions.…”

Section: Numerical Modelmentioning

confidence: 99%

“…Iterations continue until convergence is reached at a given time step and next time step calculation starts as the variables are updated. Details of the numerical platform are explained in (Damle et al, 2011).…”

Section: Numerical Modelmentioning

confidence: 99%

“…The numerical model to address the multi-functional ventilated façade with integrated collector-storage element (Faggembauu et al, 2003) is adapted to the existing numerical platform for the prediction of the thermal performance of buildings and solar systems (Damle et al, 2011). This object-oriented modular platform is intended to permit coupling between low level resolution models and CFD models based on large eddy simulation (LES) models or DNS, so that some critical zones within the façades or buildings can be modeled with more detail than others.…”

Section: Introductionmentioning

confidence: 99%

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Development of a Multi-Functional Ventilated Façade with an Integrated Collector-Storage: Numerical Model and Experimental Facility

Kizildag¹,

Pérez²,

Oliva³

2011

Proceedings of the ISES Solar World Congress 2011

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The paper reports on physical modeling and experimental evaluation of glazed systems. A multi-functional ventilated façade with an integrated collector-storage is developed and mounted on a test cell facility under real weather conditions. The component uses solar radiation to produce solar heated water flow, which in turn can provide space heating or fulfill domestic hot water demands. Different operational modes of the ventilation channel are analyzed in order to improve the thermal performance of the buildings with glazed façades.The existing numerical platform for the prediction of the thermal performance of buildings and solar systems is used to implement a numerical model to address the multi-functional ventilated façade with integrated collector-storage element. The model uses the measured outdoor data as boundary conditions to obtain predictions by means of a general energy balance in the test room and the façade component. The model permits different levels of simulation depending on the desired precision in each element, applying a modular methodology. In this study, the convection heat transfer coefficient within the parallelepiped storage tank is obtained from a direct numerical simulation (DNS) of turbulent natural convection flow of water, while the remaining empirical information is obtained from the literature for similar geometries.

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Thermo-mechanical parametric analysis of packed-bed thermocline energy storage tanks

et al. 2016

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© 2016. This version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/A packed-bed thermocline tank represents a proved cheaper thermal energy storage for concentrated solar power plants compared with the commonly-built two-tank system. However, its implementation has been stopped mainly due to the vessel’s thermal ratcheting concern, which would compromise its structural integrity. In order to have a better understanding of the commercial viability of thermocline approach, regarding energetic effectiveness and structural reliability, a new numerical simulation platform has been developed. The model dynamically solves and couples all the significant components of the subsystem, being able to evaluate its thermal and mechanical response over plant normal operation. The filler material is considered as a cohesionless bulk solid with thermal expansion. For the stresses on the tank wall the general thermoelastic theory is used. First, the numerical model is validated with the Solar One thermocline case, and then a parametric analysis is carried out by settling this storage technology in two real plants with a temperature rise of 100 °C and 275 °C. The numerical results show a better storage performance together with the lowest temperature difference, but both options achieve suitable structural factors of safety with a proper design.Peer ReviewedPostprint (author's final draft

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Energy Simulation of Buildings with a Modular Object-Oriented Tool

Cited by 11 publications

References 13 publications

Modular object-oriented methodology for the resolution of molten salt storage tanks for CSP plants

Modular object-oriented methodology for the resolution of molten salt storage tanks for CSP plants

Development of a Multi-Functional Ventilated Façade with an Integrated Collector-Storage: Numerical Model and Experimental Facility

Thermo-mechanical parametric analysis of packed-bed thermocline energy storage tanks

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