Influence of store dimensions and auxiliary volume configuration on the performance of medium-sized solar combisystems

Lundh, Magdalena; Zass, Katrin; Wilhelms, Claudius; Vajen, Klaus; Jordan, Ulrike

doi:10.1016/j.solener.2010.03.004

Cited by 18 publications

(14 citation statements)

References 10 publications

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“…This work was conducted using the TRNSYS simulation software (a modelling tool de signed to simulate the transient performance of therm al energy systems [40]). The authors concluded th at an internal volume yields higher fractional energy savings (this concept is explained later) for almost any volume and geometry configuration of the internal storage tank compared to external auxiliary volumes [54],…”

Section: R Ecom M En D Ation S For Future W Orkmentioning

confidence: 98%

“…Additionally, evacuated In order to accommodate the additional heating loads as well as minimize mixing inside the tank, an auxiliary volume is occasionally used so th at each tank supplies water for a dedicated purpose. Lundh et al [54] investigated both the geometry and dimensioning of thermal storages, as well as internal and external auxiliary volume configurations for medium-sized solar combisystems and large storage volumes. This work was conducted using the TRNSYS simulation software (a modelling tool de signed to simulate the transient performance of therm al energy systems [40]).…”

Section: R Ecom M En D Ation S For Future W Orkmentioning

confidence: 99%

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Analysis and development of draw strategies for a multi-tank thermal storage system for solar heating applications

Dickinson¹

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A n alysis and D evelop m en t o f D raw S tra teg ies for a M ulti-T ank T herm al Storage S y stem for Solar H eatin g A p p lication sby R yan M . D ickinson, B .E n g ., M echanical E ngin eering C arleton U n iversity A thesis subm itted to the Faculty of G raduate and Postdoctoral Affairs in partial fulfillment of the requirements for the degree of M aster o f A p p lied Science in M echan ical E ngineering

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Section: R Ecom M En D Ation S For Future W Orkmentioning

confidence: 98%

Section: R Ecom M En D Ation S For Future W Orkmentioning

confidence: 99%

Analysis and development of draw strategies for a multi-tank thermal storage system for solar heating applications

Dickinson¹

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“…Their * Corresponding author: clarkejg@vcu.edu fractional solar consumption method determines fractional energy savings from climate data, system loads, and collector orientation regardless of the specific system design. Most recently, Lundh et al investigated the influence of storage volume dimensions on system performance (Lundh et al 2010). This work shows that broad ranges of height to diameter ratio yield very similar solar fractions, indicating that thermal storage is suitable for applications that may include space and sizing restrictions.…”

Section: Introductionmentioning

confidence: 94%

A passive house with seasonal solar energy store:in situdata and numerical modelling

Clarke

Colclough²,

Griffiths³

et al. 2013

International Journal of Ambient Energy

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This paper presents parametric analysis of solar collector area and solar energy storage volume for a passive house in Galway, Ireland. Using the simulation tool Transient System Simulation Tool (TRNSYS), a model was developed to represent a 215 m 2 home built to Passivhaus standards and incorporating a 10.6 m 2 solar thermal collector and a 23 m 3 solar thermal storage tank. This model was validated through comparison with data collected in situ from the operation of the home over the period of 1 year. Once validated, the model was used to investigate the effect of varying solar collector area and solar energy storage volume on the fraction of heat demand met by solar energy. Results indicate that increasing collector area from 10.6 to 20 m 2 could increase total solar fraction from 0.47 to 0.63, decreasing fossil-fuel-derived energy demand at the home under study by a further 30%.

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“…Generating useful solar heat during heating period Generating useful solar heat during summer time and storing it for long periods of time in large storage capacities A wide range of simulation studies does exist, considering supply systems with high fraction of solar thermal energy [6,7,8,9,10,11].…”

Section: State Of the Artmentioning

confidence: 99%

Solar-Active-Houses – Dynamic System Simulations to Analyze Building Concepts with High Fractions of Solar Thermal Energy

Oliva

Stryi-Hipp

Kobelt³

et al. 2015

Energy Procedia

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In the German national research and development project "HeizSolar" the building concept of Solar-Active-Houses is analyzed. The concept allows for a high fraction of solar thermal energy of more than 50% of the total heat supply. Within the project nine existing buildings have been monitored since the beginning of the heating period of 2011. The technology applied for this kind of supply concept has been introduced in [1, 2]. Based on the data obtained from the in-situ monitoring, typical operation conditions have been identified and analyzed in [3]. The measured data was also used to derive parameters to calibrate a dynamic system simulation model for Solar-Active-Houses [4]. The elaborated model focuses on the performance of the solar thermal collector as well as the solar circuit. What is more, the dynamic interaction between the solar thermal heat generator and the auxiliary heating systems as well as the heat distribution system are incorporated in detail. Finally the diffuse heat flux resulting of the integration of large hot water storage tanks into the building envelope is implemented to the model. This model is applied in the following to analyze the general thermal behavior of the supply concept and to derive optimization potentials. In detail the systems performance in regard to different types of heat transferal systems for space heating is demonstrated. Also the dimensioning in regard to the key parameters of collector area and the thermal capacity of the storage system consisting of a hot water storage tank are stated. et al. / Energy Procedia 70 ( 2015 ) 652 -660 653 Nomenclature A ap ST collector aperture area (m²) f sol fraction of ST energy (-) Q AuxH useful heat delivered by the AuxH system (kWh) Q DHW useful heat demand for DHW preparation (kWh) Q loss,use useful heat losses of the hydraulic components like piping and the TES (kWh) Q SH,AuxH useful SH demand covered by ST including a fraction of AuxH (kWh) Q SH,dmd gross SH demand of the building at a constant room temperature of 20°C (kWh) Q SH,solar SH demand covered completely by ST (kWh) q TES relative charging level of TES (-) TES,sim T simulated mean temperature of TES (°C) TES,ref T reference mean temperature of TES (88°C) UA TES overall heat-transfer coefficient of TES (W/K) V TES effective volume of TES (m³)

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Influence of store dimensions and auxiliary volume configuration on the performance of medium-sized solar combisystems

Cited by 18 publications

References 10 publications

Analysis and development of draw strategies for a multi-tank thermal storage system for solar heating applications

Analysis and development of draw strategies for a multi-tank thermal storage system for solar heating applications

A passive house with seasonal solar energy store:in situdata and numerical modelling

Solar-Active-Houses – Dynamic System Simulations to Analyze Building Concepts with High Fractions of Solar Thermal Energy

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