Yearly thermal performances of solar heating plants in Denmark – Measured and calculated

Furbo, Simon; Dragsted, Janne; Perers, Bengt; Andersen, Elsa; Bava, Federico; Nielsen, Elsabet

doi:10.1016/j.solener.2017.10.067

Cited by 36 publications

(15 citation statements)

References 7 publications

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“…Instantaneous efficiency (η) is the thermal performance of a collector at a specific time and can be expressed as Equation ( 21) [46,47]. If it is assumed that U L is a constant that does not change with temperature, η can be expressed as Equation (22).…”

Section: Collection Efficiencymentioning

confidence: 99%

Mathematical Modeling and Optimization of Vanadium-Titanium Black Ceramic Solar Collectors

Ding

Liu

2021

Energies

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The vanadium-titanium black ceramic (VTBC) coating on all-ceramic solar collectors has both high absorptance (0.94) and high emissivity (90%). However, the thermal conductivity of ceramic is very low (1.256 W/mK). To improve the heat collection efficiency of VTBC solar collectors, this paper establishes a mathematical model based on the energy-conservation relationships under steady-state conditions and creates a corresponding computer program. Key parameters for VTBC solar collectors include the heat-removal factor, effective transmittance-absorptance product for the absorber, total heat loss coefficient, etc. Then, via experimental testing, this study proposes a reference model for domestic VTBC solar collectors in a cold location (η = 0.89 − 2.20Tm*). Last, this work analyzes the influences of fin design and transparent cover design on VTBC solar collectors individually, using the created computer program. Results show that the most effective optimization method is to increase the transmittance of the transparent cover. By increasing the transmittance from 0.93 to 0.96, this study creates an optimized VTBC solar collector theoretical model (η = 0.92 − 2.20Tm*).

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Section: Collection Efficiencymentioning

confidence: 99%

Mathematical Modeling and Optimization of Vanadium-Titanium Black Ceramic Solar Collectors

Ding

Liu

2021

Energies

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“…Eight plants have seasonal heat storages. Average yearly yields of SDH plants are around 400-500 kWh/m 2 (collector aperture area) [60]. Low heat prices can be achieved by highly standardized system concepts, reliable components, low land cost, favorable financing and existing low temperature DH networks.…”

Section: System Characteristicsmentioning

confidence: 99%

LSEVIER paper: Large Scale Solar Thermal Systems in Leading Countries

Tschoppa¹,

Tianb²,

Berberichc³

et al. 2020

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Large-scale solar thermal systems are a cost-efficient technology to provide renewable heat. The rapid market growth in the last decade has been concentrated on a small number of countries, with the outstanding position of Denmark followed by China, Germany and Austria. This paper provides a comprehensive overview of the market and common technological solutions for large-scale solar thermal systems in these countries.

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“…Furbo et al [62] have summed up the thermal performance of solar district heating plants in Denmark. The average yearly solar heat of the plants is in the range of 400-460 kWh/m 2 .The efficiency of the whole solar heating plants is around 40%.…”

Section: Solar Radiation Analysismentioning

confidence: 99%

Large-scale solar district heating plants in Danish smart thermal grid: Developments and recent trends

Tian

Zhang

Deng

et al. 2019

Energy Conversion and Management

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144

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Large solar collector fields are very popular in district heating system in Denmark, even though the solar radiation source is not favourable at high latitudes compared to many other regions. Business models for large solar heating plants in Denmark has attracted much attention worldwide. Denmark is not only the biggest country in both total installed capacities and numbers of large solar district heating plants, but also is the first and only country with commercial market-driven solar district heating plants. By the end of 2017, more than 1.3 million m 2 solar district heating plants are in operation in Denmark. Furthermore, more than 70 % of the large solar district heating plants worldwide are constructed in Denmark. Based on the case of Denmark, this study reviews the development of large solar district heating plants in Denmark since 2006. Success factors for Danish experiences was summarized and discussed. Novel design concepts of large solar district heating plants are also addressed to clarify the future development trend. Potential integration of large solar district heating plants with other renewable energy technologies are discussed. This paper can provide references to potential countries that want to exploit the market for solar district heating plants. Policymakers can evaluate the advantages and disadvantages of solar district heating systems in the national energy planning level based on the know-how and experiences from Denmark.

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Yearly thermal performances of solar heating plants in Denmark – Measured and calculated

Cited by 36 publications

References 7 publications

Mathematical Modeling and Optimization of Vanadium-Titanium Black Ceramic Solar Collectors

Mathematical Modeling and Optimization of Vanadium-Titanium Black Ceramic Solar Collectors

LSEVIER paper: Large Scale Solar Thermal Systems in Leading Countries

Large-scale solar district heating plants in Danish smart thermal grid: Developments and recent trends

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