Solar Water Heating Systems

Kalogirou, Soteris A.

doi:10.1016/b978-0-12-374501-9.00005-4

Cited by 48 publications

(86 citation statements)

References 14 publications

(13 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Solar water heating systems are amongst the most cost-effective renewable energy systems for many climates providing an alternative to or supplementing conventional domestic energy systems using fossil fuel. During the summer months, a typical solar hot water system can supply between 80 and 100 per cent of hot water demand [5]. This will be considerably less in winter.…”

Section: Introductionmentioning

confidence: 99%

An experimental investigation of the heat transfer and energy storage characteristics of a compact latent heat thermal energy storage system for domestic hot water applications

Fadl

Eames

2019

Energy

View full text Add to dashboard Cite

This paper presents the experimental performance analysis of a latent heat thermal energy storage system (LHTESS) designed for domestic hot water (DHW) applications. The designed, fabricated and characterised thermal store comprised of a vertically oriented multi-pass tube heat exchanger in a rectangular cross-section container filled with phase change material (PCM) paraffin wax RT44HC. The experimental investigation evaluated the heat transfer within the system, measured the transient temperature distribution, determined the cumulative thermal energy stored, charging and discharging time and the instantaneous charging and discharging power. The experimental work was conducted under controlled experimental conditions using different heat transfer fluid (HTF) inlet temperatures and different volume flow rates for store charging and discharging. It was found that during charging natural convection in the melt played a significant role. During discharging thermal conduction dominates and natural convection has an insignificant impact on the LHTESS performance. This is due to the development of a solid layer of PCM around the heat transfer tubes which increases the thermal resistance and reduces heat transfer to the liquid PCM. Higher HTF inlet temperature during charging significantly decreased store charging time. Increasing HTF inlet temperature from 60 to 70 o C shortened the charging time by 3.5 hours, a further increase to 80 o C decreased melting time by a further 2 hours. This study illustrates the extent to which LHTESS, and heat exchanger designs need to be improved to meet the desired charge/discharge time requirements for most short-term storage applications and that a broad range of domestic and commercial heat demands can be fulfilled by assembling several LHTESS units to operate in parallel.

show abstract

Section: Introductionmentioning

confidence: 99%

An experimental investigation of the heat transfer and energy storage characteristics of a compact latent heat thermal energy storage system for domestic hot water applications

Fadl

Eames

2019

Energy

View full text Add to dashboard Cite

show abstract

“…The maximum temperature reached is below the saturation point and the applications are mainly for heating water in hospitals, hotels, swimming pools or small applications for industry uses, mainly for heating water. When higher temperatures are required the applications of thermal oils for HTF in the PTC is commonly used and the temperature reached are around the 400°C [7]. However, the addition of a heat exchanger is required for steam generation.…”

Section: Ptc and Dsg Generationmentioning

confidence: 99%

A Feasibility Analysis of a Solar Power Plant with Direct Steam Generation System in Sonora, Mexico

Contreras¹,

Saldaña²,

Alejo³

et al. 2023

Preprint

View full text Add to dashboard Cite

Power generation using renewable technologies has become a primordial option to satisfy the energy demand all over the world, being solar concentrating technologies widely applied for this purpose. A combination of Parabolic Trough Collector with Direct Steam Generation has been considered an excellent option for power generation, due to the economic cost and complexity in the plant are reduced. The thermal evaluation of the solar power plant as well as the PTC in the DSG process is very important in viability and economic analysis. In this sense, as the main objective of this work, a numerical tool for evaluating DSG with PTC technology has been developed. The software SOLEEC is a versatile, reliable, accurate and friendly to the user for thermally evaluating a DSG with PTC technology. The user has the possibility to compare the thermal behavior of different geometrical dimensions for a PTC; and even consider different materials; in order to satisfy the demand of superheated steam by a DSG process. The software has an error less than 5% when compared with literature results and in this paper is used to evaluate a power plant in Mexico obtaining that the change to DSG proposing different PTC could reduce the solar field about 35%.

show abstract

“…The transmittance and reflectance of the sintered glass frits at the wavelength of laser radiation were measured with a Shimadzu UV-3600 spectrophotometer, for sintered samples on FTO glass substrates. The absorbance of the two glass frits were then computed from equation ( 6) [69].…”

Section: Absorbance Measurementsmentioning

confidence: 99%

Development of hermetic glass frit encapsulation for perovskite solar cells

Emami

Martins

Madureira

et al. 2018

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

A hermetic laser-assisted glass frit encapsulation, at a process temperature of 120 °C, was developed for perovskite solar cell application. The hermeticity and long-term stability of the sealing was examined based on standard tests for photovoltaic (PV) applications. Encapsulations using fluorine doped tin oxide (FTO)-coated glass substrates displayed 8.93 × 10 −8 atm • cm 3 • s −1 air leak rate after five cycles of a humidity-freeze test according to the IEC61646 standard; a rate lower than the reject limit of the MIL-STD-883 standard test for fine leaks. Devices sealed with a TiO 2 blocking layer and FTO scribing-denoted as an empty perovskite solar cell-showed that the encapsulation is compatible with the various thermal coefficient of expansion regions of perovskite solar cells (PSCs). The applicability of the MIL-STD-883 standard was studied in detail and it was concluded that a new method is required to measure the fine helium leak rate of devices with cavity sizes larger than 5.5 × 5.5 cm 2 . The developed sealing process is scalable for larger devices; therefore, it guarantees a new step forward for the industrialization of PSCs.

show abstract

Solar Water Heating Systems

Cited by 48 publications

References 14 publications

An experimental investigation of the heat transfer and energy storage characteristics of a compact latent heat thermal energy storage system for domestic hot water applications

An experimental investigation of the heat transfer and energy storage characteristics of a compact latent heat thermal energy storage system for domestic hot water applications

A Feasibility Analysis of a Solar Power Plant with Direct Steam Generation System in Sonora, Mexico

Development of hermetic glass frit encapsulation for perovskite solar cells

Contact Info

Product

Resources

About