Figure - uploaded by Patricia Cuervo
Content may be subject to copyright.
Source publication
The increasing interest in renewable energy has opened an opportunity to apply this technology in the industry and domestic sector. However, in solar-based systems, limitations associated with the intermittent energy delivery can cause unstable performance and unreliable designs. Weather fluctuations, such as wind speed and appearance of clouds, ar...
Context in source publication
Context 1
... µí±F is calculated using Equation 9 [6] from an energy balance of the drying air. Table 1 show the results of the heat transfer analysis inside and outside the tubes respectively when using a first set of given conditions. Table 2, shows the results of the operation of the heat exchanger. ...Similar publications
Large-scale solar heating for the building sector requires an adequate Thermal Energy Storage (TES) strategy. TES plays the role of load shifting between the energy demand and the solar irradiance and thus makes the annual production optimal. In this study, we report a simplified algorithm uniquely based on energy flux, to evaluate the role of acti...
![Long‐ term cycling of [Pzy][CH3SO3]. The black curve represents the...](profile/Surianarayanan-Mahadevan/publication/336849051/figure/fig2/AS:11431281244366786@1715893288844/Long-term-cycling-of-PzyCH3SO3-The-black-curve-represents-the-first-DTA-cycle-and_Q320.jpg)
![Crystal structure and Hirshfeld surface analysis of [Pzy][CH3SO3]....](profile/Surianarayanan-Mahadevan/publication/336849051/figure/fig3/AS:11431281244366787@1715893289048/Crystal-structure-and-Hirshfeld-surface-analysis-of-PzyCH3SO3-Atwo-ion-pairs_Q320.jpg)
Thermal energy storage technology utilizing phase‐change materials (PCMs) can be a promising solution for the intermittency of renewable energy sources. This work describes a novel family of PCMs based on the pyrazolium cation, that operate in the 100–200 °C temperature range, offering safe, inexpensive capacity and low supercooling. Thermal stabil...
Solar-thermal technology based on phase change materials (PCMs) has received a lot of attention as a cost-effective and practical way to overcome solar energy intermittency. However, weak photothermal conversion ability and complex preparation processes have hindered the practical application of PCMs. In this work, a new approach for facile, unifor...
Thermal energy storage technology can effectively promote the clean heating policy in northern China. Therefore, phase-change heat storage heating technology has been widely studied, both theoretically and experimentally, but there is still a lack of engineering application research. According to the characteristics of heating load in northern rura...
The properties of polyethylene glycol-6000 (PEG)/MgCaCO3, a low-cost shape-selective phase change material (ss-PCM), make it highly suitable for solar thermal applications. Nanosized porous MgO-doped CaCO3 with Mg molar concentrations of 5%, 10%, and 15% were synthesized using a hydrothermal technique. The prepared MgO-CaCO3 matrices were then impr...
Citations
... Average dimensionless melting time: Here, _ Q real < _ Q max and it means that resizing occurs. To reach the desired value, we can increase the NTU and also the effectiveness by following steps (Escobar-Ochoa et al., 2018): ...
Fresh water is one of the basic needs in daily life where the sources are shrinking due to pollution and climate change. Sea water desalination system is one of the potential solutions that can minimize the scarcity of fresh water. Solar energy is one of the promising renewable energies that can be used for water desalination system. The concepts of solar water desalination system, energy conversion from solar irradiation to thermal energy, and different types of solar thermal collectors are the leading technologies. Solar water desalination is also natural, abundant, environment-friendly than the conventional processes. This chapter describes the different types of solar water desalination system, geometrical shapes, modeling of different types of desalination processes, solar thermal processes, thermal collectors, energy conversion, and performance analysis.
Se ha realizado la climatización de un prototipo “domo experimental”, en zonas de friaje y heladas para gran altitud con el fin de albergar turistas con confort térmico y/o atención de damnificados por desastre naturales, en el cual se ha diseñado todas las componentes del sistema de calefacción, que permitió analizar el comportamiento del aislamiento térmico y los materiales y equipos utilizados. Los resultados del pilotaje se obtuvieron durante tres meses de friaje: mayo, junio y julio del año 2015, cuya investigación realizada es aplicada semi empírico y explicativo de tipo correlacional, para lo cual se realizó el balance de cargas térmicas, determinándose los modelos matemáticos, mediante regresión lineal múltiple, y diseño factorial rotacional 23, lo que permitió determinar los valores óptimos de temperatura (Ti) y humedad relativa (HRi) en el interior del domo, en función de la variación dinámica en el tiempo de los parámetros ambientales y de diseño. Los resultados de las mejoras del prototipo experimental se usaron para realizar el diseño final del “Domo Comercial”. Para el presente proyecto se evaluó su viabilidad técnica económica que permitió determinar su rentabilidad aplicando el método Payback, cuya recuperación de capital del PCM fue de tres años y medio; se evaluó también el ahorro energético y la reducción del impacto ambiental. Finalmente se buscó en el proyecto financiado por el FENCYT mediante la empresa “Domos Perú” que los domos deben tener un rápido armado y desarme en paquetes livianos para su utilización.
In the current scenario of enormous demand for energy, reliance on fossil fuels alone is definitely causing future crises, particularly for developing countries. Although renewable energy options, such as solar energy, are used on a large scale, there are questions about the economy and the social acceptability of these options. If we want to reduce our dependence on fossil fuels and also to mitigate greenhouse gas emissions, the roles of solar thermal energy storage systems are critical. In industrial and domestic applications, various types of solar thermal storage are used. For the implementation of this technology, analysis of design and observation of efficiency of a solar thermal storage is very critical. The materials used here may have various thermal properties, but the limitations of different materials must be understood. Sometimes, numerical analysis is useful in selecting materials and building a solar thermal storage system.
This work presents a systematic review of the literature based on bibliometric networks structured with the VOSviewer application, which was run on different scientific databases, seeking for improvements of drying processes of food and other biomasses in rural contexts. Analyzed data reveals a growing interest on topics dealing with storage of solar thermal energy and mathematical modelling to predict properties of air, as a drying fluid in solar and hybrid dryers. Solar-biomass hybrid drying technologies that use residual heat are currently being applied. At the level of mathematical models, the literature analysis cover heat transfer mechanisms related to changes in absolute and relative humidity of the air and food biomasses. Therefore, a promissory horizon to develop a continuous dryer for cocoa beans, enabling an improvement of the final quality of dried biomass and reducing operation periods for this process in low-economy countries has been elucidated through this review.
Large-scale greenhouse solar dryers have been used for drying various products and this type of dryer is usually equipped with LPG burner as auxiliary heater, which creates more operating cost. To overcome this problem, phase change material (PCM) thermal storage was proposed to substitute for the LPG burner. In this work, the performance of a large-scale greenhouse solar dryer integrated with a PCM as a latent heat storage for drying of chili was investigated. Experimental studies were conducted to compare the performance of this dryer with that of another large-scale greenhouse solar dryer without the PCM thermal storage and open sun drying. Chili with an initial moisture content of 74.7% (w.b.) was dried to a final moisture content of 10.0% (w.b.) in 2.5 days, 3.5 days, and 11 days using the solar dryer integrated with the PCM thermal storage, the solar dryer without the PCM thermal storage and the open sun drying, respectively. The performance of the solar dryer integrated with the PCM thermal storage was also evaluated using exergy analysis. The exergy efficiency of the drying room of the solar dryer integrated with the PCM thermal storage and the solar dryer without the PCM thermal storage for drying of chili was found to be 13.1% and 11.4%, respectively and the thermal storage helps to dry chili during adverse weather conditions. The results of exergy analysis implied that the exergy losses from the dryer with the PCM should be reduced.
