Parabolic trough concentrators for low enthalpy processes

Jaramillo, O.A.; Venegas-Reyes, Eduardo; Aguilar, Javier; Castrejón-García, R.; Sosa-Montemayor, F.

doi:10.1016/j.renene.2013.04.019

Cited by 75 publications

(25 citation statements)

References 11 publications

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“…The research and development of this kind of technology will allow a reduction of the cost of the construction of medium temperature solar collectors. Recent investigations have reported experimental PTC prototypes with a manufacturing cost of $170/m 2 [35] and even $58.5/m 2 [36]. New designs are being studied which reduce the cost of PTC [37].…”

Section: Resultsmentioning

confidence: 99%

Solar Energy for a Solvent Recovery Stage in a Biodiesel Production Process

León¹,

Montero²,

Coronado³

et al. 2016

International Journal of Photoenergy

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Recent research and development of clean energy have become essential due to the global climate change problem, which is caused largely by fossil fuels burning. Therefore, biodiesel, a renewable and ecofriendly biofuel with less environmental impact than diesel, continues expanding worldwide. The process for biodiesel production involves a significant energy demand, specifically in the methanol recovery stage through a flash separator and a distillation column. Traditionally, the energy required for this process is supplied by fossil fuels. It represents an opportunity for the application of renewable energy. Hence, the current study presents a system of thermal energy storage modeled in TRNSYS5 and supported by simulations performed in ASPEN PLUS5. The aim of this research was to supply solar energy for a methanol recovery stage in a biodiesel production process. The results highlighted that it is feasible to meet 91% of the energy demand with an array of 9 parabolic trough collectors. The array obtained from the simulation was 3 in series and 3 in parallel, with a total area of 118.8 m 2 . It represents an energy saving of 70 MWh per year.

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Section: Resultsmentioning

confidence: 99%

Solar Energy for a Solvent Recovery Stage in a Biodiesel Production Process

León¹,

Montero²,

Coronado³

et al. 2016

International Journal of Photoenergy

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“…A fraction of the solar radiation is transferred to a fluid, which flows inside the absorber pipe [15]. The PTC design was based on the works published by Jaramillo et al [39] and Ibarra-Bahena et al [40]. The material and manufacture process considered the Jaramillo's design and were installed at the CIICAp.…”

Section: Parabolic Trough Collector Fieldmentioning

confidence: 99%

Integration of the Experimental Results of a Parabolic Trough Collector (PTC) Solar Plant to an Absorption Air-Conditioning System

et al. 2018

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The present study reports the experimental results of a parabolic trough collector field and an absorption cooling system with a nominal capacity of 5 kW, which operates with the ammonia-lithium nitrate mixture. The parabolic trough collectors’ field consists of 15 collectors that are made of aluminum plate in the reflector surface and cooper in the absorber tube, with a total area of 38.4 m2. The absorption cooling system consists of 5 plate heat exchangers working as the main components. Parametric analyses were carried out to evaluate the performance of both systems under different operating conditions, in independent way. The results showed that the solar collectors’ field can provide up to 6.5 kW of useful heat to the absorption cooling system at temperatures up to 105 °C with thermal efficiencies up to 19.8% and exergy efficiencies up to 14.93, while the cooling system operated at generation temperatures from 85–95 °C and condensation temperatures between 20 and 28 °C, achieving external coefficients of performance up to 0.56, cooling temperatures as low as 6 °C, and exergy efficiencies up to 0.13. The highest value for the solar coefficient of performance reached 0.07.

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“…The second group supplies thermal energy between 85 and 250 • C for applications that requires these temperatures. The typical total length rank aperture widths are 1 to 3, and 2 to 10 m as total lengths [12]. Reddy and Ravi [13] described a solar parabolic trough collector field for power generation based on geometric parameters.…”

Section: Introductionmentioning

confidence: 99%

Hybrid Solar-Geothermal Energy Absorption Air-Conditioning System Operating with NaOH-H2O—Las Tres Vírgenes (Baja California Sur), “La Reforma” Case

Galindo-Luna

Gómez‐Arias

Romero³

et al. 2018

Energies

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Solar and geothermal energies are considered cleaner and more useful energy sources that can be used to avoid the negative environmental impacts caused by burning fossil fuels. Several works have reported airconditioning systems that use solar energy coupled to geothermal renewable energy as a thermal source. In this study, an Absorption AirConditioning System (AACS) used sodium hydroxide-water (NaOH-H 2 O) instead of lithium bromide-water to reduce the cost. Low enthalpy geothermal heat was derived from two shallow wells, 50 and 55 m deep. These wells are of interest due to the thermal recovery (temperature vs. time) of 56.2 • C that was possible at the maximum depth, which can be used for the first stage of the process. These wells were coupled with solar energy as a geothermal energy application for direct uses such as airconditioning systems. We studied the performance of an absorption cooling system operating with a NaOH-H 2 O mixture and using a parabolic trough plant coupled with a low enthalpy geothermal heat system as a hybrid heat source, as an alternative process that can help reduce operating costs and carbon dioxide emissions. The numerical heat transfer results showed the maximum convective heat transfer coefficient, as function of fluid velocity, and maximum temperature for a depth higher than 40 m. The results showed that the highest temperatures occur at low fluid velocities of less than or equal to 5.0 m/s. Under these conditions, reaching temperatures between 51.0 and 56.2 • C in the well was possible, which is required of the geothermal energy for the solar energy process. A water stream was used as the working fluid in the parabolic trough collector field. During the evaluation stage, the average experimental storage tank temperature achieved by the parabolic trough plant was

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Parabolic trough concentrators for low enthalpy processes

Cited by 75 publications

References 11 publications

Solar Energy for a Solvent Recovery Stage in a Biodiesel Production Process

Solar Energy for a Solvent Recovery Stage in a Biodiesel Production Process

Integration of the Experimental Results of a Parabolic Trough Collector (PTC) Solar Plant to an Absorption Air-Conditioning System

Hybrid Solar-Geothermal Energy Absorption Air-Conditioning System Operating with NaOH-H2O—Las Tres Vírgenes (Baja California Sur), “La Reforma” Case

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