Journal ArticleDOI
Heat extraction from salinity-gradient solar ponds using heat pipe heat exchangers
TLDR
In this paper, the authors present the results of experimental and theoretical analysis on the heat extraction process from solar pond by using the heat pipe heat exchanger using R134a was used as the heat transfer fluid in the experiment.About:
This article is published in Solar Energy.The article was published on 2010-09-01. It has received 86 citations till now. The article focuses on the topics: Plate heat exchanger & Thermosiphon.read more
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Electric power generation from solar pond using combined thermosyphon and thermoelectric modules
TL;DR: In this article, the design and test result of the combined system of thermosyphon and thermoelectric modules (TTMs) for the generation of electricity from low grade thermal sources like solar pond is discussed.
Journal ArticleDOI
Evaluation of the thermal performance of a heat pipe using alumina nanofluids
TL;DR: In this article, a straight copper tube with an outer diameter of 9.52mm and different lengths of 0.3m, 0.45m, and 0.6m was used as a heat pipe.
Journal ArticleDOI
Heat utilisation technologies: A critical review of heat pipes
Abstract: In electrical or thermal appliances, heat (thermal energy) must either be added into or removed from a system to maintain operational stability. Heat pipes can enhance the heat transfer capabilities without needing a significant temperature gradient between heat sources and heat sinks. The effectiveness of heat pipes is due to the latent heat of phase change of the working fluid within (i) condensation and (ii) evaporation stages. The latent heat of phase change greatly exceeds the sensible heat capacity. Heat pipes may rely on gravity, wicks, centrifugal force or in some cases even a magnetic field to help return condensate flow from the condenser to the evaporator. Wicks in heat pipes are classified into three groups: sintered, groove and mesh types. This review attempts to cover various types of heat pipes such as thermal diodes, variable conductance, pulsating, etc. The application of nanotechnology in heat pipes can be separated into two groups: nanoparticles and nanobubbles, with the latter receiving considerably less attention than the former. The hybridisation of heat pipe technology is also possible and has been discussed along with its future research potential.
Journal ArticleDOI
Modeling and Optimization of Hybrid Solar Thermoelectric Systems with Thermosyphons
Nenad Miljkovic,Evelyn N. Wang +1 more
TL;DR: In this article, a hybrid solar thermoelectric (HSTE) system is proposed, which uses a thermosyphon to passively transfer heat to a bottoming cycle for various applications.
Journal ArticleDOI
History of the solar ponds: A review study
TL;DR: In this paper, the optimum value of salinity in the mini solar pond is 80 g/kg of water, which is the same as the salinity of the full solar pond.
References
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Journal ArticleDOI
Performance evaluation of solar photovoltaic / thermal systems
TL;DR: In this article, the performance of an integrated photovoltaic and thermal solar system (IPVTS) as compared to a conventional solar water heater and to demonstrate the idea of an IPVTS design is analyzed.
Book
Fundamentals of thermal-fluid sciences
TL;DR: In this article, Bernoulli and Energy Equations of flow structures are used to analyze the acceleration of flow in pipes and flow over bodies: Drag and lift, respectively.
Journal ArticleDOI
Thermal performance of a solar cooker integrated vacuum-tube collector with heat pipes containing different refrigerants
TL;DR: A solar cooking system using vacuum-tube collectors with heat pipes containing a refrigerant as working fluid has been fabricated, and its performance has been analyzed experimentally as discussed by the authors, and experiments were conducted during clear days in July and August of 2002 in Elazig, Turkey under similar meteorological conditions for three refrigerants and water.
Journal ArticleDOI
Performance analysis of a solar-assisted heat pump water heater
TL;DR: In this paper, a simulation of an integral-type solar assisted heat pump water heater (ISAHP) was carried out for one year and the simulation technique was used to analyze the daily performance of an ISAHP for 1 year.
Journal ArticleDOI
Investigation of Heat Transfer Characteristics of a Two-Phase Closed Thermosyphon
TL;DR: In this article, a simple mathematical model is developed to predict the performance of a two-phase closed thermosyphon, where water, ethanol and Freon 113 are used as the working fluids.
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