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Ravishankar Sathyamurthy

Bio: Ravishankar Sathyamurthy is an academic researcher from Tanta University. The author has contributed to research in topics: Solar still & Diesel fuel. The author has an hindex of 37, co-authored 216 publications receiving 4441 citations. Previous affiliations of Ravishankar Sathyamurthy include S.A. Engineering College & Hindustan University.

Papers published on a yearly basis

Papers
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Journal ArticleDOI
TL;DR: In this paper, the absorber plate of a pyramid basin type solar still is coated with TiO2 nanoparticles doped in black paint on the basin to analyze the performance under the various depth of water.

189 citations

Journal ArticleDOI
TL;DR: In this article, the efficiency of a parabolic trough solar collector (PTSC) was enhanced by using TiO2/DI-H2O (De-Ionized water) nanofluid.

180 citations

Journal ArticleDOI
TL;DR: In this paper, a comprehensive literature on thermophysical properties of nanofluids and the application of solar collector with Nanofluiders have been compiled and reviewed. But, their specific applications in the solar collector are not discussed.

171 citations

Journal ArticleDOI
TL;DR: In this paper, the thermal conductivity of graphene oxide nanoparticle in PCM acts as the key role in improving the thermal performance of a tubular solar still, as compared to that of PCM without nanoparticle.
Abstract: Storing of energy in the form of latent or sensible heat is the best method in improving the performance of any thermal application. Desalination using renewable energy is the best method in getting potable water and due to its lower performance and yield it is not commercially available. The present investigation deals with improving potable water produced using nanomaterial in phase change material from a tubular solar still. Three different solar still namely TSS, TSS with PCM and TSS with NPCM were used in the present study and tested under the climatic conditions of Chennai, India. The thermal conductivity of graphene oxide nanoparticle in PCM acts as the key role in improving the thermal performance as the thermal conductivity of NPCM improved by 52% compared to that of PCM without nanoparticle. There is no significant improvement in the thermal conductivity of nano enhanced PCM with concentration beyond 0.3%. With a significant improvement in the thermal conductivity of NPCM, the water temperature increased by 7 °C and 3 °C as compared to TSS loaded with PCM and TSS without PCM respectively. The maximum enhancement in temperature of NPCM is found as 24% and the temperature is higher during off shine hours compared to that of PCM without nanoparticle. Similarly, with improved water temperature using NPCM as energy material, the evaporation rate from the absorber is improved by 41.3%, whereas, the average EHTC for TSS and TSS loaded with PCM alone is improved by 32.76 and 34.32% respectively. The total cumulative yield produced per m2 area from TSS, TSS with PCM, and TSS with NPCM is found to be 2.59, 3.35 and 5.62 kg respectively. Results also revealed that the daily efficiency of TSS with NPCM is improved to about 116.5% and comparatively higher than TSS with PCM and conventional tubular solar still.

170 citations

Journal ArticleDOI
TL;DR: In this paper, a detailed review of a solar still integrated to solar collectors for augmenting the yield of fresh water is presented, and the yield, economic aspects and payback period of different solar still are reviewed, and a possible conclusion with the integration of low-cost solar water heater and nanofluids in solar Water heater are arrived.
Abstract: Water is one of the important sources for the survival of living species on the earth. As earth having only a small amount of water resources for drinking purpose people in rural and urban areas are getting affected by consuming contaminated water that leads to water-borne diseases. Even ground water has to be properly treated before its use for internal consumption. Salt water contains dissolved and undissolved contents and hence it is not suitable for domestic purpose (cleaning, washing, bathing, etc.). This paper completely deals with the detailed review of a solar still integrated to solar collectors for augmenting the yield of fresh water. However, these methods appear to be uneconomical to the middle and low-income families. The yield, economic aspects and payback period of different solar still are reviewed, and a possible conclusion with the integration of low-cost solar water heater and nanofluids in solar water heater are arrived.

153 citations


Cited by
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Journal ArticleDOI
TL;DR: A detailed overview of the synthesis, properties and applications of nanoparticles exist in different forms NPs are tiny materials having size ranges from 1 to 100nm They can be classified into different classes based on their properties, shapes or sizes.

3,282 citations

01 Jan 2016

1,633 citations

Journal Article
TL;DR: The International Nanofluid Property Benchmark Exercise (INPBE) as discussed by the authors was held in 1998, where the thermal conductivity of identical samples of colloidally stable dispersions of nanoparticles or "nanofluids" was measured by over 30 organizations worldwide, using a variety of experimental approaches, including the transient hot wire method, steady state methods, and optical methods.
Abstract: This article reports on the International Nanofluid Property Benchmark Exercise, or INPBE, in which the thermal conductivity of identical samples of colloidally stable dispersions of nanoparticles or “nanofluids,” was measured by over 30 organizations worldwide, using a variety of experimental approaches, including the transient hot wire method, steady-state methods, and optical methods. The nanofluids tested in the exercise were comprised of aqueous and nonaqueous basefluids, metal and metal oxide particles, near-spherical and elongated particles, at low and high particle concentrations. The data analysis reveals that the data from most organizations lie within a relatively narrow band (±10% or less) about the sample average with only few outliers. The thermal conductivity of the nanofluids was found to increase with particle concentration and aspect ratio, as expected from classical theory. There are (small) systematic differences in the absolute values of the nanofluid thermal conductivity among the various experimental approaches; however, such differences tend to disappear when the data are normalized to the measured thermal conductivity of the basefluid. The effective medium theory developed for dispersed particles by Maxwell in 1881 and recently generalized by Nan et al. [J. Appl. Phys. 81, 6692 (1997)], was found to be in good agreement with the experimental data, suggesting that no anomalous enhancement of thermal conductivity was achieved in the nanofluids tested in this exercise.

881 citations

01 Jan 2016
TL;DR: The principles of enhanced heat transfer is universally compatible with any devices to read and is available in the book collection an online access to it is set as public so you can get it instantly.
Abstract: Thank you very much for reading principles of enhanced heat transfer. As you may know, people have look numerous times for their chosen books like this principles of enhanced heat transfer, but end up in malicious downloads. Rather than reading a good book with a cup of coffee in the afternoon, instead they are facing with some infectious bugs inside their desktop computer. principles of enhanced heat transfer is available in our book collection an online access to it is set as public so you can get it instantly. Our books collection spans in multiple locations, allowing you to get the most less latency time to download any of our books like this one. Merely said, the principles of enhanced heat transfer is universally compatible with any devices to read.

553 citations

Journal ArticleDOI
Kun Du1, John Kaiser Calautit1, Zhonghua Wang1, Yupeng Wu1, Hao Liu1 
TL;DR: In this paper, a state-of-the-art review on phase change materials (PCMs) and their applications for heating, cooling and electricity generation according to their working temperature ranges from (−20°C to +200°C).

381 citations