Author
Annamalai Mani
Other affiliations: Indian Institutes of Technology, Presidency University, Kolkata
Bio: Annamalai Mani is an academic researcher from Indian Institute of Technology Madras. The author has contributed to research in topics: Injector & Heat transfer. The author has an hindex of 19, co-authored 62 publications receiving 1096 citations. Previous affiliations of Annamalai Mani include Indian Institutes of Technology & Presidency University, Kolkata.
Papers published on a yearly basis
Papers
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TL;DR: In this paper, a field experiment was conducted during kharif, 2018 and rabi, 2019 under maize crop at the field irrigation laboratory, Department of Soil and Water Engineering, Dr. T. R.
Abstract: ISSN: 2319-7706 Volume 10 Number 01 (2021) Journal homepage: http://www.ijcmas.com Maize crop requires number of macro-nutrients and micro-nutrients for its growth and development. Nitrogen is one of the key nutrients needed for crop production; however, it is the most mobile and volatile and mainly exhausted nutrients due to its ability to exist in unusual forms and its easy leach ability. Lack of knowledge among the maize growers about the consequences of irrational use of water and nitrogen is mainly responsible for low water use efficiency and nitrogen use efficiency at field level. A field experiment was conducted during kharif, 2018 and rabi, 2019 under maize crop at the field irrigation laboratory, Department of Soil and Water Engineering, Dr. N. T. R. College of Agricultural Engineering, Bapatla, Guntur district of Andhra Pradesh State, India. The rainfall received during crop growing period of kharif 2018 was 303.4 mm and 69.1 mm during rabi, 2018-19. The initial soil physical and chemical properties of the experiment site were calculated. The inline drip irrigation system was designed in split pot for the experiment with three irrigation levels (main plots) namely I1= 0.6 of the crop evapotranspiration, I2= 0.8 of the crop evapotranspiration and I3=1.0 of the crop evapotranspiration and four nitrogen levels ( sub plots) namely N1= Drip fertigation with 80% of recommended dose of nitrogen (CF), N2= Drip fertigation with 100% of recommended dose of nitrogen (CF), N3= Drip fertigation with 120% of recommended dose of nitrogen (CF) and N4= No drip fertigation (manual application) with 100% of recommended dose of nitrogen (CF) with three replications. The amount of crop water requirement of maize was estimated with computer software CROPWAT (v 8.0). The dry matter production (DMP) and nitrogen use efficiency (NUF) of maize were estimated for both the seasons. The results shown that during kharif 2018 the highest value of DMP was found in I3 treatment (399.22 kg ha -1 ) followed by I2 and I1 treatments (392.93 and 381.90 kg ha -1 ). During rabi 2018-19, the value of DMP was found in I3 treatment (574.62 kg ha 1 ) followed by I2 and I1 treatments (565.29 and 446.38 kg ha -1 ). The highest NUE of 32.88 kg ha -1 mm -1 was obtained in I2N1 treatment during kharif 2018. During rabi 2018-19, the highest NUE of 32.85 kg ha -1 mm -1 was in I2N2. The lowest NUE of 21.35 and 22.36 kg ha -1 mm -1 was obtained in I1N3 treatment during kharif 2018 and rabi 2018-19. K e y w o r d s Maize crop, Drip fertigation, Dry matter production, Nitrogen use efficiency Accepted: 20 December 2020 Available Online: 10 January 2021 Article Info Int.J.Curr.Microbiol.App.Sci (2021) 10(01): 3212-3222
28 Jun 2019
TL;DR: In this paper, a single crystal of 2,5-dimethylanilinium chloride monohydrate (DACM) was grown using slow evaporation solution growth technique at room temperature with dimensions 27×4×5 mm3.
Abstract: Single crystal of 2,5-dimethylanilinium chloride monohydrate (DACM) was grown using slow evaporation solution growth technique at room temperature with dimensions 27×4×5 mm3. Single crystal X-ray diffraction studies confirmed that DACM crystallizes in monoclinic crystal system with non-centrosymmetric space group of P21. The presence of functional groups for the grown crystals was confirmed using Fourier Transform Infrared (FTIR) spectroscopy. The optical transparency and cut off wavelength of the grown crystal was examined by UV-Visible spectral studies. Thermal stability and melting temperature of the as grown crystal were identified from TG-DTA analysis. The dielectric constant and dielectric loss has been studied as a function of frequency for various temperatures. Photoluminescence excitation studies showed blue emission radiation occurred at 340.61 nm. Microhardness measurements revealed the mechanical strength of grown crystal. Laser damage threshold studies were carried out for the grown crystal. The second harmonic generation behavior of the grown crystals was confirmed by Kurtz–Perry powder technique.
01 Jan 2018
TL;DR: In this article, the authors numerically investigated the effect of oscillation of convergent-divergent nozzle in an ejector using ANSYS Fluent 15.5.
Abstract: Present study numerically investigates the effect of oscillation of convergent-divergent nozzle in an ejector using ANSYS Fluent.15.5. The nozzle domain will oscillate between two points in the ejector at particular frequency and amplitude. The motion of nozzle and movement of the mesh according to the nozzle oscillation is made possible by user-defined functions available in ANSYS Fluent 15.5. Variation of entrainment ratio with time has been studied at different amplitudes and frequency combination and the same is compared with the stationary nozzle. Even though the oscillating nozzle underperforms the conventional one at lower amplitude and frequency, the former one shows a trend of increasing with increasing frequency.
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TL;DR: In this article, the authors discuss the importance of water resources in modern societies and the challenges facing modern societies, while water covers about two thirds of the surface of the earth, while air covers less than one third of it.
397 citations
TL;DR: In this article, to augment evaporation of the still basin water, fins were integrated at the basin of the solar still to accelerate the production rate, and for further increase in exposure area sponges were used.
385 citations
TL;DR: In this paper, a comprehensive literature review on ejector refrigeration systems and working fluids is presented, which deeply analyzes ejector technology and behavior, refrigerant properties and their influence over ejector performance.
Abstract: The increasing need for thermal comfort has led to a rapid increase in the use of cooling systems and, consequently, electricity demand for air-conditioning systems in buildings. Heat-driven ejector refrigeration systems appear to be a promising alternative to the traditional compressor-based refrigeration technologies for energy consumption reduction. This paper presents a comprehensive literature review on ejector refrigeration systems and working fluids. It deeply analyzes ejector technology and behavior, refrigerant properties and their influence over ejector performance and all of the ejector refrigeration technologies, with a focus on past, present and future trends. The review is structured in four parts. In the first part, ejector technology is described. In the second part, a detailed description of the refrigerant properties and their influence over ejector performance is presented. In the third part, a review focused on the main jet refrigeration cycles is proposed, and the ejector refrigeration systems are reported and categorized. Finally, an overview over all ejector technologies, the relationship among the working fluids and the ejector performance, with a focus on past, present and future trends, is presented.
359 citations
TL;DR: A literature review on ejectors and their applications in refrigeration can be found in this article, where a number of studies are grouped and discussed in several topics, i.e. background and theory of ejector and jet refrigeration cycle, performance characteristics, working fluid and improvement of jet refrigerator.
Abstract: This paper provides a literature review on ejectors and their applications in refrigeration. A number of studies are grouped and discussed in several topics, i.e. background and theory of ejector and jet refrigeration cycle, performance characteristics, working fluid and improvement of jet refrigerator. Moreover, other applications of an ejector in other types of refrigeration system are also described.
339 citations
TL;DR: In this article, a new combined power and refrigeration cycle is proposed, which combines the Rankine cycle and the ejector refrigeration cycles, and an exergy analysis is performed to guide the thermodynamic improvement for this cycle.
244 citations