FACULTY PROFILE
| Dr. RAJEN KUMAR NAYAK : ASSISTANT PROFESSOR |
Ph.D (Mechanical), M.Tech in Mech (Specialization: Production), B.Sc Engg. (Mechanical)
Department of Mechanical Engineering
Dhanbad (Jharkhand) - 828 123
Mobile no: +91 - 9939709574
E-mail address: [email protected], [email protected]
Educational Qualifications:
Degree: Ph.D
Year: 2017
University: IIT (ISM), Dhanbad
Specialization:Heat Transfer in Mechanical
Thesis Title:“Experimental studyoftheeffectofflowandgeometricalparameterson the performanceof Jet Plate Solar Air Heater”.
Guide: Dr.SN Singh, IIT (ISM), Dhanbad
ABSTRACT OF MY Ph.D THESIS:
This experimental analysis has been carried out in a novel experimental set up known as jetplate solar air heater having a jet plate inserting between bottom plate and absorber plate ofa flat plate solar air heater which may be an excellent option to enhance the performance ofthe solar air heater. The present work deals with the experimental study of geometrical effects of channelspacings and jet hole diameter on the performance of a cross - flow staggered hole jet platesolar air heater. The investigation is carried out with variable mass flow rate of air in thechannels, Reynolds number, depth ratio Z2/Z1, jet hole diameter and number of jet holes incross and non - cross flow inline and staggered hole jet plate solar air heater. In the presentinvestigation, experimental analysis is also carried out in a jet plate with longitudinal finssolar air heater for which ṁ1 = 0.020 - 0.070 kg/sec, ṁ2 = 0.018 - 0.041 kg/sec, Reynoldsnumber, Reja2 = 2000 - 8000, jet hole diameter, D = 6 mm, number of jet hole, N = 561,total air depth, Z = 14 cm, pitch of the fins, p = 5 cm, total number of fins, Nf= 20, heightof fins, Lf = 12 mm, thickness of fins, δf = 3 mm and tilt angle, θ = 22.6o.The experiment isperformed during the winter season at I.I.T(ISM) Dhanbad, India between 9.00 AM to 3.00PM on hourly basis with help of precision instruments, namely, digital hot wireanemometer (DHWA) and digital milli volt meter (DMVM) for recording the velocity,temperature and intensity of radiation.Kline and Klintock method has been used for finding the uncertainty of measurableparameters. The performance in terms of outlet temperature, collector efficiency and Nusselt number ofthis solar air heater are found substantially higher at higher spacing and lower jet holediameter while mass flow rate adversely affects the outlet temperature.
In the present study, the jet plate solar air heater is also compared with conventionalparallel plate solar air heater and it is observed that the performance of the jet plate solar airheater is always higher than conventional solar air heater.The present investigation shows that the cross - flow inline hole jet plate with longitudinal fins is more efficient than cross and non - cross flow inline and staggered hole jet platesolar air heater. Based on the experimental data, the correlations for Nusselt number andfriction factor and effectiveness have been developed.A total four problems have been solved - first problem pertaining to cross - flow staggeredhole jet plate solar air heater for variable channel depth, second problem involving to crossflow staggered hole jet plate solar air heater for variable jet hole diameter, third probleminvolving to cross and non-cross flow inline hole jet plate at fixed jet hole diameter andchannel depth and the last problem pertaining to cross - flow with and without longitudinalfins and non - cross flow inline hole jet plate solar air heater. The main conclusion from thisparticular study is that the higher upper channel depth, smaller jet hole diameter andabsorber plate with longitudinal fins significantly affect on the thermal performance of jetplate solar air heater.
Degree:M.Tech in Mechanical
Year:2010
University:BIT Sindri, Vinobabhave University, Hazaribag.
Specialization:Production Engg.
Thesis title: Work on variation of voltage and current density on material removal rate in electrochemical machining.
Guide: Dr. Manoj Kumar, BIT Sindri, Dhanbad
Degree:B.Sc Engineering in Mechanical
Year:1995
University:B.I.T Sindri, Vinobabhave University, Hazaribag.
Specialization: Mechanical Engineering
Project:on Automobile (Suspension System)
Degree: Intermediate of Science (Mathematics)
University:Science College, Patna (Patna University)
Year: 1991
Degree: Matriculation
School: Don Bosco H/S, Ranchi
Year: 1989
Professional Experience: Sept, 2006 – Feb, 2019 (till date): Assistant Professor at BIT Sindri.
Areas of expertise:
· Heat Transfer
· Solar Energy
· Thermodynamics
· Internal Combustion Engines
· Engineering Drawing & Graphics
· Manufacturing Engineering.
Research Interests:
· Solar Energy
· Electro Chemical Machining
· AC and Refrigeration System
Different courses taught at BIT Sindri, Dhanbad:
· Engineering Mechanics
· Engineering Drawing
· Internal Combustion Engines and Gas Turbine
· Engineering Thermodynamics
· Industrial Management
· Kinematics of Machine
M. Tech theses guidance:
Academic Staff College Orientation / Refresher Course attended during last 10 years:
|
Sl. |
Name of the Course/ Summer School |
Place |
Duration |
Sponsoring agency
|
|
i. |
Developing Personal & Professional Effectiveness |
XLRI, Jamshedpur, Jharkhand |
Two Weeks 16th - 24th Dec, 2006 |
B.I.T Sindri, Dhanbad |
|
ii. |
Pedagogy II |
B.I.T., Sindri, Dhanbad |
One Week 14th - 19th Oct, 2008 |
B.I.T, Sindri under TEQIP |
|
iii. |
Harnessing Renewable Energy: “State of the– art” |
National Institute of Technical (NIT), Patna |
Two Weeks 16th - 29th June, 2008 |
N.I.T, Patna |
|
iv. |
Teaching Computer Graphics |
Indian Institute of Technology, Delhi |
Two Weeks 14th - 25th June, 2010. |
I. I.T, Delhi |
|
v. |
Mission 10X Workshop (High Impact Teaching Skills) |
BIT Mesra, Ranchi |
One Week 22th to 26th Nov, 2010 |
BIT Mesra, Ranchi |
|
vi. |
Machining with CNC Turning Centre |
NITTTR Kolkata |
One Week 2nd - 7th Jun ,2012 |
NITTTR, Kolkata |
|
vii. |
Performance enhancement Skills |
BIT Sindri |
Two Week 23rd Jul – 03rd Aug, 2012 |
ISTE , BIT Sindri |
Important Publications in International Journals since 2015:
[1] R.K Nayak, Singh, S.N, 2015 ‘Experimental Investigation of Flow and Heat Transfer in Cross and Non–Cross Flow Inline Hole Jet Plate Solar Air Heater’, International Journal of Power and Renewable Energy Systems (IJPRES) Volume 2 Issue 1.
[2] R.K Nayak, Singh, S.N, 2016 ‘Effect of geometrical aspects on the performance of jet plate solar air heater’, Solar Energy 137(2016) 434-440 [Elsevier (SCI)]
[3] Mukesh Kumar Yadav, R. K. Nayak, Manoj Kumar, 2017, “Geometrical and operational parameters effect on inline hole jet plate solar Air heater with longitudinal fins for cross and non-cross flow conditions”, International Journal of Emerging Trends In Science & Technology (IJETST),Volume 04 Issue 08.
[4] Birendra Kumar*, R K Nayak and S.N. Singh, 2018, “Experimental Analysis of the Thermo-Hydraulic Performance on a Cylindrical Parabolic Concentrating Solar Water Heater with Twisted Tape Inserts in an Absorber Tube, “ DE GRUYTER, Volume 73, Issue 5, https://doi.org/10.1515/zna-2018-0023[ESCI]
[5] Swaroop K Mandal, Samarjeet Kumar, P K Singh, S K Mishra, H Bishwakarma, N P Choudhry, R. K Nayak, A K Das, 2018“ Performance investigation of CuO-Paraffin Wax nano composite in Solar water heater during Night ” Thermochimica Acta(Elsevier), 671,36 – 42.
National / International Conference Proceedings:
1. Rajen K Nayak and S. N. Singh, 2014 “Analytical study of flow and heat transfer in cross and non – cross flow jet plate solar air heater” Proceedings of 10thHEFAT International Conference held at Orlando Florida, during 14 – 26 July, pp. 2399 – 2405.
2 Rajen K Nayak and S. N. Singh, 2013 “Performance Studies on Jet Plate Solar Air Heater” Proceedings of 11thISHMT-ASME Conference held at IIT Kharagpur, during 27- 30 Dec, 2013.
Copyright © 2017 B.I.T. Sindri, Dhanbad, Jharkhand, India