Mechanical Engineering

The present paper identifies the critical success factors while the implementation of TQM, to evaluate their impact on the primary measures as expressed by the operational performance and the secondary measures as organizational performance, and to find out the effect of the operational and organizational performance of small and medium-sized enterprises (SMEs) in a selected industrial sector using the semi structured interview approach. A total 297 samples are identified for analysis. 139 responses received with all detail. Respondent’s profiles are quality managers and deferent sectors are targeted. A focus is needed on analyzing various techniques and strategies to be adopted by the Indian companies.

The present paper addresses the concept of CSF in the development of new products. More specifically, the aim of this research is to study how performance is perceived and measured within the companies, and how this can be improved. The target respondents are Indian SMEs. 18 critical factors are identified and with the help of semi structured questionnaire the data is collected. The collected data is being analyzed in SPSS software. The results show that the identified factors are related to success of new product in the Indian SMEs.

Transferring heat using conduction and convection requires the presence of a temperature gradient in some form of matter ,while the heat transfer by thermal radiation requires no matter. It is extremely important process, and from physical sense it is perhaps the most interesting form of the heat transfer modes. It is relevant to many industrial heating, cooling, and drying processes, as well as to energy conversion methods that involves fossil fuel combustion and solar radiation. In this paper, our objective is studying the radiation in Circular Finned-tube heat exchanger. Finned-tube heat exchangers are predominantly used in space conditioning systems, as well as other applications requiring heat exchange between two fluids. One important widespread use is in cooling applications. The results show that the heat transfer in the mode of the radiation is just about 2% compared with forced convection , but when there is natural convection in the system the term of radiation is considerable.

Since the inception of industrial revolution, a continuous attempt has been made to recover and minimize the waste heat. In the present research paper review on heat pipe is done. Through heat pipe the hot air is used to pre heat the inlet air of 4 stroke diesel engines. Further, the different performance parameter is calculated for the analyzing the effect of pre heat inlet air in comparison of normal air. Variation of Performance is discussed and salient conclusion is drawn which indicates that, a wide scope is available for further research on heat pipe and especially in the relation of IC engine exhaust heat recovery system to preheat the inlet air.

A compressor is the heart of vapour compressor system. The function of refrigerator compressor, being an integral part of the system, is related to relate to other components. Hence its capacity, life, breakdown, etc. are very much influenced by the performance of other components like condenser, evaporator, throttling device etc. in this present paper the reciprocating compressor is being replaced by a screw compressor. The performance analysis is conducted and further a comparison analysis is done. It has been found that the screw compressor with certain limitation is more effective and saves the power.

The present research is motivated by the changing roles of continuous improvement programs as a result of changes in organizational environments. Focus on the changing demands made on organizational infrastructure for continuous improvement program is under consideration. Visual process control is applied in a financial section of a company. The success of Six Sigma programs depends to a large extent on motivating employees, training them and coordinating their efforts in projects as well as implementing changes resulting from projects. Managers are interviewed (Total 12) and on the basis of score the improvement are analyzed.

The primary goal of TPM (Total Productive Maintenance) programme is to change the culture of the company’s maintenance policy by involvement of all employees toward the maintenance system of the company. The present paper aims to reduce unplanned stoppage, breakdown the accidents and losses obstructing equipment effectiveness. Prior to induce the TPM in the industry a review is being done by researcher and real time Overall equipment effectiveness is measured and shown to management of companies. Real time TPM is being implemented for an effective maintenance of the company and consecutive six month data is collected to see the change. Due to effective maintenance and employee involvement for one purpose has enforced the management for continuous improvement in the company through the systematic implementation of TPM.

Two phase closed thermosyphon are often used in heat exchanger equipments because of their high heat transfer capabilities without external power requirements. In the current study, the heat transfer characteristics of two phase closed thermosyphon is analysed experimentally for various angle of inclinations and heat inputs. To carry out the experiment, two copper thermosyphons of length 1000 mm, inner diameter 17 mm and outer diameter 19 mm are taken and charged with 60 ml of working fluid with an evaporator length of 400 mm and condenser length of 450 mm. One of the thermosyphon is charged with de-ionized water (DI) whereas the other is charged with aqueous solution of n-hexanol. The heat transfer coefficient of thermosyphon filled with aqueous solution of n-hexanol shows a better result when compared to thermosyphon filled with de-ionized water.

Any process involving the process of increasing the efficiency of any mechanical part is a vital concept in the field of engineering and technology and equally vital in the field of energy and power systems too. This paper is based on a technique that could be used to improvise and increase the efficiency of the gas turbine aviation engines which was theoretically stated after conducting series of experiments and analysis through software. This technique could be called as REPOLARIZED MAGNETIC ROTATION technique which converts the magnetic power to mechanical power which could therefore be used to compress air in compressor, and thereby increase the efficiency of the gas turbine engines used in aviation. Various techniques adapted to design, analyze and fabricate the test engine were stated in this paper.

The quality of weld is depicted by weld bead geometry. In submerged arc welding (SAW) bead geometry closely related to the process parameters namely welding current, open circuit voltage, welding speed and nozzle to plate distance. So it is necessary to develop the mathematical models for bead geometry in automatic SAW machine. In the present work mathematical models are developed for bead width and bead hardness by making bead on plate (12 mm thick ASTM SA 516 Grade 60). Experiments were conducted according to the two level half factorial technique and analysis of direct and interactive effect of parameters on responses are presented with the help of Design expert software. Results were clearly illustrated that bead width increases with welding current and voltage, but decreases with welding speed and nozzle to plate distance. Bead hardness increases with Welding current, welding speed and nozzle to plate distance, but decreases with voltage.