Bøger af Asif Ahmad

IIn industry today, the need for excellent product development and realization in many different aspects is increasing. This calls for excellent quality, while at the same time time-to-market is increasingly important. A concurrent engineering (CE) approach is directed towards simultaneously developing different aspects of product realization in order to enhance both quality and speed. This thesis deals with the internal materials supply system (MSS) from a CE approach. Logistics aspects are often not dealt with until later stages of development, which leads to limitations in the possible solutions for the MSS. While designing a new production system, including MSS aspects early on in the project implies stating at an early stage what is required by the system. In order to aid the development of such requirements, this thesis aims at suggesting a structure for the requirements on the MSS where the relevant stakeholders of the system are involved. The thesis results are achieved through literature reviews and a case study at a manufacturing company in the automotive industry.

With the advent of the household refrigeration system in 1910, the modification to the core technology has been very less. The system has a compression machine designed for continuous automatic operation and for the conservation of the charges of refrigerant and oil and is usually motor driven and air-cooled. The compressor used is a power consuming component. It consumes around 90% of the total rated consumption in a refrigerator. This project emphasizes the working of a refrigeration system which does not have a compressor. The refrigerator has no rotary power consuming component, so the system has greater life longevity. The working is based on Peltier cooling comprising of a Peltier module. This is an energy efficient system consuming minimum power. Further, it also acts as a heater unit providing a localized heating. It is an air-cooled system having no flow of refrigerant. This further reduces the environmental concerns surrounding the use of a refrigerant, which has been part of great debate nowadays.