ME 471 — Machine Tools Design

BSc BSc Mechanical Engineering · Kwame Nkrumah University of Science and Technology

Objectives The objective for this course is let students: Understand the working principles of Ref. & AC processes. Identify practical Refrigeration and Air Conditioning plants, plant accessories and roles in the system. Carry out basic design of Ref. & AC systems for specific application, carry out load estimation, size and select plant components. Develop understanding of the principles and practice of thermal comfort. Demonstrate an understanding thermal comfort conditions with respect to temperature and humidity and human clothing and activities and its impact on human comfort, productivity, and health. Develop understanding of the principles and practice and requirements of ventilation. Demonstrate an understanding of psychrometrics and its application in HVAC engineering and design and will practice or observe psychrometric measurements. Demonstrate an understanding of heat transfer in buildings with a given architectural design and its application to heating and cooling load estimation especially including thermal lag effects by conducting a detailed annual load analysis for a representative building and present the results of this analysis in a formal report possibly including recommendations for energy conservation. Demonstrate an understanding of the engineering and operation of vapor compression and possibly heat-driven refrigeration systems and evaporative cooling systems and understand contemporary issues of ozone depletion and global warming potential with respect to refrigeration systems. Demonstrate an understanding of fluid mechanics in building air or coolant distribution systems and in room air distribution and its application to efficient piping and duct systems and effective room air distribution systems and associated flow machines and control systems. Demonstrate a working understanding of energy prediction methods and energy related codes and standards and understand contemporary issues of energy conservation and global warming potential with respect to HVAC systems. Content Fundamentals of air conditioning and refrigeration. Practical refrigeration cycles, water refrigerators, absorption refrigerators, gas refrigeration cycles, fundamentals properties of air and water vapour mixtures. Psychrometric chart and processes. Simple air conditioning systems. Air conditioning and refrigeration design project. Mode of Delivery The mode of delivery of this course will be blended i.e., in person and online Reading Materials Prof. S. A. Anderson: “Automatic Refrigeration”, Maclaren & Sons Ltd., 1959. Dossat: “Principles of Refrigeration”. American Society of Heating and Refrigeration and Air-Conditioning Engineers (ASHRAE), “Handbook 1981-Fundamentals and 1984-Equipment”. W. P. Jones: “Air Conditioning Engineering”, Arnold, 1994 “Faber & Kell’s Heating and Air-Conditioning of Buildings” seventh edition revised by P. L. Martin & D. R. Oughton, Butterworths & Co. (Publishers) Ltd, 1989 McQuiston, Parker and Spitler, Heating Ventilating, and Air Conditioning: Analysis and Design, 4th Ed., John Wiley & Sons, Inc., 1994. J. F. Kreider and A. Rabl, Heating and Cooling of Buildings: Design for Efficiency, McGraw-Hill, 1994.

Credits

3

Level

Year Four

Semester

Semester One

Course details from DETAILED COURSE OUTLINE FOR BSC MECHANICAL ENGINEERING - Department of Mechanical Engineering.