wb4408A

Coursecode: wb4408A Coursename: Diesel engines A DUT creditpoints: 3 ECTS creditpoints: 4,5
Faculty of Mechanical Engineering and Marine Technology
Lecturer(s): Stapersma, prof. D., MSc, FIMarE.	Tel.: +31 15 27 83051
Catalog data: Thermodynamic principles, performance, Seiliger process, air swallow capacity, turbocharging, matching of turbocharger, off-design performance	Courseyear: MSc 1st year Semester: 1A / 1B Hours p/w: 2 Other hours: - Assessment: See remarks Assessm.period(s): 2, 3 (see academic calendar)
Prerequisites: wb1224
Follow up: wb4408B
Detailed description of topics: Performance, introduction - fuel economy and power density - data and general principles of modern diesel engines - important design trends made clear by using the ideal Seiliger process Thermodynamic principles - recapitulation of engineering thermodynamics - formulation of the 1st and 2nd law for general open/closed system -- the polytropic process: heat loss versus irreversibilities - Thermodynamic analysis of the diesel engine - realistic Seiliger process Air swallow capacity - filling efficiency - air swallow capacity of 2- and 4-stroke engines Turbocharging - mechanical charging versus exhaust driven turbocharger - constant pressure versus pulse system - turbocharging, explained in P-V and T-S diagram - principles of interaction between the turbocharger and the engine - off-design performance of a turbocharged diesel engine - "waste gate" and Variable Turbine Geometry (VTG) - on/off switching of parallel groups of turbochargers - two-stage turbocharging Modelling - classification of diesel engine simulation models - physical balances - blockdiagram: engine + turbocharger.
Course material: D. Stapersma, "Diesel engines I: Performance analysis and turbocharging" D. Stapersma, "Diesel engines II: Thermodynamic principles" D. Stapersma, "Diesel engines III: Turbocharging"
References from literature: paper "595 Series - The new MTU diesel engine generation" Bruckner, G.M. Wolters CIMAC conference, Florence 1991 reprint from MTU focus 2/1991
Remarks (specific information about assessment, entry requirements, etc.): Assessment: making some exercise problems concluded by a discussion.
Goals: To acquire some insight in the technical and economical importance of the diesel engine relative to other energy generating installations. Insight into the complexity and interdependency of the main performance parameters of a diesel engine. Acquiring a fundamental insight into the thermodynamic processes in the diesel engine, both in the cylinder and in the turbocharger. Knowledge of the principles of a turbocharger to increase the power density of the engine and as an example of direct waste heat usage. A feeling for the complex interaction between engine and turbocharger at part load.
Computer use: Limited; the course is woven around a computer aided cycle analysis program of the diesel engine process. It also provides a basis for doing advanced simulations. The exercise can be solved either by hand or with the help of a computer.
Laboratory project(s): Measurements on an engine with a turbocharger
Design content: Limited; assessment of the design parameters governing the performance of the engine. No extensive treatment of constructional details of the engine.
Percentage of design: 25%