wb4408A

Coursecode: wb4408A Coursename: Diesel engines A ECTS creditpoints: 4
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 Language: English on request Semester: 1A / 1B Hours p/w: 2 Other hours: - Assessment: See remarks Assessm.period(s): 1B, 2A (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 of engine + turbocharger.
Course material: D. Stapersma, "Diesel engines I: Performance analysis and turbocharging" D. Stapersma, "Diesel engines annex thermodynamic & chemical principles" D. Stapersma, "Diesel engines II: Turbocharging"
References from literature:
Remarks (specific information about assessment, entry requirements, etc.): Assessment: exercise problems concluded by a discussion.
Goals: To acquire 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%