Universidad Pública de Navarra - Nafarroako Univertsitate Publikoa
Public University of Navarre
| Course code: 501401 | Subject title: HYDRAULICS AND FARM MACHINERY | ||||
| Credits: 6 | Type of subject: Mandatory | Year: 2 | Period: 2º S | ||
| Department: Agricultural Projects and Engineering | |||||
| Lecturers: | |||||
| ARAZURI GARIN, SILVIA [Mentoring ] | GIMENEZ DIAZ, RAFAEL [Mentoring ] | ||||
Contents
- To know fluid properties and to determine forces exerted by the fluid at rest.
- To apply the main equations related to fluid in motion both in pipelines and in open channels.
- To select engines and farm machines using technical, socio-economic, environmental and safety at work criteria.
Descriptors
Properties of fluids: hydrostatics and hydrodinamics. Pumps and pumping systems. Engines, farm machines, safety.
General proficiencies
CT5: Proficiency in working in multidisciplinary and multicultural teams
CT7. Proficiency in solving problems and decision-making
CT8: Proficiency in working by projects
Specific proficiencies
CG2. Sound knowledge of physical problems, technologies, machinery, and water and energetic systems, of the limits imposed by budget and construction regulations, of the relationships between facilities or buildings and agricultural exploitations, agri-food industries and spaces related to gardening and landscaping with their social and environmental surroundings, and of the need to relate all these with human necessities and environmental preservation.
CE15: Proficiency in knowing, understanding and applying Rural Engineering principles: structures calculation and construction, hydraulic, farm engines and machinery, electrical engineering and technical projects.
Methodology
|
Activities |
Attendance |
Self-study |
|
A-1 Lectures/participative classes |
30 |
53 |
|
A-2 Practices |
16 |
12 |
|
A-3 Debates, data sharing, group tutorials |
2 |
2 |
|
A-4 Assignments |
9 |
23 |
|
A-5 Readings |
|
|
|
A-6 Self-study |
|
|
|
A-7 Exams, tests |
3 |
|
|
A-8 Individual tutoring |
|
|
|
Total |
60 |
90 |
Evaluation
|
Proficiency |
Criteria |
Tool |
Percentage weight |
|
CT1 |
Attendance and interaction in the participative classes |
Signature control |
5% |
|
CG2, CE15 |
Identification of key concepts and understanding of theoretical and practical knowledge |
Written test |
50% |
|
G5, G7 |
Practical application of the knowledge. Proficiency in analysing and synthetizing |
Works in group to solve practical problems analysing the obtained results |
30% |
|
CT8 |
Integrating the whole knowledge of the subject |
Short project to solve the formulated problem and analyse the obtained results |
15% |
To pass the subject is necessary to overcome both theoretical and practical parts. Written test, works in group and individual project will be regained.
Agenda
Module: Hydraulics
Unit 1. The hydraulic engineering in a rural framework
Introduction.Engineering, hydraulic engineering. The hydraulic engineering in a rural framework, an overview.
Unit 2. Physical magnitudes. Definition and properties of fluids
Introduction. Magnitudes, dimensions, units and conversion factors. Dimensionless numbers in hydraulics. Fluid, liquid, gas. Density and specific weight. Pressure. Surface forces and mass forces. Viscosity.
Unit 3. Hydrostatics
Introduction. The hydrostatic equation. Forces on immersed surfaces. Devices to measure pressure intensity based on hydrostatics' principles
Unit 4. Fundamentals of fluid in motion
Introduction. Liquid at rest and in motion. Classifying various types of fluid flow: flow through pipelines and flow in open channels; steady and unsteady flow; uniform and non-uniform flow; real and ideal flow; one-dimensional, bidimensional and three-dimensional flow; laminar and turbulent flow; reynolds number.
Unit 5. Main equations for fluid in motion
Introduction.Principles and laws governing the hydraulics. The continuity equation. The energy equation: the Bernoulli equation; energy in a fluid cross-section; energy head line and piezometric head line, flow power.
Unit 6. Flow through pipelines
Introduction. Determination of head loss in pipes: Equations to calculate head loss. Darcy-Weisbach equation; friction factor; minor head loss. Simple pipelines. Characteristic curve of pipelines. Complex pipelines. Parallel and branching pipelines. Fundamentals of ramified network pipelines
Unit 7. Pumps and pumping system
Introduction. Types of pumps. Head generated by a pump. Head- Discharge curve. Cavitation. NPSH curves. Pumps in parallel and pumps in series
Unti 8. Flow in open channels
Introduction. Fundamentals of flow in open channels. Main equations governing the hydraulics of open channels: specific energy and critical depth; the Manning equation. Flow transitions. Hydraulic jump.
Module: Farm machines
Unit 1. Traction and power machines: Tractors and motor cultivators.
Standard ISO 3339-0: 1986. Tractors and machinery for agriculture and forestry -- Classification and terminology -- Part 0: Classification system and classification
Unit 2. Tractor components
Internal combustion engines. Fuels and atmospheric emissions. Power supply system. Wheels. Hitches for the implements. Brakes. Steering.
Unit 3. Transmissions
Clutch. Types and operation. Gearbox. Automatic gearbox. Differential. Differential lock. Final reduction. Types of powered front axles. Front differential. Independent shafts.
Unit 4. Dynamic and energetic balance
Breaking power tests. Characteristic curves. Iso-consumption curves. Drawbar power tests. Energetic balance. Other tractor tests. Tractor static and dynamic study.
Unit 5. Tractor selection technical criteria
Tractor selection technical criteria. Tractor selection economic criteria. Other socio-economic criteria.
Unit 6. Drive and distribution mechanisms of the farm machines
Tractor-implement relationship. Hydraulic, mechanical and electronic drives. Fertiliser distribution units. Seeds distribution units. Distribution elements of sprayers.
Unit 7. Common and generic risks of farm machines
Common risks of farm machines. Generic risks of farm machines. Prevention and protection. Accident rates in the management of farm machinery. Accidents during coupling and uncoupling of the implements. Accidents at the power take-off. Protective structures on the tractors.
Short project
Students must carry out a study that relates both parts of the subject.
Bibliography
Access the bibliography that your professor has requested from the Library.
Hamill, L. 2011. Understanding Hydraulics. Palgrave MacMillan Ed. 3th Edition.
Borgman, D.E. 2008. Tractors. How to operate, maintain, and improve the performance of your tractor. John Deere Ed. 4th Edition.
Hydraulics. The fundamentals of service and theory of operation for hydraulic systems in off-road vehicles, trucks, and buses. 2011. John Deere Ed. 8th Edition.