Detail kurzu

Introduction to Cooling Airflow Systems Web Seminar RePlay

EDU Trainings s.r.o.

Popis kurzu

Vehicle functional requirements, diesel emission regulations, and subsystem thermal limits all have a direct impact on the design of a powertrain cooling airflow system. Severe duty cycles, minimal ram air, fouling, and sometimes unconventional package layouts present unique challenges to the designer. This course introduces many airflow integration issues and vehicle-level trade-offs that effect system performance and drive the design.
The goal of this course is to introduce engineers and managers to the basic principles of diesel cooling airflow systems for commercial and off-road vehicles. Participants will learn about vehicle/product constraints, integration issues, cooling airflow, system resistance, fans, shrouds, radiators, coolers, estimating heat rejection, thermal recirculation, and overall system performance. Basic concepts will be reinforced with examples and a cooling performance calculation of a diesel cooling system.
Objectives
By participating in this course, you\’ll be able to:

Define vehicle requirements and many cooling airflow system integration issues
Describe heat exchanger sizing considerations, design alternatives, and thermal effectiveness
List fan/shroud aerodynamic design parameters, guidelines, and installation effects
Apply the fan laws to evaluate alternative designs
Calculate fan operating point and airflow using component pressure-loss coefficients
Estimate engine heat rejection to coolant, including Exhaust Gas Recirculation (EGR)
Calculate steady-state thermal performance of a diesel cooling airflow system

Obsah kurzu

Session 1: Vehicle Perspective

Overview Typical Cooling Airflow Systems
Design Drivers
A Classification of Vehicle Cooling Systems
Industrial Air-cooled Heat Exchanger Assemblies
Impact of System & Sub-system Requirements
Thermal Recirculation
Design Challenges

Session 2: Key Concepts – System Heat Transfer Equation and Pressure Losses

1st Law of Aerodynamics
Radiator Heat Transfer Equation
Definition of Standard Air
Airflow Terminology and Standard Cubic Feet per Minute (SCFM)
Bernoulli’s Equation and Ram Pressure
Pressure Loss Coefficient
Vehicle Air Flow Restrictions – Flow Energy Losses
Construct a System Pressure Loss Curve

Session 3: Fan Airflow

Fan Classification and Specific Speed
Fan Characteristic Curve and System Matching
Air Performance Test Chambers (AMCA)
Axial Fan Systems, Pusher and Puller
Exercise the Fan Laws to Evaluate Design Alternatives
Shroud Design Considerations
Vehicle Installation Effects – Fan Position, Tip Clearance, Radiator Proximity

Session 4: Fan and Ram Airflow Map

Ram Airflow
Flow Energy Balance Equation
Fan Operation with Ram
Ram Total-Pressure Recovery
Calculate System Loss Curve, Fan Operating Point and Cooling Airflow

Session 5: Compact Heat Exchangers

Thermal Classification of Heat Exchangers
Compact Heat Exchangers in Vehicle Applications
Radiator Effectiveness and Louvered Fins
Charge Air Coolers, Performance Calculation Against Requirements
Air-Side Fouling Study and Heat Exchanger Design Considerations
Thermal Accumulation Calculation

Session 6: Estimating Powertrain Heat Rejection

SAE Dynamometer Gross Power Test Procedures
Dynamometer Data on Engine Heat Rejection
Brake Mean Effective Pressure (BMEP), A Power Density
Specific Heat Rejection (SHR) Characteristic Curve
EGR Heat Rejection to Coolant
Evaluation of Diesel Cooling System
Tools and Methods for System Development

Materials Provided

90 days of online single-user access (from date of purchase)
12 hours of instructor-delivered content
Course workbook (downloadable, .pdf\’s)
Online learning assessment
Instructor follow up to your content questions
1.2 CEUs* (upon completion of all course modules and satisfactory assessment score)

*SAE International is authorized by IACET to offer CEUs for this course.
Certifikát Na dotaz.
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