POWER AND PROPULSION
−− Thermal recirculation −− Challenges • Thermodynamics Review −− First law −− Radiator heat transfer equation −− Bernoulli’s equation −− SCFM • Key Concepts −− Thermal road map −− Fan airflow map −− Flow energy balance equation • Fan Airflow (and system airflow road map) −− Fan classification −− Specific speed −− Fan characteristic curve and matching −− Fan static pressure −− Air performance test chamber (AMCA) −− Pusher and puller fans
Introduction to Cooling Airflow Systems Web Seminar RePlay 12 Hours | On Demand Course I.D.# PD331240ON 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. Learning Objectives By participating in this course, you will 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 Who Should Attend OEM and supplier engineers and managers who are involved with vehicle cooling systems, or who interface with vehicle program management on these issues, will benefit from this web seminar. Graduate-level students interested in cooling systems will also find it instructive. Prerequisites Participants should have an undergraduate engineering degree. Exposure to thermal product development is helpful, but not required.
DAY TWO • Fan Airflow (and system airflow road map) cont’d −− Vehicle installation effects-fan position, tip clearance, obstructions, installed performarmance −− Fan laws −− System airflow road map −− Basic principles of mechanical fan systems • Vehicle Airflow Restrictions-Energy Losses −− Loss mechanisms-expansion and contraction loss, grilles, heat exchangers and underhood −− Front-end and underhood flow patterns −− Ram pressure recovery −− Locating fan operating point • Compact Heat Exchangers (and system heat transfer equation) −− Thermal classification −− Compact heat exchangers −− Calorimeters −− Radiator effectiveness and pressure drop −− Fouling considerations, air-side −− Thermal accumulation • Estimating Powertrain Heat Rejection −− Heat rejection to coolant — Mean effective pressure; SAE dynamometer test procedures −− Specific Heat Rejection (SHR) characteristic curve −− Vehicle installation considerations • Diesel Cooling Airflow System - Case Studies and Exercises • Underhood Airflow −− Thermal considerations, airflow pattern, and air temperature distribution −− Flow visualization video (using water)
Instructor: Fee: $1415
Jack Williams
1.3 CEUs
URL:
sae.org/learn/content/c0738/
218
3 ways to get a no-obligation price quote to deliver a course to your company: Call SAE Corporate Learning at +1.724.772.8529 | Fill out the online quote request at sae.org/corplearning | Email us at corplearn@sae.org
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