Page 1 of 3 Heat Transfer Assignment This assignment consists of 2 different elements. In the first part you need to select or design a heat exchanger for a waste heat recovery system in cars. The second part is a reflective journal about the unit, a bit similar to the SETU questionnaire but mandatory to capture the thoughts of all students. The assignment needs to be submitted through CloudDeakin as a MS Word or pdf file. Part 1 – Heat Exchanger selection/design Imagine you are part of a product development team that is developing a novel waste heat recovery system to make cars more efficient. One feature of the system is to transfers wasted exhaust heat to the engine oil via a heat exchanger to reduce the friction of the oil, particularly during warm up, but also during steady state operation at engine loads below wide open throttle. Your task is to either design or select and source an existing heat exchanger that will be suitable for this application. Even though most driving patterns in a car are highly dynamic you are given most operating conditions as average over the legal fuel consumption drive cycle. In the assignment you need to justify the decisions based on you engineering judgement and by applying the concepts you learned in the heat transfer unit. The priorities for the new product are as follows: 1. Safe operation under all possible operating conditions at ambient temperatures between -30 °C and +50 °C 2. Maximum efficiency of the heat exchanger to be able to realise the highest possible fuel economy improvement 3. Durability of 150,000km (legal requirement for emission relevant components) 4. Low weight to minimise the negative impact of additional weight towards fuel economy 5. Small external volume to make it easy to package it in the packed and tight engine compartment 6. Low cost 7. Low external temperatures to avoid deterioration, aging or long term damage of nearby plastic components 8. Long term resistance against fouling
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