A 240-V dc generator is powering a chemical process heater that has 20- load resistance and produces

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A 240-V dc generator is powering a chemical process heater that has 20-Ω load resistance and produces 2880-W heat when fully on. A certain operation requires a partial heat of only 2160W on average. Determine:

(1) The required series resistance (rheostat) value and the process energy efficiency and

(2) Switching duty ratio D and the energy efficiency if an ideal power electronics control is employed to reduce the heat.

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Introduction To Electrical Power And Power Electronics

ISBN: 9781466556607

1st Edition

Authors: Mukund R. Patel

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Question Posted: Dec 04, 2023 12:48 AM

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A 240-V dc generator is powering a chemical process heater that has 20- load resistance and produces

Question:

Step by Step Answer:

1 With the rheostat control of power the ratio of the reduced to full powers gives 2160 2880 R L R L R c 20 20 R c which leads to R c 6667 Then the energy efficiency 20 20 6667 075 which means 25 powe...View the full answer

Introduction To Electrical Power And Power Electronics

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