TU IOE · EE 702

Utilization of Electrical Energy

Chapters
6
Questions
222

Past questions by syllabus

5.

Electric Heating

5.4

Methods of Electric Heating: Resistance Heating, Induction Heating, Electric Arc Heating, Dielectric Heating, Infrared Heating, and Micro-Wave Heating

3 questions
6.

Demand Side Management

6.1

Introduction and Advantages of Demand Side Management

10 questions
6.2

Consumer Classification and their Demand Characteristics

1 question
6.3

Effective Demand Side Management Techniques

5 questions
6.4

Causes and Disadvantages of Low Power Factor and Different Techniques to Improve Power Factor

6 questions
  4. 2081 Baishakh2080 BaishakhChapter 6: Demand Side ManagementCauses and Disadvantages of Low Power Factor and Different Techniques to Improve Power Factor

    An industry consumes 50000 units of electricity in a year at average power factor of 0.7 lag. The recorded max. demand is 400 kVA. The tariff is Rs. 120/kVA plus Rs. 5.50 per kWhr. Calculate the annual cost of supply and find out annual saving in cost by installing power factor improving device costing Rs. 1000 per kVAR which raises the power factor from 0.7 to 0.9 lagging. Allow 10% per year on the cost of the improving device to cover all additional cost.

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