Question
Download Solution PDFAn electric generator coupled to a windmill produces an average electric power of 6 kW. The power is used to charge a storage battery. Heat transfer from the battery to the surroundings is 0.3 kW. What will
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanation:
Energy Stored in the Battery
- The energy stored in a battery refers to the amount of electrical energy that can be accumulated and retained in the battery over a given period, which is later available for use. This is determined by the net power supplied to the battery and the duration of charging.
To determine the energy stored in the battery, the following steps are performed:
The net power supplied to the battery is the generator's power output minus the heat transfer loss to the surroundings.
Net Power = Generator Power - Heat Loss
Net Power = 6 kW - 0.3 kW = 5.7 kW
Energy stored in the battery can be calculated using the formula:
Energy = Net Power × Time
Here, the net power is 5.7 kW, and the time duration is 2 hours.
Energy = 5.7 × 2 = 11.4 kWh
Since 1 kWh = 3600 kJ, the energy stored in kilojoules is:
Energy = 11.4 × 3600 = 41040 kJ
Last updated on Jul 15, 2025
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