Renewable Energy Systems (a) During the winter heating season of 180 days an office is heated continuously for 10 hours a dayby a 3kW electric heater. Assuming the heater is only used during the heating season determine howmany gigajoules and kilowatt hours are consumed by the heater annually. (b) Calculate the available power for two hydro schemes. One of the scheme has a flow rate of 3.4litres/second. And the other is a large river with a flow of 100 m3/ second. Both have an effective headwhich is 80% of the actual head. The actual head is 125m for each. And the plant efficiency is 83% foreach 3 - (a) During the winter heating season of 180 days an office is heated continuously for 10 hours a dayby a 3kW electric heater. Assuming the heater is only used during the heating season determine howmany gigajoules and kilowatt hours are consumed by the heater annually.(b) Calculate the available power for two hydro schemes. One of the scheme has a flow rate of 3.4litres/second. And the other is a large river with a flow of 100 m³ / second. Both have an effective headwhich is 80% of the actual head. The actual head is 125m for each. And the plant efficiency is 83% foreach.

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During the winter heating season of 180 days an office is heated continuously for 10 hours a day by a 3kW electric heater. Assuming the heater is only used during the heating season determine how many gigajoules and kilowatt hours are consumed by the heater annually.

During the winter heating season of 180 days an office is heated continuously for 10 hours a day by a 3kW electric heater. Assuming the heater is only used during the heating season determine how many gigajoules and kilowatt hours are consumed by the heater annually.

Refrigeration and Air Conditioning Technology (MindTap Course List)

8th Edition

ISBN:9781305578296

Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Chapter2: Matter And Energy

Section: Chapter Questions

Problem 27RQ: How many Btu/h would be produced in a 12-kW electricheater?

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Concept explainers

Conduction and Convection

When energy travels from one object to another it is said to have undergone heat transfer. Heat transfer is nothing but the transfer of thermal energy or internal energy from one thing to another, like e.g., when a vessel with water, kept on top of a burner, heats up because of the flame underneath it.

Question

Renewable Energy Systems

(a) During the winter heating season of 180 days an office is heated continuously for 10 hours a day
by a 3kW electric heater. Assuming the heater is only used during the heating season determine how
many gigajoules and kilowatt hours are consumed by the heater annually.

(b) Calculate the available power for two hydro schemes. One of the scheme has a flow rate of 3.4
litres/second. And the other is a large river with a flow of 100 m3
/ second. Both have an effective head
which is 80% of the actual head. The actual head is 125m for each. And the plant efficiency is 83% for
each

3 - (a) During the winter heating season of 180 days an office is heated continuously for 10 hours a day
by a 3kW electric heater. Assuming the heater is only used during the heating season determine how
many gigajoules and kilowatt hours are consumed by the heater annually.
(b) Calculate the available power for two hydro schemes. One of the scheme has a flow rate of 3.4
litres/second. And the other is a large river with a flow of 100 m³ / second. Both have an effective head
which is 80% of the actual head. The actual head is 125m for each. And the plant efficiency is 83% for
each.

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