The amount of energy lost from generation of electricity to the time it reaches the consumer from brown and black coal

IELTS Academic Writing Task 1 - Graph

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IELTS Writing Task 1 Question

The graph below shows the amount of energy lost from generation of electricity to the time it reaches the consumer from brown and black coal. Summarise the information by selecting and reporting the main points and make comparisons where relevant.

Common Questions for Data Summary

1. Diagram Type: Graph.

2. Title: Energy Loss from Coal Generation to Consumer (Black and Brown Coal).

3. What is being described?: The amount of energy lost in power stations, transmission, and distribution for electricity generation from black and brown coal, before it reaches the consumer.

4. Where is this process happening?: Energy generation from black and brown coal, with energy loss occurring at power stations, and during transmission and distribution.

5. What is the data about?: Energy efficiency comparison between black and brown coal in terms of energy loss during the process of electricity generation and delivery to the consumer.

6. Topic: Comparison of energy loss and efficiency between brown and black coal.

Comparison Showing and Trends Any change over time (such as an increase or a decrease) is a trend.

Details:

Energy Loss in Power Station: 73% of energy is lost in the power station from black coal, whereas 63% of energy is lost from brown coal—indicating a 10% lower loss for brown coal.
Energy Loss in Transmission and Distribution: The energy loss during transmission and distribution is identical for both types of coal, with 3% loss in both cases.
Energy Reaching the Consumer: 24% of energy from black coal reaches the consumer, while 34% of energy from brown coal reaches the consumer—demonstrating that brown coal is more energy-efficient.

Sample Answer

The graph compares the energy loss and efficiency in generating and transmitting electricity from black and brown coal.

Overall, although a substantial amount of energy is lost in both cases before reaching the consumer, brown coal is more efficient than black coal in terms of energy conservation and delivery to the consumer.

From the graph, 73% of the energy from black coal is lost in the power station, while brown coal experiences a lower energy loss of 63%. The difference of 10% highlights that brown coal is relatively more efficient in power generation. Both black and brown coal experience an equal 3% loss during transmission and distribution, indicating no disparity at this stage.

However, a significant difference emerges when considering the energy that actually reaches the consumer. Only 24% of the energy generated from black coal reaches the consumer, while a higher percentage of 34% reaches the consumer from brown coal.

Top 26 Vocabulary

Vocabulary	Meaning	Synonyms	Examples	Type
Transmission	The process of sending energy or electricity over distances	Distribution, delivery	“Both coal types lost 3% of energy during transmission.”	Noun
Distribution	The act of delivering energy or resources to various locations	Allocation, supply	“Energy loss during distribution was the same for both coal types.”	Noun
Power station	A facility where electricity is generated	Power plant, energy station	“The power station from black coal experienced 73% energy loss.”	Noun
Efficient	Achieving maximum productivity with minimum wasted effort or energy	Productive, effective	“Brown coal is more efficient than black coal in delivering energy.”	Adjective
Loss	The amount of energy that is wasted or not used	Waste, depletion	“The loss of energy from brown coal is lower than from black coal.”	Noun
Generation	The process of producing electricity	Production, creation	“Electricity generation from coal results in energy loss.”	Noun
Conversion	The process of changing energy from one form to another	Transformation, alteration	“Energy conversion at the power station results in some loss.”	Noun
Output	The amount of energy or electricity produced	Production, yield	“The power station’s energy output is affected by losses.”	Noun
Consumption	The use of energy by consumers	Utilization, usage	“Only 34% of brown coal energy is available for consumption.”	Noun
Efficiency	The ability to minimize waste while achieving results	Productivity, effectiveness	“Brown coal has higher efficiency than black coal.”	Noun
Fuel source	The material used to generate power	Energy source, raw material	“Coal is a major fuel source for electricity production.”	Noun
Coal-fired	Powered by burning coal	Coal-based, thermal	“A coal-fired power station converts coal into electricity.”	Adjective
Thermal energy	Energy produced from heat	Heat energy, calorific power	“Coal burning produces thermal energy for electricity.”	Noun
Heat loss	The loss of thermal energy during a process	Energy dissipation, waste heat	“Heat loss occurs at various stages of electricity production.”	Noun
Depletion	The reduction in the amount of a resource	Exhaustion, reduction	“Energy depletion occurs due to inefficiencies in power plants.”	Noun
Carbon footprint	The total greenhouse gases emitted by an activity	Environmental impact, emissions level	“Coal-fired plants have a high carbon footprint.”	Noun
Emission	The release of gases or particles into the atmosphere	Discharge, pollution	“Coal combustion results in carbon dioxide emissions.”	Noun
Grid	A network for transmitting electricity	Power network, distribution system	“Electricity is delivered to consumers via the power grid.”	Noun
Load capacity	The maximum amount of electricity a system can handle	Power limit, capacity	“The load capacity of a grid affects energy distribution.”	Noun
Wastage	The unnecessary loss of energy or resources	Inefficiency, dissipation	“Wastage occurs at multiple stages in energy production.”	Noun
Harnessing	The act of capturing and utilizing energy	Utilizing, extracting	“Harnessing coal energy involves burning it for power.”	Verb
Transmission loss	The reduction in energy during transportation	Power dissipation, leakage	“Transmission loss occurs as electricity moves through wires.”	Noun
Retained	Kept or preserved instead of being lost	Preserved, conserved	“Brown coal retains more energy than black coal.”	Verb
Sustainability	The ability to maintain a process without depletion	Eco-friendliness, durability	“Coal energy lacks sustainability due to high emissions.”	Noun
Infrastructure	The basic facilities needed for power distribution	Framework, foundation	“Energy infrastructure includes power plants and transmission lines.”	Noun
Optimization	The act of making something as effective as possible	Enhancement, improvement	“Optimizing energy use reduces losses.”	Noun

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