The diagram below shows how one type of coal is used to produce electricity. Summarise the information by selecting and reporting the main features, and make comparisons where relevant.
The flow chart illustrates the process by which electricity is produced from coal. Overall, the process begins with the extraction of coal, followed by transportation and various stages of processing, culminating in the supply of electricity to homes and the electricity grid.
The first step involves extracting coal from mines, after which it is crushed into smaller pieces using a special machine. The crushed coal is then transported to a gasifier, where it undergoes gasification. During this process, the coal is subjected to high temperatures, resulting in the production of synthetic gas. This gas is then transported to a cooling plant where it is cooled down, and waste heat is discharged. Following the cooling process, the gas is cleaned to remove impurities.
After cleaning, the gas is sent to a gas power plant. At this plant, it is combusted to generate electricity. During combustion, waste heat is produced and discharged again. The final step involves transmitting the generated electricity through power lines to homes and the electricity grid, ensuring a steady supply of power.
The essay is logically structured and follows the sequence of the process effectively. However, some transitions between stages could be smoother.
Suggestions
- Use more linking words to improve flow.
- Ensure each stage is clearly connected to the next.
The vocabulary used is appropriate and varied, but there is room for more precise terminology.
The essay demonstrates a good range of grammatical structures with minor errors.
The essay effectively summarizes the diagram and includes all key stages of the process. Comparisons are minimal but not necessary given the task.