The working pressure of Cornish boiler is lower than the Stirling boiler.

Explanation:

- Cornish Boiler: A Cornish boiler is a type of steam boiler that was developed in Cornwall, England during the 19th century. It is a horizontal, fire-tube boiler with a single flue. The flue runs the length of the boiler, allowing the hot gases from the furnace to pass through the tubes and heat the water surrounding them. The Cornish boiler is known for its simplicity and ease of maintenance.

- Stirling Boiler: A Stirling boiler is a type of water-tube boiler that was developed in the 19th century by the Scottish engineer Robert Stirling. It is designed to burn solid fuels such as coal or wood to produce steam. The Stirling boiler consists of several banks of tubes arranged in a circular pattern, with the combustion chamber located at the center. The hot gases from the combustion chamber pass through the tubes, heating the water surrounding them.

Working Pressure:

- The working pressure of a boiler refers to the pressure of the steam or water inside the boiler. It is an important parameter that determines the efficiency and performance of the boiler.

- In the case of Cornish boilers, the working pressure is relatively low compared to Stirling boilers. This is because Cornish boilers are designed to operate at lower pressures and are typically used for small industrial applications or heating purposes.

- On the other hand, Stirling boilers are designed to operate at higher pressures and are commonly used in large industrial applications such as power generation or steam locomotives. The higher working pressure in Stirling boilers allows for greater steam production and higher energy output.

Reasons for Lower Working Pressure in Cornish Boiler:

- Size and Design: Cornish boilers are generally smaller in size and have a simpler design compared to Stirling boilers. The smaller size and simpler design make it more suitable for lower working pressures.

- Heat Transfer: The single flue design of Cornish boilers provides a larger surface area for heat transfer, allowing for efficient heat exchange at lower pressures.

- Safety: Lower working pressures in Cornish boilers also contribute to their safety. The lower pressure reduces the risk of explosions or other safety hazards associated with high-pressure boilers.

Conclusion:

In summary, the working pressure of a Cornish boiler is lower than that of a Stirling boiler. This is due to the smaller size, simpler design, and lower heat transfer requirements of Cornish boilers. The lower working pressure in Cornish boilers makes them suitable for small industrial applications and heating purposes, while Stirling boilers are designed for higher-pressure applications in large industrial settings.