Entropy/enthalpy and enthalpy/entropy conversions were carried out at several pressures in the range 0 to 4 MPa. It will be seen that the approximating functions produce values close to those given in the steam tables, despite the approximation inherent in assuming specific heat is independent of the degree of superheat. The steam will then become superheated. The steam is piped to a steam piston engine or a steam turbine where it expands and generates mechanical energy in the form of shaft power. The equations which are developed in this paper are for saturated pressure and temperature, and for enthalpy, entropy, and specific volume in saturated liquid and saturated vapour states. ScienceDirect ® is a registered trademark of Elsevier B.V. ScienceDirect ® is a registered trademark of Elsevier B.V. URL: https://www.sciencedirect.com/science/article/pii/B9781845695774500041, URL: https://www.sciencedirect.com/science/article/pii/B9781455732012000045, URL: https://www.sciencedirect.com/science/article/pii/B9780750673280500240, URL: https://www.sciencedirect.com/science/article/pii/B9780081005101000016, URL: https://www.sciencedirect.com/science/article/pii/B9780081003374000115, URL: https://www.sciencedirect.com/science/article/pii/B9780128195048000020, URL: https://www.sciencedirect.com/science/article/pii/B9780080217352500379, URL: https://www.sciencedirect.com/science/article/pii/B9780857092571500048, URL: https://www.sciencedirect.com/science/article/pii/B9780080340616500196, URL: https://www.sciencedirect.com/science/article/pii/B9780750641616500171, Pollution Control and Resource Recovery: Municipal Solid Wastes Incineration, 2017, The effects of sterilization on medical materials and welded devices, Joining and Assembly of Medical Materials and Devices, Material Requirements for Plastics Used in Medical Devices, Plastics in Medical Devices (Second Edition), Theoretical basis of the Organic Rankine Cycle, Organic Rankine Cycle (ORC) Power Systems, Direct steam geothermal energy conversion systems, Power Plant Instrumentation and Control Handbook (Second Edition), ENHANCED OIL RECOVERY IS AN IMPORTANT WAY TO INCREASE OIL RESOURCES, The Future Supply of Nature-Made Petroleum and Gas, EXTERNAL COMBUSTION ENGINES AND USE OF BIOMASS FUELS, Simulation of Industrial Processes for Control Engineers, The following functions for the properties of. This leads to a cheap plant, but the efficiency will be low, typically 5%. Compact design and built-in temperature and pressure compensation offered high accuracy. challenge to its users. produce, requiring costly machines to create the right temperature. important, as any damage to turbines can be catastrophic to both the process and the Steam with this relationship is saturated steam, otherwise it can be considered superheated steam for metering. This is incredibly Diagram of working principles for steam engine power plants. For saturated steam it’s easy to know the density only need to check the table under given temperature or pressure factor. changes through pressure. Briefly, the value of pressure and temperature are correspondence, but not for superheated steam. The following hydration reaction is likely to happen when hemi-hydrate gypsum meets water. can be found here: Electronic Temperature Control of Saturated Steam. Have temperature and pressure compensation in steam measurement is important. cases. superheated steam, including how and why they are used in applications. Saturated steam is pure steam in direct contact with the liquid water from which it was generated and at a temperature of water at the existing pressure. For superheated steam measurement high accuracy temperature and pressure compensation will be the only way since the different pressure and different temperature with different density. useful and usable product. The following functions for the properties of saturated steam and water are approximately valid up to a pressure of 4 MPa/temperature of 250°C, typical of the range needed to model the turbine driving a boiler feedpump in a power station. Steam with this relationship is saturated steam, otherwise it can be considered superheated steam for metering. Superheated steam is not as ubiquitous, but still has an important use case: turbines.
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