I D
× COMMENTARYIN THE NEWSNEWSFRONTSCHEMENTATOR + Show More BUSINESS NEWSTECHNICAL & PRACTICALFEATURE REPORTFACTS AT YOUR FINGERTIPSTECHNOLOGY PROFILEENVIRONMENTAL MANAGEREQUIPMENT & SERVICESFOCUSNEW PRODUCTS + Show More

Comment Heat Transfer

Steam generator operation and thermodynamics

By Chemical Engineering |

A well-operated steam generator can save money. In a steam-driven turbine system, water is heated in the steam generator to produce high-temperature, high-pressure steam. Steam is then expanded in a turbine to produce electricity from a generator. Turbine steam is condensed back into water in the condenser. A pump then returns the water to the steam generator. Engine thermodynamics Theoretically, the most efficient engine possible operates with a heat input (QH) at high temperature (TH) and a heat discharge (QL) at low temperature (TL) in which: (QH/TH) − (QL/TL) = 0 This case represents an unattainable ideal engine, because energy losses — due to friction, heat escaping from the system, flow disturbances and a variety of other factors — are inevitable. Entropy is the property scientists have used to describe this degree of disorder. Applying the concept to the situation in a steam generator and turbine system, the process cannot be made to do work without some extraction of heat from the process. In a conventional steam generator, QL is the heat removed in the condenser. And since the efficiency of a Carnot engine is η = 1 – (TL/TH), as the input temperature goes up or the exhaust temperature goes down,…
Related Content

Chemical Engineering publishes FREE eletters that bring our original content to our readers in an easily accessible email format about once a week.
Subscribe Now
Improving chemical production processes with IIoT and AI technologies
New filtration technology for highly corrosive media
PTA production: Lowering OPEX without compromising on quality
Sure that zero means zero in your zero-liquid discharge (ZLD) process?
How separation processes profit from Industrial Internet of Things (IIoT) solutions

View More

Live chat by BoldChat