Waste Heat Sources + Trends

Waste Heat losses and Work Potential from Selected Processes
Waste Heat losses and Work Potential from Selected Processes

You might be able to name a few sources of waste heat, but do you know what distributes the largest content?

Waste heat losses arise both from equipment inefficiencies and from thermodynamic limitations on equipment and processes. Continue reading “Waste Heat Sources + Trends”

Retrofitting – Why Turbine Seals Are Important

Wreckage of 330 MW Turbine-generator from LP rotor burst
Wreckage of 330 MW Turbine-generator from LP rotor burst

Whether it is caused by a “poor” design, extreme operating conditions or even too much deterioration, turbine failures can occur. In order to help prevent these it is necessary to perform regular maintenance on all parts of the machine and control the conditions at which the turbine is operating at any moment in time as well as performing repairs and retrofits to keep the pieces in good shape.

One way to improve steam turbine efficiency is through better seals. However, when designed incorrectly they can create significant damages and performance losses in the turbine. Sealing steam turbine rotors presents several challenges. Any gap between the rotor and the packing lets the steam escape, dropping the pressure and wasting energy. If the packing ring is too tight, however, the rotor will rub, which creates localized hot spots. Continue reading “Retrofitting – Why Turbine Seals Are Important”

What’s An Ideal Heat Engine Cycle?

The Carnot cycle is the most efficient cycle possible for converting a given amount of thermal energy into work or, conversely, for using a given amount of work for refrigeration purposes.

Every thermodynamic system exists in a particular state. A thermodynamic cycle occurs when a system is taken through a series of different states, and finally returned to its initial state. In the process of going through this cycle, the system may perform work on its surroundings, thereby acting as a heat engine. Continue reading “What’s An Ideal Heat Engine Cycle?”