Thermodynamics

Discuss the applications of thermodynamics in the field of energy technology.

Steam at gauge pressure of 1.5Mpa is supplied to a steam turbine, which rejects it to a condenser at a vacuum of 710mm Hg after expansion. Find the inlet and exhaust steam pressure in pascal, assuming barometer pressure as 76cm of Hg and density of Hg as 13.6×10³ kg/m^3.

Make a control volume around the turbine in the steam power plant in Fig. 1.1 and list the flows of mass and energy that are there.

If the efficiency of a power plant goes up as the low temperature drops why not let the heat rejection go to a refrigerator at say –10°C instead of ambient 20°C?

Consider availability (exergy) associated with a flow. The total exergy is based on the thermodynamic state, the kinetic and potential energies. Can they all be negative?  

Is the reversible work between two states the same as ideal work for the device?  

What is 1 cal in SI units and what is the name given to 1 N-m?

How much mass is there approximately in 1 L of mercury (Hg)? 

A mass of 1.5kg of air is compressed in a quasi static process from 0.1Mpa to 0.7Mpa for which PV = constant. The initial density of air is 1.16kg/m³. Find the work done by the piston to compress the air.

How much mass is in 0.25 gallon of liquid mercury (Hg)? Atmospheric air?