Recent content by wrenchtime

So, the water cycle of the Rankine cycle is the system. Therefore the Energy used by the boiler feed pump Energy used to heat the water in the boiler Energy released to the turbine Energy released in the condenser to cool the water Are the surrounding?

I will not use it if you... Could you explain what the system is in my boiler example using the wikipedia's definition. Also how to define performance issues using your approach.

Thank you for the feedback I must be missing the point using my definition of a system which is "A System is the transfer of energy between two mediums." Could you explain what the system is in my boiler example using the wikipedia's definition. Also how to define performance issues using...

Thank you for your feedback Let me rephrase it in a different way with an example. I have system that contains two mediums "A" and "B". Assume medium "A" has a higher energy level than medium "B The system is the transfer of energy from medium "A" to medium "B" From medium "B" viewpoint it...

Thanks for the response One benefit to my approach is to account for all the energy losses to the surroundings or the energy usage by a source typically required in the real world applications. The goal was to tie a thermodynamic system to the laws of thermodynamics (rules of energy). Also...

Can a system be defined as the transfer of energy between two mediums? An example of this approach is the Rankine cycle for a power plant (water and steam cycle) This cycle would be defined by four systems. System 1 (boiler feed pump) Energy released by boiler feed pump…...Energy added to...

To convert (psia) x (ft3 / lbm) to Btu / lbm 1 Btu / lbm = (1 lbf/in2) x (1 ft3/lbm) x (1 Btu/778 ft-lbf) x (144 in2/ 1 ft2) = 0.185 Btu/lbm The equation in metric units is h = u + (1000) P v With units h = kg /kj u = kg /kj P = Mpa v = m3/kg

Should h = u + Pv be h = u + (0.185)Pv (Btu/lbm) where units for h and u are (Btu/lbm) P (psia) and v (ft*3/lbm) On a Temperature and specific entropy graph h... represents the area under the curve at a constant specific pressure u... represents the area under the curve at a...

Suppose we refine some of terms in thermodynamics based on the follow statements: 1. All energy has two components: work energy and heat energy. 2. Work is the change in work energy which is equal to the energy available to do work. 3. Heat is the change in heat energy which is equal to the...