Question

Refrigerant R-134a enters
compressor at 0.14 MPa and -10°C and exits at
0.8 MPa and 50°C. Take surrounding conditions Po = 95 kPa and T. = 20°C.
Calculate the exergy change of the refrigerant.
A) 36 kJ/kg
B) 37 kJ/kg
C) 35 kJ/kg
D) 38 kJ/kg​

Answer 1

Explanation:

PCB Material

The PCB material are standardized with different norms. One of the most common is FR4. It defines range for most of the parameter we need to know for the wire size calculation. The problem is range are large and the calculation will vary depends on where your PCB is in the given range.

The Thickness of dielectric = the PCB height.

This is why we found RF pcb : they are particularly thin as this is allowing to make smaller RF wires. This can be a variable parameter depending on your PCB provider sourcing and these variation may impact you radio quality.