Problem$-1$

A $1-$m$3$ rigid tank contains $100kgR-410$ a at a temperature of $15C,$ as shown below. A valve on top of the tank is opened, and saturated vapor is throttled to ambient pressure, $100$ kPa and flows to a collector system. During the process, the temperature inside the tank remains at $15C$ by heat transfer from the $20C$ ambient. The valve is closed when no more liquid remains inside. Calculate the heat transfer to the tank and total entropy generation in the process.