You need to make this a transient simulation. Check out tutorials / training on how to do this.
Check your paraffin specific heat values - this dose not look correct. Will look something like this to account for the latent heat:
- How much energy to be stored by PCM during melting? You can calculate this by hand.
- How much energy to be delivered by PCM during solidification? You can calculate this by hand (same value as #1) unless you are interested in a specific time.
Thanks for your reply and suggestion for transient simulation.
Most of what you are looking for can simply be calculated. I think the time it takes to come to full heat - given a water flow and temperature would be important. What are you trying to optimize or what the end goal is?