I checked related questions, but they are more about visas, which is slightly different from my case.
I am a Chinese citizen holding a residence card in Norway. I have only a single entrance Schengen visa which has expired earlier this year. I plan to attend a conference in Ireland and a course at Svalbard. As Ireland and Svalbard are not Schengen area, I will leave Schengen area and re-enter when I come back. I am wondering if it is enough for me with my residence card, or if I need to apply for a new visa to enter Schengen area, (in my case just Norway)