Vapor　compression　refrigeration　is　considered　one　promising　technology　for　dissipating　much　higher　heat　fluxes　from　electronic　devices　at　lower　temperatures.　The　compressor,　one　key　component,　has　a　great　effect　on　the　overall　size　and　performance　of　the　system.　One　lightweight,　miniature,　hermetic　Wankel　compressor　was　developed　to　solve　limited　space　cooling　problems.　The　assembled　Wankel　compressor　had　a　diameter　of　65　mm,　a　length　of　85　mm　and　a　weight　of　340.2　g,　without　a　motor　and　housing.　An　experimental　system　for　miniature　refrigeration　was　set　up　to　explore　the　optimal　refrigerant　charge　and　the　performance　of　the　compressor　under　changing　rotational　speeds　and　inlet　temperatures　of　cooling　water.　The　experimental　results　showed　that　the　optimal　refrigerant　charge　was　220　g　and　the　coefficient　of　performance　was　approximately　2.8.　The　refrigeration　coefficient　of　the　system　decreased　with　increases　in　rotational　speed　and　inlet　temperature　of　the　cooling　water　at　a　stable　cooling　capacity　of　100　W.　The　developed　lightweight,　miniature,　hermetic　Wankel　compressor　had　reliable　performance　after　running　for　600　h,　with　a　power　consumption　of　35　W　and　a　high　coefficient　of　performance　(COP)　of　2.63.