New　solubility　data　of　R1234ze(E)　in　1-hexyl-3-methylimidazolium　trifluoromethansulfonate　([HMIM][TfO])　were　determined　at　the　temperature　from　293　K　to　343　K　and　the　pressure　from　0.078　MPa　to　0.631　MPa,　and　the　experimental　data　were　correlated　with　non-random　two-liquid　(NRTL)　equation.　The　performance　of　R1234ze(E)/[HMIM][TfO]　was　simulated　as　a　working　pair　in　a　single　stage　absorption　refrigeration　system.　The　simulation　results　are　as　follows:　1)　without　the　recovery　heat　exchanger,　high　generator　temperature,　low　circulation　ratio　and　absorber　temperature　contribute　to　high　efficiency;　2)　when　the　heat　exchanger　is　of　ideal　efficiency,　circulation　ratio　has　no　significant　influence　on　the　efficiency,　but　high　temperature　of　absorber　and　evaporation　temperature　contribute　to　efficiency.　©　2018,　Science　Press.　All　right　reserved.