A　cooling　cycle　experimental　apparatus　with　a　modified　metal　foam　porous-wall　mini-channel　heat　sink　for　the　linear　Fresnel　concentrating　photovoltaic　(LFPV)　system　was　established　to　investigate　its　operation　character-istics.　The　maximum　heat　flux　used　in　the　test　rig　of　the　LFPV　system　was　about　37,000　W/m2.　In　this　study,　R141b　was　mixed　with　different　volume　fractions　of　R245fa.　The　cooling　effect　of　non-azeotropic　mixture　of　different　mixing　ratios　under　the　action　of　electric　field　was　experimentally　studied.　In　steady-state　experiments,　the　wall　temperature　and　heat　transfer　coefficient　of　the　heat　sink　are　investigated.　The　experimental　results　showed　that　the　heat　transfer　coefficient　of　the　heat　sink　increased　by　171%　at　an　applied　voltage　of　200　V　and　a　flow　rate　of　80　mL/min　for　the　R141b/R245fa-c　mixture.　In　the　dynamic　experiments,　the　critical　heat　flux　of　the　heat　sink　is　studied　and　the　results　showed　that　the　critical　heat　flux　of　the　R141b/R245fa-b　mixture　increased　by　45%　at　an　applied　voltage　of　200　V　with　a　flow　rate　of　75　mL/min.　The　use　of　R141b/R245fa　mixture　with　the　action　of　the　electric　field　can　greatly　enhance　the　performance　of　the　cooling　system　and　improve　the　operating　environment　of　the　photovoltaic　system.