A　plate　HPHE　(heat　pipe　heat　exchanger)　has　been　designed　and　constructed　for　heat　recovery　in　this　paper.　The　plate　HPHE　is　constituted　by　plate　heat　pipes　with　microchannels.　Many　parameters　affect　the　performance　of　the　HPHE.　In　this　paper,　the　effect　of　three　parameters:　inlet　air　temperature　(27-40°C),　working　fluid　(methanol,　acetone,　R113,　R141b),　and　heat　exchange　area　(single　layer,　double　layer)　were　investigated　experimentally.　The　overall　experiments　were　carried　out　under　the　simulated　summer　condition,　the　vacuum　of　the　HPHE　was　set　at　1×10-3Pa,　and　the　filling　ratio　was　1/3.　The　air　volume　rates　were　changed　from　60,　90,　120　and　150　m3/h.　The　fresh　air　temperature　varied　from　27　to　40°C,　whereas　the　return　air　temperature　was　kept　at　about　24°C.　The　results　show　that,　at　the　same　air　volume,　the　effectiveness　increases　with　increase　of　the　inlet　temperature　of　fresh　air.　The　effectiveness　of　HPHEd　with　R141b　as　working　fluid　is　superior　to　R113,　acetone　and　methanol,　and　the　maximum　effectiveness　reaches　to　58%.　The　effectiveness　of　the　HPHE　of　single　layer　is　lower　than　that　of　double　layer　by　about　6%-18%　at　the　temperature　from　29　to　40°C.　©　2010　by　ASME.