A　pump-driven　heat　pipe　loop　device　was　proposed　for　recycling　energy　from　exhaust　air　and　reducing　energy　consumption　of　processing　fresh　air　in　air-conditioning　systems　of　public　buildings.　An　experimental　setup　was　built　to　investigate　performances　of　such　device　under　summer　and　winter　working　conditions.　Through　the　study　on　effect　of　mass　flow　rate,　heat　exchange　area　and　headwind　velocity　to　heat　transfer　rate,　temperature　efficiency　and　coefficient　of　performance　(COP),　the　optimum　mass　flow　rate,　heat　exchange　area　and　headwind　velocity　were　obtained.　Under　summer　working　condition,　the　device　had　achieved　the　heat　transfer　rate　of　4.09　kW　and　the　COP　of　9.26　at　the　mass　flow　rate　of　250　kgh-1,　the　heat　exchange　area　of　58.0　m2　and　the　headwind　velocity　of　1.8　ms-1.　Under　winter　working　condition,　the　device　had　achieved　the　heat　transfer　rate　of　6.63　kW　and　the　COP　of　14.20　at　the　mass　flow　rate　of　300　kgh-1,　the　heat　exchange　area　of　58.0　m2　and　the　headwind　velocity　of　1.8　ms-1.　©　All　Right　Reserved.