The　status　of　the　＂Coal-to-Electricity＂　project　implemented　on　a　large　scale　in　North　China　was　introduced,　including　the　background,　history,　scale,　etc.　The　main　kinds　of　clean　energy　heater　equipment　used　in　the　＂Coal-to-Electricity＂　project　were　introduced,　especially　the　structural　type　and　working　principle　of　air　source　water-loop　heat　pump　were　introduced　and　analyzed　in　detail.　Data　analysis　of　actual　operation　performance　was　also　given.　Finally,　the　methods　used　for　project　implementation　and　the　problems　encountered　were　summarized.　(C)　2019　Elsevier　Ltd.　All　rights　reserved.