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【单选题】
某地冬季室外通风计算温度0℃，采温室外计算温度－5℃，当地一散发有害气体的车间，冬季工作区采暖计算温度15℃，围护结构耗热量181.8KW。车间屋顶（高12M）设有屋顶风机进行全面通风，排风量8.8kg/s。当采用全新风集中热风采暖系统，送风量为8kg/s，车间屋顶梯度为0.5℃/m时，热风系统的送风温度为下列何值（）
A.
44.1－44.6℃
B.
44.8－45.2℃
C.
45.8－46.2℃
D.
46.8－47.2℃
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