由张子杨、张春路（通讯作者）与合作单位南通华信中央空调有限公司共同撰写的论文A frost-free dedicated outdoor air system with exhaust air heat recovery在Applied Thermal Engineering, 2018年第128卷在线发表。论文提出了一种新型的直膨式排风热泵热回收型新风机组，在制冷和制热名义工况下的COP分别达到3.3和4.8。特别地，在冬季制热运行时，通过压力调节阀实现两个蒸发温度，推迟甚至避免了蒸发器结霜，显著提升了机组性能，克服了现有新风机组应用于冬季寒冷地区的关键技术瓶颈。

【补充说明】本论文介绍的技术是GREATLAB在新风机/新风除湿机领域研制的第一代产品，目前的第二代产品的制冷和制热COP已经突破5.0，远超同类产品。

（参见：http://greatlab.tongji.edu.cn/pages/news/news_20170704.html）

论文链接：http://www.sciencedirect.com/science/article/pii/S1359431117304957

免费下载链接：https://authors.elsevier.com/a/1VmXH4r6Kur-Hz(有效期至2017年11月12日)

论文摘要：

DOAS (dedicated outdoor air system) has drawn much attention recently. However, it is quite energy-intensive resulted from the big temperature and/or humidity difference between outdoor air and supply air. This paper proposed a new DOAS with exhaust air heat recovery. In cooling mode, there are one evaporator and three condensers in parallel. The outdoor air is cooled and dehumidified by the evaporator. Besides the outdoor condenser, another two are used for supply air reheat and exhaust air heat recovery. In heating mode, the reheat coil is off and two evaporators work for exhaust air heat recovery and ambient heat absorption, respectively. A pressure regulating valve equipped on the indoor evaporator keeps proper evaporating temperature for a frost-free operation. A validated model is applied to fulfill the system design and performance prediction. The results showed that the system cooling COP reaches 3.3 at ambient temperature 35°C/28°C and the heating COP achieves 4.8 at ambient temperature 7°C/6°C, respectively. In winter the proposed system can maintain the desired supply temperature and keep both evaporators frost-free (ambient temperature -20°C to 10°C). The proposed system can efficiently recover waste energy from exhaust air in the whole year and has the extensive applicability, especially in the cold climate where considerable energy savings can be found.