多级除湿转轮系统是提高除湿性能的有效途径。本文提出了一种热泵驱动的两级干燥剂转轮（HPTW）系统。在两个相邻的干燥剂轮之间，在处理后的空气侧插入一个蒸发器，为除湿提供冷却能力，在再生空气侧插入一个冷凝器，为再生提供热容量。可实现50oC（122oF）以下的低再生温度，系统COP大于4，优于传统的冷凝除湿方法或单级除湿轮系统；处理后的室外空气湿度比越低，两级除湿轮系统的COP越高。建议的HPTW系统可应用于办公楼除湿，实现温度和湿度独立控制，并可使用高蒸发温度冷却器（HEC）处理显热负荷。 在北京和广州的一座典型办公楼中对HPTW和HEC系统的性能进行了模拟。使用DeST软件计算建筑物逐小时的敏感荷载和潜在荷载。分析了HPTW和HEC系统的年能耗，并与采用低蒸发温度制冷机（LEC）的传统暖通空调系统进行了比较。结果表明，与传统系统相比，该系统的节能潜力约为15-35%。引用:ASHRAE论文CD:2014 ASHRAE冬季会议，纽约

Multi-stage desiccant wheel systems are an effective way to increase the performance of desiccant dehumidification. In this paper, a heat pumpdriventwo-stage desiccant wheel (HPTW) system is proposed. Between two adjacent desiccant wheels, an evaporator is inserted at the processed airside to provide cooling capacity for dehumidification, and a condenser is inserted at the regeneration air side to provide heat capacity for regeneration.A low regeneration temperature under 50oC(122oF) can be realized, and the system COP is higher than 4, which is better than traditionalcondensation dehumidification methods or single-stage desiccant wheel systems; the lower the humidity ratio of the processed outdoor air, the higherthe COP of the two-stage desiccant wheel system. The proposed HPTW system can be applied in office buildings for dehumidification to realizetemperature and humidity independent control, and a high evaporating temperature chiller (HEC) can be used to deal with the sensible heat load.The performance of the HPTW and HEC system is simulated in a typical office building in Beijing and Guangzhou. The hour-by-hour sensibleand latent loads of the building are calculated using DeST software. The annual energy consumption of the HPTW and HEC system isanalyzed and compared with that of a traditional HVAC system using a low evaporating temperature chiller (LEC). The results show that theenergy-saving potential of the proposed system is around 15-35% compared to the conventional system.