在寒冷气候区，例如ASHRAE气候区IV和V，由于压缩机排放温度高、压力比大以及在低环境温度下加热能力不足，传统的电动空气源热泵（ASHP）无法正常工作。因此，需要大量使用辅助条带加热来满足建筑物的热负荷。我们引进创新的ASHP技术，作为消除辅助带钢热使用的持续努力的一部分，并以可接受的成本效益和可靠性最大限度地提高加热COP。这些创新型ASHP是使用串联压缩机开发的，能够在低温下提高加热能力，并在中温下保持优异的部分负荷运行效率。研究了两种串联压缩机方案；第一种方法使用两个相同的、单一的- 第二台采用两台相同的蒸汽喷射压缩机。调查基于系统建模和实验室评估。两种设计均成功满足性能标准。实验室评估表明，串联单速压缩机ASHP系统能够在47°F（8.3°C）下达到加热COP=4.2，在17°F（-8.3°C）下达到COP=2.9，在-13°F（-25°C）下达到76%的额定容量和COP=1.9。这会产生HSPF=11.0（根据AHRI 210/240）。串联蒸汽喷射ASHP能够在47°F（8.3°C）下达到加热COP=4.4，在17°F（-8.3°C）下达到COP=3.1，在-13°F（-25°C）下达到88%额定容量和COP=2.0。这将产生HSPF=12.0。本文介绍了系统建模和进一步的实验室评估。引文:2016年冬季会议，佛罗里达州奥兰多，2016年交易，第122卷第。 1

In cold climate zones, e.g. ASHRAE climate regions IV and V, conventional electric air-source heat pumps (ASHP) do not work well, due to high compressor discharge temperatures, large pressure ratios and inadequate heating capacities at low ambient temperatures. Consequently, significant use of auxiliary strip heating is required to meet the building heating load. We introduce innovative ASHP technologies as part of continuing efforts to eliminate auxiliary strip heat use and maximize heating COP with acceptable cost-effectiveness and reliability. These innovative ASHP were developed using tandem compressors, which are capable of augmenting heating capacity at low temperatures and maintain superior part-load operation efficiency at moderate temperatures. Two options of tandem compressors were studied; the first employs two identical, single-speed compressors, and the second employs two identical, vapor-injection compressors. The investigations were based on system modeling and laboratory evaluation. Both designs have successfully met the performance criteria. Laboratory evaluation showed that the tandem, single-speed compressor ASHP system is able to achieve heating COP = 4.2 at 47°F (8.3°C), COP = 2.9 at 17°F (-8.3°C), and 76% rated capacity and COP = 1.9 at -13°F (-25°C). This yields a HSPF = 11.0 (per AHRI 210/240). The tandem, vapor-injection ASHP is able to reach heating COP = 4.4 at 47°F (8.3°C), COP = 3.1 at 17°F (-8.3°C), and 88% rated capacity and COP = 2.0 at -13°F (-25°C). This yields a HSPF = 12.0. The system modeling and further laboratory evaluation are presented in the paper.