This study investigates the performance of an integrated CO₂ (R744) heat pump and chiller unit in a Norwegian hotel. The system consists of a single unit for heating, cooling and hot water with an integrated thermal storage. The thermal system of the hotel is described and data from the first year of operation are analyzed. Using the field measurements, hot water loads and COPs are calculated and averaged to 20-minute intervals. The heating and cooling capacities supplied by the R744 unit are studied on a weekly and monthly basis to evaluate the seasonal behavior of the system. The hot water storage holds an energy capacity of 350 kWh at fully charged conditions and demonstrates peak demand reductions of more than 100 kW during a 2-day period. The results show that the hot water usage accounts for 52% of the annual heat load of the hotel. Energy efficiency analysis of the integrated R744 system reveals an annual system SCOP of 2.90, and thus an untapped system potential that can be exploited by increasing the AC load delivered by the R744 unit. Other factors that greatly influence the efficiency of the system are variations in the ambient temperature and high gas cooler exit temperatures. The latter is often a result of high temperatures in the water returning from the subsystems of the hotel. This can be improved by reducing the number of starts and stops of the R744 unit and by insuring stratification in hot water tanks.

这项研究调查了集成CO ₂的性能（R744）一家挪威旅馆中的热泵和冷却器单元。该系统由一个用于加热，冷却和热水的单元组成，并带有集成的蓄热器。描述了酒店的热力系统，并分析了运营第一年的数据。使用现场测量，计算热水负荷和COP，并将其平均到20分钟间隔。每周和每月对R744单元提供的供热和制冷能力进行评估，以评估系统的季节性行为。在充满电的条件下，热水存储的能量容量为350 kWh，并且在两天内显示出峰值需求降低超过100 kW。结果表明，热水使用量占酒店年热负荷的52％。集成的R​​744系统的能效分析显示，系统的年度SCOP为2.90，因此，未开发的系统潜力可以通过增加R744单元提供的交流负载加以利用。影响系统效率的其他因素还包括环境温度的变化和较高的气体冷却器出口温度。后者通常是从酒店子系统返回的水中高温造成的。可以通过减少R744装置的启动和停止次数以及确保热水箱中的分层来改善这一点。影响系统效率的其他因素还包括环境温度的变化和较高的气体冷却器出口温度。后者通常是从酒店子系统返回的水中高温造成的。可以通过减少R744装置的启动和停止次数以及确保热水箱中的分层来改善这一点。影响系统效率的其他因素还包括环境温度的变化和较高的气体冷却器出口温度。后者通常是从酒店子系统返回的水中高温造成的。可以通过减少R744装置的启动和停止次数以及确保热水箱中的分层来改善这一点。