Demand response (DR) is one of the energy management strategies that can relieve the strain on power grid by balancing the energy consumption and production. Cold storage in warehouses and cold rooms, due to the high thermal inertia contained in the stored products, is a promising solution for applying DR. For cooling applications, different DR strategies can be considered: stopping evaporator fans or stopping the refrigeration machine, producing more cooling power during off peak hours and reducing the cooling operation during on peak hours, etc. However, these scenarios need to be carefully applied to respect the temperature regulation in order to maintain food quality and security. Moreover, DR application might lead to an increase of power demand when restarting the cold machine – the postponing power effect or an over-consumption of energy for the recovery of the temperature level before DR – the postponing consumption effect. This paper presents an experimental investigation of DR application in a loaded cold room; the impact of several DR parameters: product load, outside temperature, set point temperature and DR duration were assessed. The results showed that DR has limited impact on the stored product: a maximum increase of 1.1 °C at the product core after 3 days of DR application, one DR per day. However, a cumulative effect of DR applications on product temperature was observed. The indicators of the postponing power effect and consumption variation showed important impacts of studied parameters on the system behaviour during DR application.

需求响应（DR）是一种能源管理策略，可以通过平衡能源消耗和生产来缓解电网压力。由于存储产品中包含的高热惯性，在仓库和冷藏室中进行冷藏是应用DR的有希望的解决方案。对于制冷应用，可以考虑不同的DR策略：停止蒸发器风扇或停止制冷机，在非高峰时段产生更多的制冷功率，以及在高峰时段减少制冷操作，等等。但是，这些情况需要谨慎地应用于尊重温度调节，以保持食品质量和安全。此外，重新启动冷机时，DR的应用可能导致功率需求的增加（延迟的功率效应）或DR之前恢复温度水平的能量过度消耗（延迟的消耗效应）。本文介绍了在有负载的冷室中进行DR的实验研究。评估了几个DR参数的影响：产品负载，外部温度，设定点温度和DR持续时间。结果表明，DR对储存的产品影响有限：施用DR的3天后，产品核心的最高温度升高为1.1°C，每天增加1 DR。但是，观察到DR施用对产品温度的累积影响。