热能储存用于节能、移峰和降低功率。地下储存或储罐储存，利用地面或水作为储存材料，是实现这一目的的常见解决方案。特别是对于冷库，当冷库的充放电温差变小时，冷库的体积变大。相变材料（PCM）或化学反应因此使用高潜热。冰是用于此目的的常见材料，但充电需要低于零度。 蜡或盐用于首选或要求温度高于零的情况。在使用PCM或化学反应进行热能储存的情况下，白天利用夜间低温进行舒适制冷，夜间或周末利用区域供暖系统的非高峰热量进行一周的供暖和制冷，以及利用热能储存降低吸收式制冷机的所需功率。《国际能源机构关于通过储能节能的实施协议》附件10和附件17涉及减少引入第三阶段的技术、经济和其他市场壁垒- 改变材料或化学反应以储存热能。示范项目和可行性研究是用于此目的的手段。单位:SICitation:Symposium，ASHRAE交易，第109卷，pt。1.

Thermal energy storage is used for energy conservation, peak shifting, and power reduction. Underground storage or storage in tanks utilizing the ground or water as storage material is a common solution for this purpose. Especially for cold storage, where the temperature difference between charging and discharging of the storage becomes small, the volume of the storage becomes large. Phase-change materials (PCM) or chemical reactions therefore use the high latent heat. Ice is a common material for this purpose but requires subzero degrees for charging. Waxes or salts are used for situations where temperatures above zero are preferred or required.Use of low nighttime temperatures for comfort cooling during daytime, off-peak heat from district heating systems during nights or weekends for heating and cooling during the week, and thermal energy storage for decreasing the required power of an absorption chiller are examples where PCM or a chemical reaction is used for thermal energy storage.Annex 10 and Annex 17 of the Implementing Agreement on Energy Conservation through Energy Storage within the International Energy Agency are concerned with reducing technical, economic, and other market barriers for introduction of phase-change material or chemical reactions for thermal energy storage. Demonstration projects and feasibility studies are the means utilized for this purpose.Units: SI