This paper investigates a retrofitting strategy that turns coal power plants into thermal energy storage (TES) and zero-carbon data centers (DCs).. This paper investigates a retrofitting strategy that turns coal power plants into thermal energy storage (TES) and zero-carbon data centers (DCs).. The United Nations' Intergovernmental Panel on Climate Change (IPCC) has confirmed that continued greenhouse gas emissions, particularly from thermoelectric power plants, will accelerate global warming. The consequences of this include extreme weather events such as heavy rainfall, floods, severe. . For this purpose, E2S power has developed a simple and compact system that converts surplus electrical energy from wind farms or solar power plants into heat, stores the heat using innovative high energy density materials and, when required, generates superheated steam at a constant temperature to. . Recent research has focused on various strategies to improve the adaptability of coal-fired power plants, including the integration of thermal energy storage systems, retrofitting existing plants, and optimizing operational methods. One promising approach is the integration of thermal energy. . This paper investigates a retrofitting strategy that turns coal power plants into thermal energy storage (TES) and zero-carbon data centers (DCs). The proposed capacity expansion model considers the co-locations of DCs, local renewable genera-tion, and energy storage with the system-level coal. . Energy storage is essential for on-demand electricity generation from renewable sources like wind and photo-voltaics. Repurposing fossil-fired power plants with thermal energy storage (TES) offers a cost-effective solution for large-scale grid energy storage. This paper explores converting.