A transition is currently taking place in the electric power generation industry. Emision reduction targets set by the national governments call for a significant growth of renewable energy in the upcoming years as conventional power plants are being closed. However, the growing share of weather-dependent renewable energyposes significant challenges for the power system operators who are required to balance the consumption and production of electricity at all times.

One of the solutions for ensuring the stable operation of the power system in the future is demand response. Demand response means shifting consumption of electricity from periods of high load and price to more a affordable periods, or temporarily regulating consumption for the purpose of balancing the power system. However, traditionally demand response has been mainly utilized only by the large forest industry corporations in Finland.

This thesis evaluates the flexibility potential of a Finnish brewery that could be provided to Finnish reserves markets organized by the transmission system operator Fingrid. The purpose of the reserves is to stabilize the fluctuation of the frequency in the power grid. The key requirement for the participating loads from the brewery is to have no adverse impacts on the overall production process of the beverages, which significantly limits the number of potential flexibility sources.

Suitable capacity was found from the air handling units used in ventilation. In addition to ventilation, suitable capacity for FCR-D upwards regulation was found from the heat pumps used to recover heat from the wastewater as well as from the ammonia used in the refrigeration system of the facility. These loads can quickly ramp down their power consumption if required. However, restoring power consumption back to baseline will will require significantly more time.

Based on estimates, on average approximately 800 kW capacity from the loads of the brewery could participate in FCR-D upwards regulation. During the hours when utilization of heat pumps is low, some of the FCR-D capacity of AHUs can be exchanged for FCR-N capacity in order to increase the income from the reserve markets. However, the proposed more strict technical requirements of the reserves might decrease this capacity in the future.