Entrant: Dubai Electricity & Water Authority (Dewa)
Project owner: Dewa
EPC contractor: Apina
Project management: Dewa
The thermal energy storage turbine inlet air cooling (Testiac) design cools and stores chilled water during off peak hours and uses it for cooling the turbine inlet air during peak hours.
This shifts the load of chillers away from peak hours, when the demand for capacity is highest due to hot summer temperatures, and enables the size of the chillers to be optimised. As a result of the introduction of the system, the capacity of a Dubai water station increased by 111MW.
Dubai Electricity & Water Authority (Dewa) implemented this system for the first time in the world on modern F-class gas turbines in a record time frame. Seen as a learning opportunity, this was achieved using in-house capabilities, without the need for external consultants or support from the original equipment manufacturer. Its success was recognised locally and internationally.
It also qualified under the UN Framework Convention on Climate Change as a Clean Development Mechanism initiative due to the considerable reduction of greenhouse gases such as carbon dioxide.
The Testiac system allows for reduced fuel consumption, leading to average savings of an estimated AED28.3m ($7.7m) a year for the next 30 years