Imagine remote areas far from urban centers where nights are no longer shrouded in darkness, but illuminated by reliable and affordable electricity. This vision is becoming reality through Siemens Energy's Heat ReCycle solution, which combines proven gas turbine technology with advanced Organic Rankine Cycle (ORC) systems to bring power to energy-deprived regions worldwide.

As global energy demand continues to rise, disparities in energy access remain significant. Remote and isolated communities often face insufficient or nonexistent electricity supply. While diesel generators have traditionally provided power in these areas, they come with high costs, significant pollution, and dependence on continuous fuel supply. The Heat ReCycle solution emerges as an innovative alternative, offering more economical, environmentally friendly, and reliable power generation.

• Economic Efficiency: Provides cost-effective electricity throughout its lifecycle by improving generation efficiency and reducing fuel consumption.
• Environmental Protection: Produces significantly lower emissions of nitrogen oxides (NOx), carbon dioxide (CO2), and unburned hydrocarbons (UHC) compared to traditional diesel generators.
• Water Conservation: Operates without water consumption, making it ideal for water-scarce regions where resources are needed for agriculture and domestic use.
• Reliability: Leverages well-established gas turbine and ORC technologies that have proven stable performance across various operating conditions.
• Flexibility: Can be customized to meet different power output requirements, with configurations ranging from 10 MW to nearly 100 MW capacity.
• Remote Operation: Designed for unmanned operation with remote monitoring capabilities, reducing operational costs in isolated locations.

The system's core technology integrates gas turbines with ORC systems. Gas turbines generate electricity while producing high-temperature exhaust gases. The ORC system then recovers this waste heat through heat exchangers, using it to vaporize an organic working fluid that drives an ORC turbine to produce additional electricity.

Compared to conventional water/steam cycles, the ORC system offers:

• Higher efficiency in utilizing lower-temperature waste heat
• Lower operating pressures that simplify equipment design
• Water-free operation
• Simpler system architecture for easier maintenance

• Operational flexibility to adjust turbine usage based on demand
• Enhanced reliability through redundant units
• High efficiency reaching 47-50%

SGT-400 Gas Turbine: A robust dual-shaft turbine adaptable to various climates and fuel types (natural gas, liquid fuels, or dual-fuel operation), featuring low emissions and proven reliability with over 390 units installed globally.

Waste Heat Recovery Unit (WHRU): A simplified, modular heat recovery system that efficiently captures exhaust heat while minimizing installation time and costs.

This innovative power solution demonstrates competitive advantages in power density, capital expenditure, and levelized cost of electricity (LCoE) compared to conventional alternatives in the same capacity range.