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Figure 3 Prototype BurnerGen Pack tested in GET laboratory Tests have shown that the operating area of the BurnerGen Pack can be almost the same as a normal stand-alone low-Nox burner. The flame stability over the entire operating area is good; the gas- 3 air ratio can be varied over a wide range, and CO remains <10ppm and Nox < 60 mg/m (n) (3%O2). 2.2 Operation modes The system is developed for three operating modes: • Fresh air mode only; • The micro turbine is switched off or there is no grid connection; • Dual Air Burner mode: both the burner and the microturbine are in operation. Here, the microturbine is always at full load (60 kWe); • Turbine mode only: the flue gases of the micro turbine are led into the boiler by the Dual-Air Burner adapter, with the burner switched off. The boiler is used as an extra heat exchanger to extract the useful enthalpy of the hot flue gases. The 57 kWe produced by the micro turbine is, in practice, enough to operate the gas burner, the control equipment, the hot water circulation pumps and the auxiliary equipment in the boiler house. The microturbine is equipped with its own backup batteries and a switch unit for starting up after failure of the public electricity grid. The switch unit controls the switching from grid-connected to island-operation in a load (electrical power) following mode. 2.3 Energy balances A Sankey energy flow diagram of the BurnerGen Pack is given in figure 4. A gas compressor will be necessary in case the gas delivery pressure is below 5 barg. The gas compression takes, unfortunately, 3 kWe. The overall efficiency with gas compression is about 93%, without gas compression about 95%.PDF Image | SELF POWERED BOILER HOUSE: A NOVEL METHOD FOR INCORPORATING A MICRO TURBINE INTO AN EXISTING DOMESTIC ENERGY INFRASTRUCTURE FOR HEAT SUPPLY TO HOUSEHOLDS
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SELF POWERED BOILER HOUSE: A NOVEL METHOD FOR INCORPORATING A MICRO TURBINE INTO AN EXISTING DOMESTIC ENERGY INFRASTRUCTURE FOR HEAT SUPPLY TO HOUSEHOLDSOriginal File Name Searched:
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