Gas pressure drop can produce electricity
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Vabaõhumuusemi 2A-14, 13522 Tallinn, Estonia Tel. +372-5010996 Page 1 / 4 GAS PRESSURE DROP CAN PRODUCE ELECTRICITY If you look at a special energy map of Russia and Europe, you can see that it is all covered with blue lines indicating the main gas pipelines. Even an unqualified person can understand that the gas would not flow through these pipelines by itself – it should be first compressed to thrust it to a certain distance. To compress the gas to the pressure as high as 50-70 atm, a considerable amount of energy is needed. To describe our idea, we are going to depict a simplified layout of the gas transfer system. Let’s say, we need to forward the gas from the point it is obtained to a certain point N, which is 1000 km away. You cannot thrust the gas this far at one sweep and for that reason the pipeline is divided into 5 segments 200 km each, with compressor stations between the segments, where the gas is again compressed and transported further. Some amount of the gas is sidetracked through the Gas Distribution Stations (GDS) for local needs – for industries and consumers. But the pressure 50 atm is far too much for consumers´ equipment (gas stoves, etc.) and for that reason the pressure is lowered in GDS to 1-3 atm by a valve throttle. In that way, the energy used to compress and transport the gas through the pipeline, will be completely lost. TECHNOLOGY To produce cheap and ecologically clean electricity, our company has invented a technology that takes use of the gas pressure drop at GDP and at Pressure Reduction Points (PRP). If the process of lowering the pressure is done not in a reduction gear but in a generator equipment, which is installed parallel to the reducer, it is possible to generate ecologically clean electricity which equals to the energy of the pressured gas that passes the Detander Generation Unit (DGU). The capacity of the DGU is determined by the amount of gas passing through the turbine, pressure drop in the reducer and the temperature of the gas at the point of turbine input. Using this technology, our company has started the production of energy aggregates/generator units that can produce electricity without using any fuel. The equipment we produce is patented, very effective and proved to be very reliable in exploitation. DGU capacity is determined by the characteristics of a specific parameters – gas volume and pressure drop. AC generator with output voltage of 6.3 kV and 10.5 kV and frequency 50 Hz will make it possible to connect it to the electricity grid (with unlimited power) and to generate the electricity exactly with the same frequency and phase as in the grid.
Vabaõhumuusemi 2A-14, 13522 Tallinn, Estonia Tel. +372-5010996 Page 2 / 4 Our electric power stations are working parallel to the GDP (PRP), being in fact as an additional line to reduce the pressure of the gas. A special controlled bypass line is worked out to insure that the customers will get the gas without any interruptions in case of DGU failure. DGU LP (Low Pressure) Electric power station on a basis of low pressure generator unit with the possibility of increasing the power to the necessary level is meant to be used to generate electricity with voltage of 10.5 kV and 6.3 kV and frequency 50 Hz. This unit is meant to be connected to the grid of unlimited power.
Basic parameters of the LP aggregate Parameter DGU-5000LP DGU-2500LP DGU-1000LP Nominal power, kW 5000 2500
1000 Efficiency, % 80 80
80 Working resource, h 120 000 120 000
120 000 Nominal gas flow, m3/h 155 000 75 000
30 000 Minimal gas flow, m3/h 100 000 40 000
15 000 Gas pressure at detander input, MPa 0,5 – 1,2 0,5 – 1,2 0,5 – 1,2 Gas pressure at detander output, MPa 0,1 -0,25 0,1 -0,25 0,1 -0,25
This unit is installed at the PRP with the input gas pressure of max 1,2 MPa. The unit is assembled as a mono-block, where detander, reducer and generator are all mounted on the same frame. The unit is delivered with all the necessary systems for a electric power station, including a special bypass line with a set of fast responding valves that guarantee the feeding of gas to the Heat Power Station in case of temporary failure of the DGU. The unit set/completion varies according to customer´s needs. The equipment can be operated in an automatic mode. First prototype was made about 15 years ago and since then substantial improvements have been made in the construction of this unit turning the newest version of it very robust and trustful in operation and easy in maintenance and repairs.
Vabaõhumuusemi 2A-14, 13522 Tallinn, Estonia Tel. +372-5010996 Page 3 / 4 DGU HP (High Pressure) Electric power station on a basis of high pressure generator unit with the possibility of increasing the power to the necessary level is meant to be used to generate electricity with voltage of 10.5 kV and 6.3 kV and frequency 50 Hz. This unit is meant to be connected to the grid of unlimited power. Basic parameters of the HP aggregate Parameter DGU-6000HP DGU-2500HP DGU-1000HP Nominal power, kW 6000
2500 1000
Efficiency, % 80
80 80
Working resource, h 120 000
120 000 120 000
Nominal gas flow, m3/h 155 000
75 000 30 000
Minimal gas flow, m3/h 100 000
40 000 15 000
Gas pressure at detander input, MPa 3,5 – 5,5 3,5 – 5,5 3,5 – 5,5 Gas pressure at detander output, MPa 0,6 – 1,2 0,6 – 1,2 0,6 – 1,2
This unit is installed at the PRP with the input gas pressure of max 5,5 MPa. This power station is also approved by Gazprom. The unit is delivered either as an ordinary set of equipment or as a set of modules with all the necessary systems for an electric power station, including a control system, high voltage equipment, anti-fire system and a special bypass line with a set of fast responding valves that guarantee the feeding of gas to the Heat Power Station in case of temporary failure of the DGU. The unit set/completion varies according to customer´s needs. The unit set includes a special direct type gas heater that is needed to heat the gas at the point of detander input to increase the power and to regulate the temperature of the gas at the output. Minimum construction and montage work is needed. The equipment is operated in an automatic mode.
Vabaõhumuusemi 2A-14, 13522 Tallinn, Estonia Tel. +372-5010996 Page 4 / 4 In power generating business there is widely used a concept - INVESTMENT PER INSTALLED POWER For our equipment it is about 1000 – 1500 EUR per 1 kW installed For conventional solar cell power stations, this figure is as high as 3000 EUR per kWp Not to mention the fact that 1kWp in solar cell power stations gives around 1000 kWh of energy annually, while our unit give as much as 8000 kWh !!! Download 30.41 Kb. Do'stlaringiz bilan baham: 
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