ENERGY SAVING TURBOEXPANDERS (TURBO EXPANDER GENERATOR) (UTDU)

Energy saving turboexpanders (turbo expander generator) (UTDU) are intended for production of electric power by recuperation of energy of natural gas excess pressure at units of its reduction - gas-distribution stations (GDS), at gas distribution points (GDP) of heat power plants and large industry companies.

At present «Turbogaz» JSC manufactures energy saving turboexpanders (turbo expander generator) of own design with different power: 8kW, 300 kW, 500 kW, 1МW, 2,5МW; 4МW; 5МW; 6МW; 8МW; 12МW for input gas pressure to 7.5 МPа and with gas flow of 0.05-6 mln. nm³/24 h.

Theoretical researches and practical experience show, that natural gas excess pressure energy saving by turboexpanders greatly corresponds to tasks of energy saving as economy of fuel for electricity production and improvement of ecology environment.

Apply international standards ANSI, API, ASME, DIN, ISO, GOST, DSTU.

Joint company by order of National joint-stock company «Naftogaz of Ukraine» performed technical feasibility analysis of implementation of energy save turboexpander (turbo expander generator) into gas transportation system of Ukraine.

Results of the above-mentioned scientific work were reflected in the decision of the Cabinet of Ministers of Ukraine dated July 27, 2006 No.436-р, according to which for realization of energy strategy of Ukraine is intended implementation of 54 energy saving turbine expanders at GDS of National joint-stock company «Naftogaz of Ukraine» before 2030.

For performance of this order «Turbogaz» PJSC was ordered development and supply of two installations UTDU-4000-UKhL4, with power of 4000 кW each, at GDS of Zaporozhye and Severodonetsk. In 2008 was introduced into operation energy saving turboexpander (turbo expander generator) at GDS of Severodonetsk, and at GDS of Zaporozhye was performed supply of the equipment.

UTDU connecting diagrams

Main advantages of electric power stations based on UTDU:

• incremental cost of potential power, created by UTDU, is approximately 3 times less, then at creating of similar powers by traditional gas or steam turbines
• heat input per 1 kW of produced electrical power is 2-3 times less than heat expenses in steam- and gas turbine units
• gas economy (relative) to 60%
• full absence of solid emissions, emissions of nitrogen oxides and sulfur into the atmosphere and emptying of process waters
• efficiency factor is 0.7 to 0.8
• short terms of payback - 2.5 to 5 years