Booth Id:
ET305
Category:
Engineering Mechanics
Year:
2014
Finalist Names:
Jumshudlu, Lala
Mursagulova, Madina
Abstract:
Energy storage in liquid air.
According to statistical research, based on an open data analysis, the average
Thermal Power Electrical Station loses up to 40 per cent of generated energy,
because of energy accumulation methods’ inefficiency. The solution is to
introduce the cryogenic energy storage system.
In the engineering laboratory of a university we constructed a
prototype of the cryo system.We compressed the air under the pressure of 8 bar
in the volume of 3 l and temperature of 293 K. Maximal amount of gas that can be
compressed isochorically is 1,02 M- that is 22,848 L of air (given conditions).
Further, we gradually filled the air container with oil and pumped the gas out to
turn Gas Generator turbine (average speed of gas was 1,95 m/s). The outcome
energy was 1829,0232 J what is 51% of energy used to increase internal energy
(3586,32 J).So, this method will be able to save 50% of accumulated energy.
The next point, on which we focused, was Gas cooling system. First, the industrial
compression process should be divided into stages. At each stage Gas should be
first compressed and ,subsequently, cooled. It is known fact that
isothermiccompression saves up to 30% of energy. Second, the system of
throttles will able also to cool the Gas. Additionally, if throttle system is consists
of vessels that transport cooling agent (Nitrogen phase of air can be used as
cooling agent), the effect doubles.
The cryogenic system in whole is more efficient and ecologically approved than
any other accumulation methods.