CBSE- REGIONAL SCIENCE EXHIBITION(2025-26)

 GREEN ENERGY

our school students  Rahul. P.K and Prahalad Shree Haree  of class VII participated in the CBSE REGIONAL SCIENCE EXHIBITION (VI -VIII category) held at RMK senior secondary school, Thiruverkadu on 19.11.2025 and 20.11.2025 on the below topic with the sub theme as Green Energy.

Eco friendly Power Storage device with Liquid Oxygen (LOX battery)

LOX BATTERY

Liquid oxygen when it in liquid state, the volume of 1 Litre, will expand up to approximately 860L, when it becomes a gas.

Power storage:

In this battery oxygen liquification is the power storage ,Oxygen Gas can be liquefied at a temperature of minus 183° Celsius and a pressure of 51.4 kg/cm².

Discharge:

It can be easily discharged by open one valve with one touch. 

WORKING COMPONENTS

Heat Exchanger Based Oxygen Chillness Remover

When liquid oxygen passes through an open-close valve, the oxygen transitions to a gaseous form. This transition significantly increases chilling effects, this may cause stuck up in pressure regulator, Flow Control Valve, and Air Motor. Therefore, this residue should be eliminated and The generated chilling effect can be redirected to the vehicle’s interior cooling ,as well as, we used to cold storage device (such as a freezer box).

Pressure Regulator

The liquid oxygen is already stored at 51.4 kg/cm^2 of pressure, This regulator allows us to control the pressure which is required, based on the load requirements .Less load requires less pressure, and more load requires more pressure. This concept is used to avoid power loss in the battery, and achieve good efficiency.

Flow Control Valve

The flow control valve is used to, control the speed of the air motor “Less speed, less flow; more speed, more flow “concept is used to reduce energy loss when the vehicle is locked in traffic and moving slowly on roads.

Air Motor:

The Air Motor features a low-leak, positive-movement design. It can be used to reduce energy loss and smooth ride.

An air motor has two ports ,one lets the air in to make the motor turn, and the other lets the air out.

Drive Gearbox:

The Drive Gearbox is used to strengthen the Air Motor, and also used to change the direction (forward/reverse) of the vehicle

Cost of the raw material and production process

Even though the cost of liquid oxygen costly, the raw material of liquid oxygen is distilled water, it is cheaper, One litre distilled water contains 889 grams of oxygen and 111 grams of hydrogen. A mass production and co-ordinate process make, liquid oxygen and liquid hydrogen making process very cheaper. Instead of liquid oxygen we can be used liquid hydrogen In our battery

Result

Triple Advantage:

1.The LOX battery is superior: It’s eco-friendly, long-lasting, compact, lightweight and it works long life.

2.A remarkable advantage of this battery is its high performance, as more than 95% of the energy invested during charging—which is stored in the form of high pressure and extreme cold—is recovered when the battery is discharged. This high level of performance signifies it is an excellent battery.”

3.Hydrogen and oxygen constitute an eco-friendly fuel source. Should we design or employ an engine operates by hydrogen and oxygen, which is released by our air motor, then this engine 'senergy potentially be utilized to reproduce the liquid hydrogen and liquid oxygen