Air energy storage heat exchanger

How effective is a heat exchanger?

As mentioned in Section 2.5, the effectiveness of heat exchanger is usually regarded as an ideal value in previous studies, that is, it is set to be equal in energy storage and energy release phases and is not affected by other parameters.

What is a gas-water heat exchanger?

Nevertheless, a group of gas–water heat-exchangers is used to cool the outlet air of the fifth-stage compressor down to an appropriate temperature to be rejected into an air storage tank, which better meets the design requirements of the air storage tank.

What is compressed air energy storage (CAES) technology?

INTRODUCTION Compressed air energy storage (CAES) technology could be used for conquering the fluctuation of renewable energy and addressing the need of the electricity market . Compared with traditional CAES, underwater compressed air energy storage (UWCAES) can keep the constant pressure of stored air.

How does a heat exchanger work?

During the compression, the hot air released from the compressor is cooled down by cold water from cooling heat-exchanger in the ambient tank, and then it is compressed at the next stage. The heated water from a cooling heat-exchanger is stored in the high-temperature tank.

Why is a heat exchanger important in a cryogenic system?

Heat exchangers are among the most important components de-termining the energy e ciency of cryogenic systems. They also constitute the necessary interface between a ffi LAES system and the industrial process utilizing the available cooling e ect.

How does pressure affect heat exchanger performance?

The pressure loss in the effectiveness of heat exchanger also affects heat exchanger performance. In addition, due to changes in the pressure in compressed air storage during energy storage and release process and changes in operating conditions, the air mass flow also changes, which also leads to changes in the effectiveness of heat exchanger.