Energy storage pressure drop

How important is pressure drop in packed bed thermal energy storage?

The significant energy consumption for overcoming the pressure drop in packed beds, makes the optimal design of such systems crucial. Particularly, pressure drop is of great importance for energy storage efficiency of the sensible , latent , and packed bed thermal energy storage (TES) systems .

What is pressure drop?

Pressure drop occurs as the compressed air travels through the treatment and distribution system. A properly point of use. Excessive pressure drop will result in poor system performance and excessive energy consumption.

Why is pressure drop important in adsorber bed?

High pressure drop in ATES results in the use of electric fans, which increases the power consumption, and consequently decreases the energy storage efficiency . This makes detailed study of pressure drop in the adsorber bed and optimum design of the bed crucial to promote widespread adoption of open ATES.

Why is the pressure drop calculation of Packed beds non-linear?

The non-linearity, due to high flow speed, was introduced by Ergun in the pressure drop calculations of packed beds . Moreover, the effect of porosity variation was taken into account in the pressure drop calculation of packed beds with low bed-to-particle diameter ratios, by correcting the Ergun’s equation , .

Does water uptake affect pressure drop?

The experiment reveals negligible effect of water uptake on pressure drop. The model shows slight change in pressure drop due to heat of adsorption. Adsorption thermal energy storage has received considerable attention as it can overcome the mismatch between supply and demand of renewables, providing high energy storage per volume.

How to measure pressure drop along a porous packed bed?

To measure the pressure drop along the porous packed bed, a differential pressure transducer (Setra-267w) with accuracy of ±1.0% full scale (±12.5 Pa) was used. The pressure drop was measured for the packed bed with different silica gel heights of 6, 12, 18, 24, and 30 cm. Fig. 2.