Energy storage coefficient calculation

How is heat loss coefficient determined in ice storage?

The available energy of each ice storage was determined by the fraction of ice stored in the vessel. The heat loss coefficient was determined using an optimisation algorithm. Using this approach it was possible to determine the heat loss coefficients occurring at different layers of the storage.

Can heat loss coefficients be calculated for seasonal storage?

The calculation of heat loss coefficients is critical for modelling seasonal storage. This paper details the use of piece-wise linear regression and non-linear optimisation to determine the heat transfer properties of two ice thermal stores of different volumes (85 m 3 and 11 m 3).

What is coefficient of performance in ice thermal storage?

When an ice thermal storage is cycled daily to shift the demand, the coefficient of performance (COP) is often used to analyse the performance of the system. Luo et al. used monitored data to calculate the COP of different system elements to minimize the operational costs of cooling a shopping mall .

How is heat loss coefficient determined?

The heat loss coefficient was determined using an optimisation algorithm. Using this approach it was possible to determine the heat loss coefficients occurring at different layers of the storage. Validation of the approach yielded a relative mean error of 5.4% and 3.8% for the 85 m 3 and 11 m 3 storage respectively.

What are the possible values of energy storage capacity and wind power capacity?

As a result, the possible values of energy storage capacity can be: E = 0, Δ E, 2Δ E, 3Δ E, , m Δ E; similarly, the possible values of wind power capacity can be: Pwn = 0, Δ P, 2Δ P, 3Δ P, , n Δ P. m and n limit the maximum value of energy storage capacity and wind power capacity, respectively.

What is the overall heat transfer coefficient?

The overall heat transfer coefficient Γ is the key parameter determining the heat transfer rate between the PCM and water. It describes how fast the energy is transferred between the two materials. The parameter is depended on the design of the internal heat exchanger, the operating condition, and the materials.