Description

Presents a parametric analysis to evaluate the performance of an internal-melt ice-on-coil ice storage tank for various design configurations. In particular, the effects of variables, such as thermal conductivity of the coil material, tank capacity, and the longitudinal and transversal pitches are considered. In addition, an economic analysis is performed for different tank arrangements to determine optimum values for coil diameter and tank capacity. A numerical model based on a thermal network technique and validated experimentally is used to carry out the parametric analysis. The input parameters include secondary fluid inlet temperatures and flow rates of 29% by weight concentration mixture of ethylene glycol and water. Among the model output parameters analysed are the time variation of the secondary fluid heat transfer rates, the inventory of ice, and the secondary fluid pressure drop through the coils for both charging and discharging periods. It was found that the time required to charge and discharge the tanks can be reduced when optimal values of external coil diameters and thermal conductivities of the coil material – higher than those available commercially – are used.

Units: Dual

KEYWORDS: year 1997, Calculating, ice storage, performance, thermal conductivity, coils, tanks, capacity, fluid flow rate, heat flow, costs, economics

Citation: ASHRAE Transactions, Vol.103, Part 2, Boston 1997

Product Details

Published:

1997

Number of Pages:

12

File Size:

1 file , 1.4 MB

Product Code(s):

D-16478