Abo Bibliothek: Guest

ISSN Online: 2377-424X

ISBN Print: 978-1-56700-474-8

ISBN Online: 978-1-56700-473-1

International Heat Transfer Conference 16
August, 10-15, 2018, Beijing, China

THERMAL ANALYSIS AND OPTIMISATION OF A LATENT HEAT STORAGE SYSTEM WITH PARALLEL PIPES AS HEAT EXCHANGERS

Get access (open in a dialog) DOI: 10.1615/IHTC16.mpf.025099
pages 6393-6401

Abstrakt

Latent heat storage with Phase Change Materials (PCMs) has been widely used due to its isothermal nature with a large heat capacity. In the current study, a latent heat storage system is designed based on the heat exchanger effectiveness method. Several parallel pipes are used to form a selection of heat exchangers for heat storage and release process. To minimise its charging process time and maximise heat storage effectiveness, a parametric analysis is conducted on multiple influencing factors, including inlet temperatures, flow rates of Heat Transfer Fluid (HTF) and heat transfer pipe diameters. Flow rates were shown to have a lesser effect on thermal performance than inlet temperatures. Increasing the inlet flow rate reduces the charging time but reduces heat storage effectiveness. The main thermal resistance of the system arises from the low thermal conductivity of the PCM; therefore, the system performance should be enhanced by improving the PCM thermal conductivity. The pipe diameter also has a significant effect on the thermal performance due to a varied pattern of the resulting pipe flow.