Year-end Sale % OFF 
Abstract
The need to develop renewable heat sources for domestic space heating is a well known problem, for solar thermal systems mismatch between generation and load is a major issue, and thermochemical interseasonal heat storage offers a solution to this problem. Recent research has shown that using an absorbent material as a host for salt hydrates can be advantageous in achieving a high energy density material while alleviating the problematic practical characteristics, such as agglomeration, which salt hydrates typically possess. In this paper results are presented for a 13X molecular sieve which was tested to determine its potential for interseasonal domestic thermochemical energy storage alone and as a host material for Magnesium Sulfate (MgSO4). Two different impregnation preparation methods have been utilised in our experiments, (i) a wetness impregnation method and (ii) a new method in which 13X molecular sieve powders and MgSO4 are formed into pellets with use of a binder. The materials produced by each method were tested against each other and compared to a zeolite-Y material to assess which is the best candidate material for thermal energy storage. The impact of ion exchange on the energy storage potential of the 13X materials was also investigated. Analysis of the materials characteristics and thermal performance was conducted using a Differential Scanning Calorimeter (DSC), Thermogravimetric Analyser (TGA) coupled with a Residual Gas Analyser (RGA), Scanning Electron Microscope (SEM) with Energy Dispersive X-ray (EDX) spectroscopy and a custom built fixed bed 200g in-situ hydration and dehydration chamber to assess the materials performance on a larger scale. The results demonstrate that the thermochemical storage potential of the 13X molecular sieve was enhanced following a Mg2+ ion exchange process, resulting in a maximum increased energy storage of approximately 14% (65J/g) compared to standard non treated 13X pellets.
Highlights
26% of the UK’s primary energy consumption is used for domestic space heating (DSH) and domestic hot water (DHW) production [1]
The research presented in this paper investigates MgSO4 which has been impregnated within two different absorbent materials (13X molecular sieve and zeolite-Y)
The endothermic heat flow is due to the enthalpy required for dehydration and the sensible heat required for heating the samples up to 150 °C
Summary
26% of the UK’s primary energy consumption is used for domestic space heating (DSH) and domestic hot water (DHW) production [1]. The amount of energy utilised from renewable sources can be increased by effective Thermal Energy Storage (TES). Supplied from renewable sources is low (i.e. thermal energy demand is high in the winter and low in the summer), TES can be used to bridge the gap between supply and demand [3,4,5]. In STES a material is heated and the material is subsequently stored (i.e. water, rock, concrete [6,7]) at an elevated temperature by an insulated container. In LTES the storage material is heated or cooled above or below its phase change temperature taking advantage of the energy absorbed or released during the phase transition
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
