Performance of conical ammonia dissociation reactors for solar thermochemical energy storage

Chen Chen, Yi Liu, Hamarz Aryafar, Tao Wen and Adrienne S. Lavine

Applied Energy, 2019, vol. 255, issue C

Abstract: Solar thermochemical energy storage cannot only have a high energy density but the capability of storing energy at ambient temperature with little heat loss. Recently, lots of research has been done to advance the heat recovery process of an ammonia synthesis system in the context of ammonia-based solar thermochemical energy storage. However, there has not been much enhancement proposed to improve the conversion of the ammonia dissociation reactor, which determines the solar energy absorbed. This paper explores the effects of geometry and configuration on the conversion of ammonia dissociation reactors. A two-dimensional pseudo-homogeneous model has been developed to simulate reaction kinetics and thermodynamics in conical as well as cylindrical ammonia dissociation reactors. The model has been validated by comparing model-predicted and experimentally measured reactor wall temperature profiles and conversions. The effect of the configuration, i.e., cylindrical, diverging and converging, on reactor performance has been investigated. The results show that converging reactors can achieve a higher conversion with a fixed preheating heat exchanger, i.e., a 5.3% increase in the conversion with less than a 1° slope in the tube wall.

Keywords: Concentrating solar power; Thermochemical energy storage; Ammonia dissociation; Conical reactor (search for similar items in EconPapers)
Date: 2019
References: Add references at CitEc
Citations: View citations in EconPapers (7)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0306261919314722
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:appene:v:255:y:2019:i:c:s0306261919314722

Ordering information: This journal article can be ordered from
http://www.elsevier.com/wps/find/journaldescription.cws_home/405891/bibliographic
http://www.elsevier. ... 405891/bibliographic

DOI: 10.1016/j.apenergy.2019.113785

Access Statistics for this article

Applied Energy is currently edited by J. Yan

More articles in Applied Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().