Next Article in Journal
The Influence of Allocation on the Carbon Footprint of Electricity Production from Waste Gas, a Case Study for Blast Furnace Gas
Next Article in Special Issue
Idle Operation with Low Intake Valve Lift in a Port Fuel Injected Engine
Previous Article in Journal
Improved Control Strategy for DFIG Wind Turbines for Low Voltage Ride Through
Previous Article in Special Issue
Numerical Model of a Variable-Combined-Cycle Engine for Dual Subsonic and Supersonic Cruise
Energies 2013, 6(3), 1198-1216; doi:10.3390/en6031198
Article

Experimental and Numerical Study on the Thermal Performance of a Water/Steam Cavity Receiver

, *  and
Received: 26 September 2012; in revised form: 7 December 2012 / Accepted: 24 January 2013 / Published: 25 February 2013
(This article belongs to the Special Issue Combined Heat and Power – Strategy and Practice)
Download PDF [1619 KB, uploaded 25 February 2013]
Abstract: An experimental platform was designed and built for testing the thermal performance of a water/steam cavity receiver. The experimental platform was utilized to investigate the start-up performance and operation characteristics of the receiver. The electrical heating mode was chosen to simulate the non-uniform distribution of heat flux on the surface of absorber tubes inside the cavity. During start-up the temperature rise rate and the mass flow rate are considered as control variables. A couple of start-up curves under different working pressures were finally obtained. The results showed that the receiver performed at relatively low thermal efficiencies. The main reason for the low thermal efficiency was attributed to the low steam mass flow rate, which causes a high proportional heat loss. In order to study the relationship between thermal efficiency and mass flow rate, a computational model for evaluating the thermal performance of a cavity receiver was built and verified. This model couples three aspects of heat transfer: the radiative heat transfer inside the receiver, the flow boiling heat transfer inside the absorber tubes and the convection heat transfer around the receiver. The water/steam cavity receiver of the experimental platform was studied numerically. The curve of thermal efficiency versus mass flow rate was obtained to show that the thermal efficiency increases with increasing mass flow rate within a certain range, and the increase is more remarkable at low mass flow rates. The purpose of the present study was to determine an appropriate mass flow rate for the receiver of the experimental platform to ensure its efficient operation.
Keywords: cavity receiver; thermal performance; start-up; mass flow rate cavity receiver; thermal performance; start-up; mass flow rate
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Export to BibTeX |
EndNote


MDPI and ACS Style

Tu, N.; Wei, J.; Fang, J. Experimental and Numerical Study on the Thermal Performance of a Water/Steam Cavity Receiver. Energies 2013, 6, 1198-1216.

AMA Style

Tu N, Wei J, Fang J. Experimental and Numerical Study on the Thermal Performance of a Water/Steam Cavity Receiver. Energies. 2013; 6(3):1198-1216.

Chicago/Turabian Style

Tu, Nan; Wei, Jinjia; Fang, Jiabin. 2013. "Experimental and Numerical Study on the Thermal Performance of a Water/Steam Cavity Receiver." Energies 6, no. 3: 1198-1216.


Energies EISSN 1996-1073 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert