Experimental Study of a Triple Concentric Tube Heat Exchanger Integrated into a Wood-Based Air-Heating System for Energy-Efficient Dwellings

Energies

Pierre Peigné²  Christian Inard¹ 

[1] LaSIE (Laboratoire des Sciences de l’Ingénieur pour l’Environnement), Department of Civil Engineering, University of La Rochelle, 17042 La Rochelle, France;CERIC Laboratory (Centre d’Essais et de Recherche des Industries de la Cheminée), Poujoulat Group, 79270 Saint-Symphorien, France; E-Mails:

关键词: low energy building;    air heating system;    wood pellet stove;    heat recovery ventilation;    triple concentric tube heat exchanger;    experiments;   

DOI  :  10.3390/en6010184

来源: mdpi

【 摘 要 】

In this paper, experimental tests conducted on a new wood-based air-heating system for energy-efficient dwellings are presented. The main objective is to evaluate the resulting outlet temperatures and the amount of heat recovered by the ventilation air in order to assess feasibility and performance of coupling a mechanical ventilation heat-recovery unit and a triple concentric tube heat exchanger integrated into the chimney of a room-sealed wood-pellet stove to heat an entire house. After introducing the context of this work, the three main components of the combined system developed here, the coupling configuration adopted, as well as the protocol used and the sensors implemented on an experimental setup carried out in a laboratory are detailed in turn. Then, the heat transfer rates obtained from measurements for the various fluids as well as the effectiveness of the heat exchangers are presented and discussed. Finally, the resulting outlet temperatures of the three fluids exchanging in the triple concentric tube heat exchanger studied here are compared to those provided by analytical solutions obtained with a mathematical model. It is shown that heat transfer rates are predicted with a relative difference that is lower than 5% compared to experimental values and that such a system enables to cover all or most of heat losses in an energy efficient building.

【 授权许可】

CC BY   
© 2013 by the authors; licensee MDPI, Basel, Switzerland.