Abstract
The paper describes different aspects of porous combustion reactor operation especially at cold start conditions. Under cold start conditions it is necessary to increase the internal energy of the combustion reactor, to accumulate enough energy inside its solid phase and to reach at least the ignition temperature on the reactors inner surface. The most practicable method to preheat a cold porous reactor is to use its surface as a flame holder and to apply free flame combustion as a heat source for the preheating process. This paper presents a new electrically heated ignition element, which gets integrated in a three dimensional macro-cellular SiSiC reactor structure. For the development of the ignition element it was assumed, that the element is made of the same material as the combustion reactor itself and is fully integrated within the three-dimensional macro-cellular structure of the combustion reactor. Additive manufacturing like three-dimensional (3D) printing permits the production of regular SiSiC structures with constant strut thickness and a defined current flow path. To get a controlled temperature distribution on the ignition element it is necessary to control the current density distribution in the three-dimensional macro-cellular reactor structure. The ignition element used is designed to be an electrical resistance in an electric current system, converting flowing current into heat with the goal to get the highest temperature in the ignition region (glow plug). First experiments show that the ignition element integrated in a combustion reactor exhibits high dynamics and can be heated to the temperatures much above 1000 °C in a very short time (approx. 800 ms) for current of I = 150 A.
| Original language | English |
|---|---|
| Pages (from-to) | 1557-1565 |
| Number of pages | 9 |
| Journal | Applied Thermal Engineering |
| Volume | 112 |
| DOIs | |
| Publication status | Published - 5 Feb 2017 |
Fingerprint
Keywords
- Cold start of porous reactor
- Combustion in reactor
- Integrated ignition element
- Macro-cellular reactors
ASJC Scopus subject areas
- Energy Engineering and Power Technology
- Industrial and Manufacturing Engineering
Cite this
Electrically heated 3D-macro cellular SiC structures for ignition and combustion application : This paper is dedicated to Prof. Dr. Miroslaw Weclas, a co-author, colleague and friend who sadly passed away prior to completion of this publication and whose inspiration remains with us. / Falgenhauer, Ralf; Rambacher, Patrick; Schlier, Lorenz; Volkert, Jochen; Travitzky, Nahum; Greil, Peter; Weclas, Miroslaw.
In: Applied Thermal Engineering, Vol. 112, 05.02.2017, p. 1557-1565.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Electrically heated 3D-macro cellular SiC structures for ignition and combustion application
T2 - This paper is dedicated to Prof. Dr. Miroslaw Weclas, a co-author, colleague and friend who sadly passed away prior to completion of this publication and whose inspiration remains with us
AU - Falgenhauer, Ralf
AU - Rambacher, Patrick
AU - Schlier, Lorenz
AU - Volkert, Jochen
AU - Travitzky, Nahum
AU - Greil, Peter
AU - Weclas, Miroslaw
PY - 2017/2/5
Y1 - 2017/2/5
N2 - The paper describes different aspects of porous combustion reactor operation especially at cold start conditions. Under cold start conditions it is necessary to increase the internal energy of the combustion reactor, to accumulate enough energy inside its solid phase and to reach at least the ignition temperature on the reactors inner surface. The most practicable method to preheat a cold porous reactor is to use its surface as a flame holder and to apply free flame combustion as a heat source for the preheating process. This paper presents a new electrically heated ignition element, which gets integrated in a three dimensional macro-cellular SiSiC reactor structure. For the development of the ignition element it was assumed, that the element is made of the same material as the combustion reactor itself and is fully integrated within the three-dimensional macro-cellular structure of the combustion reactor. Additive manufacturing like three-dimensional (3D) printing permits the production of regular SiSiC structures with constant strut thickness and a defined current flow path. To get a controlled temperature distribution on the ignition element it is necessary to control the current density distribution in the three-dimensional macro-cellular reactor structure. The ignition element used is designed to be an electrical resistance in an electric current system, converting flowing current into heat with the goal to get the highest temperature in the ignition region (glow plug). First experiments show that the ignition element integrated in a combustion reactor exhibits high dynamics and can be heated to the temperatures much above 1000 °C in a very short time (approx. 800 ms) for current of I = 150 A.
AB - The paper describes different aspects of porous combustion reactor operation especially at cold start conditions. Under cold start conditions it is necessary to increase the internal energy of the combustion reactor, to accumulate enough energy inside its solid phase and to reach at least the ignition temperature on the reactors inner surface. The most practicable method to preheat a cold porous reactor is to use its surface as a flame holder and to apply free flame combustion as a heat source for the preheating process. This paper presents a new electrically heated ignition element, which gets integrated in a three dimensional macro-cellular SiSiC reactor structure. For the development of the ignition element it was assumed, that the element is made of the same material as the combustion reactor itself and is fully integrated within the three-dimensional macro-cellular structure of the combustion reactor. Additive manufacturing like three-dimensional (3D) printing permits the production of regular SiSiC structures with constant strut thickness and a defined current flow path. To get a controlled temperature distribution on the ignition element it is necessary to control the current density distribution in the three-dimensional macro-cellular reactor structure. The ignition element used is designed to be an electrical resistance in an electric current system, converting flowing current into heat with the goal to get the highest temperature in the ignition region (glow plug). First experiments show that the ignition element integrated in a combustion reactor exhibits high dynamics and can be heated to the temperatures much above 1000 °C in a very short time (approx. 800 ms) for current of I = 150 A.
KW - Cold start of porous reactor
KW - Combustion in reactor
KW - Integrated ignition element
KW - Macro-cellular reactors
UR - http://www.scopus.com/inward/record.url?scp=84995489600&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84995489600&partnerID=8YFLogxK
U2 - 10.1016/j.applthermaleng.2016.10.066
DO - 10.1016/j.applthermaleng.2016.10.066
M3 - Article
AN - SCOPUS:84995489600
VL - 112
SP - 1557
EP - 1565
JO - Applied Thermal Engineering
JF - Applied Thermal Engineering
SN - 1359-4311
ER -