Title |
Indirect Fired Flat Radiant Panels |
Creator |
Kurek, Harry S.; Kune, Vladimir; Chudnovsky, Yaroslav P.; Touzet, Antonin; La Faire, Antoine de; Landais, Thierry; Erinov, Anatoly E.; Semernin, Aleksei M. |
Publisher |
Digitized by J. Willard Marriott Library, University of Utah |
Date |
1997 |
Spatial Coverage |
presented at Chicago, Illinois |
Abstract |
During the last two decades, global energy and market conditions have motivated the thermal processing industry to improve energy utilization in order to remain competitive. To meet these demands, research in the thermal processing industry has been directed toward one or more of the following: 1) improving process productivity, 2) improving process temperature uniformity, 3) improving product quality, 4) improving thermal efficiency, and 5) reducing air toxic emissions. The Institute of Gas Technology (IGT), Gaz de France (GDF) and the Gas Institute (GI) of the National Academy of Sciences of Ukraine have joined to demonstrate and commercialize a technology developed by GI - an indirect gas-fired, low-inertia/high-efficiency furnace - which is consistent with and meets all five of the criteria above. The base technology has been evaluated for the heat treatment of products in the machine manufacturing industries (for example, gears, bolts, shafts, etc.). The technology, however, might also be feasible for indirect-fired drying applications (for example, powder paint and paper). The unique design of the low-inertia furnace, that utilizes high thermal efficiency indirect-fired flat radiant panels, promotes high heat-up rates, excellent temperature uniformity, high thermal efficiency, and low emissions. Thus by applying this technology, the end user can benefit from increased productivity, improved part quality, reduced fuel consumption, emissions abatement, and reduced capital and operating costs. |
Type |
Text |
Format |
application/pdf |
Language |
eng |
Rights |
This material may be protected by copyright. Permission required for use in any form. For further information please contact the American Flame Research Committee. |
Conversion Specifications |
Original scanned with Canon EOS-1Ds Mark II, 16.7 megapixel digital camera and saved as 400 ppi uncompressed TIFF, 16 bit depth. |
Scanning Technician |
Cliodhna Davis |
ARK |
ark:/87278/s6bc424j |
Setname |
uu_afrc |
ID |
13946 |
Reference URL |
https://collections.lib.utah.edu/ark:/87278/s6bc424j |
Title |
Page 4 |
Format |
application/pdf |
OCR Text |
Show measured by Bourdon gauges at each panel. Cast-iron pigs were charged into the basket to simulate the load. Each pig weighs 30 kg (66 lb.) and is 360 m m (14 inch) in diameter. They were stacked in three rows from 4 to 6 pieces high. The load weights tested were 360 kg (794 lb.) and 540 kg (1190 lb.). The basket weight was 100 kg (220 lb.). The average furnace temperature (just below the furnace roof) and the temperature of the load at 9 points (4 points on each side of the basket and 1 point at the center of the load) were measured during the testing. The furnace is not equipped with a recirculation fan. Test and results The results of only four tests will be discussed here. The first test involved loading cold metal into a hot furnace [Tf = 780°C (1435°F)], while the next three tests involved heating the furnace with the load, both from ambient temperature to 720°C (I328°F), 860°C (1580°F), and 950°C (1742°F), respectively. All data from the furnace and the load were collected every 20 minutes. After the end of heatup and soaking, the natural gas was shut off simultaneously to all the panels. Cooling air at a rate of 200 m3/h (7062 ft3/h) was then supplied through the panels to cool down the load and the furnace. For faster cool down. the blower capacity can be increased. The ability to control the load cooling speed without using additional equipment is an important advantage of the LIF. The test conditions and the load heating test results are shown in Table 1, and Figures 3. 4, and 5. The natural gas consumption during the tests was 48 m3/h (1695 ft3/h). All tests were carried out with an air atmosphere and without a circulation fan. During heat up of the 540 kg (1190 lb) load to 940°C (1724°F), the temperature difference between the center of the load (T5) and its corners (Tl to T9) is increased during the initial 80 to 90 minutes to 200° to 250°C (392° to 482°F) at the upper points and to 70° to 110°C (158° to 230°F) at the lower points. The final temperature difference between the corners and the center of the load however, was only ±I0°C (±18°F). Utilization of a circulation fan together with a protective atmosphere can be expected to decrease this difference to ±5°C (±9°F). Table 1. Test conditions and results from Pilot scale LIF FURNACE TEMPERA TURE, °C Tbegin/Tend 780/830 20/720 20/820 20/940 HEATUP TIME, h 2.0 2.25 2.75 3.1 SOAK TIME, h - 1.75 1.25 1.15 Tr TOTAL TIME, h 2.0 4.0 4.0 4.25 ATmax* FORT// °C 300/180 195/95 115/100 220/1 10 ATmax* F O R TS °C ±12/±5 ±12/±7.5 ±l2/±5 ±10/±5 Tl -T2 T3-T4 T6-T7 T8-T9 °C ±10 ±10 ±7.5 ±5 AMOUNT OF GAS INPUT FORT//. m" 28.0 45.0 46.5 48.0 SPECIFIC HEAT INPUT.** kJ/kg 2750 3600 3750 3140 * Inside the furnace/Near the loading door **Excluding heat-up 4 |
Setname |
uu_afrc |
ID |
13938 |
Reference URL |
https://collections.lib.utah.edu/ark:/87278/s6bc424j/13938 |