Manual heating, thermal cutting and gouging

... during initial period of wood drying Model Model o Temperature ( C) 58 54 50 46 1. 00 1. 01 1.03 1. 04 1. 05 1. 06 1. 08 1. 09 1. 10 1. 12 Distance from centre (mm) (Graph taken from Zhang and Datta (2004), ... self -heating of wood chars 1. 3 Scope of work Taking into consideration of the above objectives, the focus of this thesis is on thermal combustion a...

Ngày tải lên: 14/09/2015, 14:14

... primary wood degradation mechanisms of such description is based on Shafizadeh and Chin (1977) work which expresses the decomposition as k1 WOOD → TAR (2. 22) k2 WOOD → GAS (2. 23) k3 WOOD → CHAR (2. 24) ... exp(− K / Ts ) pv , sat where K1 and (2. 8) K are constants which depend on the temperature range, and K1 4.143 ×1010 Pa and K = 4 822 K in the temperature range of...

Ngày tải lên: 14/09/2015, 14:14

... and erratic velocity profile   S-curve temperature profile  COUPLED VELOCITY AND TEMPERATURE DEVELOPMENT IN SELF -HEATING Figure 3. 1: Salient features of porous models for low- temperature long- term ... a factor of has been applied onto the porosity of green wood to derive the porosity of preburn wood, since pre-burn wood in this study has a 50% degree of...

Ngày tải lên: 14/09/2015, 14:14

... λ s λ (4. 47) Substituting Equations (4. 46) and (4. 47) into Equation (4. 45) yields C1 as C1 = Substituting Equation (4. 48) and H =  ′′ qe (4. 48)  s  + h s k  λ  h into Equation (4. 46), then ... 10 644 6 24 640 640 636 6 24 708 652 628 6 64 External heat flux &e q′′ (kW m-2) 50a 40 a 30a 25a 20a 15b 11c 10c 9c 8c Time to ignition tig (hr:min:s) 0:0:26 0:0: 54 0:1 :48 0:...

Ngày tải lên: 14/09/2015, 14:14

... a ratio of 1:100 (see Figures 5. 5 and 5. 6.) Discs 12.7 mm diameter and mm thick (see Figures 5. 7 and 5. 8) were pressed in a vacuum KBr press (Perkin-Elmer) at 100,000 psi Figure 5. 5 Wood samples ... grinding the wood discs sliced from the wood blocks and sieved to the desired particle size of 200 to 300 μm The wood powders were stored at 50 %RH at 23°C in a...

Ngày tải lên: 14/09/2015, 14:14

... 6. 2 Heat and mass transfer in porous slab Self -heating and spontaneous combustion of wood was studied using wood cube of critical size exposed to low- temperature, long- term heating in an isothermal ... 25 20 15 11 10 26 54 108 324 764 3222 7990 7554 463 .01 465 .70 431. 06 4 36. 06 402. 16 367 .60 315. 26 298.38 266 .5 373.4 374.9 375.9 373.9 460 .5 345.4 3...

Ngày tải lên: 14/09/2015, 14:14

... the body of knowledge on thermal combustion and oxygen chemisorption of wood in the following areas: evaporation, liquid water transport, role of moisture in thermal combustion and oxygen chemisorption ... addition to thermophysical approach to examine self -heating and spontaneous combustion of low- temperature, long- term preheated wood, targeted...

Ngày tải lên: 14/09/2015, 14:14

... organisms as feed for the developing larvae The aim of the present manual was therefore to review and summarise the latest developments concerning the production and use of the major live food organisms ... also the production and use of live food organisms as feed for the developing larvae The present manual describes the major product...

Ngày tải lên: 15/12/2013, 00:15

... - - Urea 7.5 - 1 2- 1 5 - 1 0-1 5 Calcium superphosphate 25 15 50 - - - Clewat 32 - - - - - N:P 16 /20 fertilizer - - - 1 0-1 5 - - N:P:K 1 6 -2 0 -2 0 - - - - 1 2- 1 5 - N:P:K 1 4-1 4-1 4 - - - - - 30 2. 3.1 .2 ... 7. 92 Algal-1 4.11 32. 22 8.83 8.65 Walne 4.04 13.37 13 .22 22 .28 ES 4...

Ngày tải lên: 15/12/2013, 00:15

... - 150 0. 53 53 - 80 150 - 200 0.47 70 - 93 200 - 250 0.40 80 - 100 250 - 30 0 0 .37 92 - 110 30 0 - 35 0 0 .33 100 - 117 35 0 - 400 0 .30 105 - 120 400 - 450 0.27 107 - 120 450 - 500 0. 23 105 - 117 > ... Upscaling of stock cultures to starter cultures 3. 5 .3. 3 Mass production on algae 3. 5 .3. 4 Mass productio...

Ngày tải lên: 15/12/2013, 00:15

... A par Basra - - Dayala - - Mahmoodia - - Urmia Lake B A urm Schor-Gol - - Shurabil - - Athlit - - Eilat North P A par Eilat South - - Chang Dao - - Tamano - - Yamaguchi P A par - - India Madras ... specific and remain relatively constant, (i.e they have become genotypical as a result of long-term adaptations of the strain to...

Ngày tải lên: 15/12/2013, 00:15

... weeks, the use of decapsulated cysts constitutes a saving of over one third in the amount of Artemia cysts used, compared to the use of live nauplii Table 4.2.4 The proximate composition (in % of ... valorization of an otherwise inferior product The cysts have the appearance and the practical advantages of a dry feed and, in contrast to Artemia nauplii (47...

Ngày tải lên: 15/12/2013, 00:15

... 2 0-2 3 3. 0-4 .3 3-1 1 5-7 2 4-2 7 1 4-1 7 7-1 0 1 7-2 0 1 0-1 5 2 8-2 9 2-5 3 0-3 4 20 1 0-1 5 1 0-1 5 3 5-3 7 20 2 0-3 0 3 8-4 1 0.05 20 3 0-4 0 Start of weaning 2 0-1 5 1 5-1 0 4 5-5 5 1 5-2 5 1 0-0 0.08 4 0-5 0 4 5-5 5 4 5-5 5 For example, ... P monodon PL-15 and the osmotic resistance of PL-10 This has recently been confirmed...

Ngày tải lên: 15/12/2013, 00:15

... and attractive for the predators Table 4.4.3 Artificial seawater formulations used for tank production of Artemia (ing.l-1) For the Dietrich and Kalle formulation, solutions A and B are prepared ... influence the feeding behavior of Artemia by affecting the filtration rate, ingestion rate and/ or assimilation: including the quality and quantity of the food...

Ngày tải lên: 15/12/2013, 00:15

... copepods and is also very toxic for shrimp The degradation of rotenone, chlorine and CaO to non-toxic forms is fairly rapid (24 - 48 h) If on the other hand tea-seed cake or dipterex are used, ponds ... accumulates on the pond bottom, they should only be used for a limited period of time Recommended levels of organic manure are 0.5 to 1.25 ton.ha-1 at the start...

Ngày tải lên: 15/12/2013, 00:15