The Influences of Various Testing Conditions on the Evaluation of Household Biomass Pellet Fuel Combustion

Zhang, Yixiang; Zhang, Zongxi; Zhou, Yuguang; Dong, Renjie

doi:10.3390/en11051131

Cited by 20 publications

(13 citation statements)

References 29 publications

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“…In the case of pellets modified with lime from the second research period, ash generation amounted to 1.91-9.71% (average of 2.98% ± 0.95%), and the calorific value was 16.32-20.70 MJ·kg −1 (average of 18.83 ± 0.78 MJ·kg −1 ). The calorific values obtained were similar to those reported by other authors for pellets made from wood mass [33][34][35]. Some authors reported a higher calorific value for wood pellets of 20.3-20.8 MJ·kg −1 , with significantly lower ash generation of 0.27-0.39%.…”

Section: Biomass Propertiessupporting

confidence: 88%

“…Emissions of pollutants into the atmosphere strongly depend on both the type of biomass used as fuel and the combustion conditions [6,17]. Zhang et al [34] noted highly varied CO emissions in a wide range of 43-201 g·kg −1 for pellets under different combustion conditions. In the context of the results of this study, this particular element seems to be important.…”

Section: Analysis Of the Combustion Process For Emissionsmentioning

confidence: 99%

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The Use of Plant Biomass Pellets for Energy Production by Combustion in Dedicated Furnaces

et al. 2020

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Biomass combustion is technologically difficult. It is also problematic because of the necessity to manage the ash that is generated in the process. The combustion of biomass pellets is optimum when their moisture is 6-8%. The calorific value of pellets made from straw and willow wood (4:1) was 17.3-20.1 MJ·kg −1 . There were serious problems with burning this material caused by the accumulation and melting of bottom ash on the grate, which damaged the furnace. These problems with optimizing the biomass combustion process resulted in increased CO emissions into the atmosphere. It was shown that pelletization could also be used to consolidate the ash generated during the combustion process, which would eliminate secondary dust during transport to the utilization site. For this purpose, it was suggested to add binding substances such as bentonite and bran. The analysis showed that an optimum material for pelletization should contain, on average, 880 g of ash, 120 g of bentonite, 108 g of bran, and 130 g of water.

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Section: Biomass Propertiessupporting

confidence: 88%

Section: Analysis Of the Combustion Process For Emissionsmentioning

confidence: 99%

The Use of Plant Biomass Pellets for Energy Production by Combustion in Dedicated Furnaces

et al. 2020

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“…Straws are produced in farmlands. Based on the principle of rural energy utilization, straws and biomass pellet can be used for heating and cooking by farmers [75,76]. Compared with small-size straw formed particles, the bundled straws can be used for heat supply in rural areas at low costs (1.53-2.05 $•m −2 ) [53].…”

Section: Characteristics Of Straw Blocks For Fuelmentioning

confidence: 99%

Optimization of Cold Pressing Process Parameters of Chopped Corn Straws for Fuel

Chen

Zhang

et al. 2020

Energies

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Pressed condensation is a key process before the reclamation of loose corn straws. In this study, the effects of stabilization time on the relaxation density and dimensional stability of corn straws were studied firstly, and then the stabilization time was determined to be 60 s by comprehensively considering the compression effect, energy consumption, efficiency and significance. On this basis, the effects of the water content (12%, 15%, 18%), ratio of pressure maintenance time to stabilization time (0, 0.5, 1), maximum compression stress (60.4, 120.8, 181.2 kPa) and feeding mass (2.5, 3, 3.5 kg) on the relaxation density, dimensional stability coefficient, and specific energy consumption of post-compression straw blocks were investigated by the Box–Behnken design. It was found that the water content, ratio of pressure maintenance time to stabilization time, maximum compression stress, and feeding mass all very significantly affected the relaxation density, dimensional stability coefficient and specific energy consumption. The interaction between water content and maximum compression stress significantly affected both relaxation density and specific energy consumption. The interaction between the ratio of pressure maintenance time to stabilization time and feeding mass significantly affected the dimensional stability coefficient. The factors and the indices were regressed by quadratic equations, with the coefficients of determination larger than 0.97 in all equations. The optimized process parameters were water content of 13.63%, pressure maintenance time of 22.8 s, strain maintenance time of 37.2 s, maximum compression stress of 109.58 kPa, and raw material feeding mass of 3.5 kg. Under these conditions, the relaxation density of cold-pressed straw blocks was 145.63 kg/m3, the dimensional stability coefficient was 86.89%, and specific energy consumption was 245.78 J/kg. The errors between test results and predicted results were less than 2%. The low calorific value of cold-pressed chopped corn straw blocks was 12.8 MJ/kg. Through the situational analysis method based on the internal and external competition environments and competition conditions (SWOT analysis method), the cold-pressed chopped corn straw blocks consumed the lowest forming energy consumption than other forming methods and, thus, are feasible for heating by farmers. Our findings may provide a reference for corn straw bundling, cold-press forming processes and straw bale re-compressing.

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“…The ending points did not have significant effects on thermal efficiency and the carbon dioxide emission factor but did affect particulate matter emission. A relatively lower chamber height demonstrated a better performance on thermal metrics [17].…”

Section: Introductionmentioning

confidence: 95%

“…Aziz et al developed an innovative study using a fluidized bed dryer with superheated steam and its integration into a gasification-combined cycle system power generation [16]. Zhang et al evaluated the effects of various testing conditions on a top-lit forced-up-draft semi-gasifier cooking stove [17]. The investigation showed that using forced secondary air and more fuel tended to improve both thermal and gas emission performances.…”

Section: Introductionmentioning

confidence: 99%

An Experimental Technology of Drying and Clean Combustion of Biomass Residues

et al. 2018

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In the present study, the drying and combustion of solid biomass residues are developed. The combustion of the residues inside a boiler and a stove have been done. We used three types of solid biomass residues (i.e., cork, pine pellet and olive pomace). These residues have been dried by using screw dryers. Experimental installation has been used for a series of thermal drying tests of the residues by measuring the temperature inside the dryer and their moisture contents. A laboratory screw dryer was used to dry the olive pomace by using hot gases from a chimney of a biomass stove. Elemental and proximate analyses, as well as the higher heating value (HHV) of the raw materials, have been determined. In the experiments, moisture content variation of the residues and drying temperatures are obtained. These residues are dried several times under the same drying conditions to achieve the final moisture content rate. On the other hand, the temperature of combustion chamber of the boiler has been measured under different conditions. It has been found that by increasing hot gas temperature, the drying rate is increased. Finally, it has been found that the drying of these residues increases their calorific values and reduces the emissions.

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The Influences of Various Testing Conditions on the Evaluation of Household Biomass Pellet Fuel Combustion

Cited by 20 publications

References 29 publications

The Use of Plant Biomass Pellets for Energy Production by Combustion in Dedicated Furnaces

The Use of Plant Biomass Pellets for Energy Production by Combustion in Dedicated Furnaces

Optimization of Cold Pressing Process Parameters of Chopped Corn Straws for Fuel

An Experimental Technology of Drying and Clean Combustion of Biomass Residues

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