Feasibility and performance analysis of utilizing spent mushroom substrate as biomass fuel




HIGHLIGHTS
  • What: This study investigated the effect of evaporation temperature and pre-drying moisture content on system performance.
  • Who: Liao Chen-hao and Hsieh Jui-Ching from the National Chin-Yi University of Technology, Department of Mechanical Engineering, Taichung City, Taiwan have published the paper: Feasibility and performance analysis of utilizing spent mushroom substrate as biomass fuel, in the Journal: (JOURNAL)
SUMMARY

    As global finite fossil fuel resources are gradually depleting, the development and research of biomass energy present a solution to mitigate the impacts of climate change. Typically, SMS has a high moisture content, making the process of drying for biomass fuel energy-intensive. The efficiency correlation is as outlined below: πœ‚π‘‘β„Ž= π‘Šπ‘’π‘™π‘’ +π‘„π‘π‘Ÿπ‘’π‘‘π‘Ÿπ‘¦ +π‘„π‘‘π‘Ÿπ‘¦π‘’π‘Ÿ -π‘Šπ‘“π‘Žπ‘› π‘„π‘π‘œπ‘™π‘–π‘’π‘Ÿ where πœ‚π‘‘β„Ž represents the biomass system thermal efficiency, π‘Šπ‘’π‘™π‘’ is the system`s electrical output power, π‘„π‘‘π‘Ÿπ‘¦π‘’π‘Ÿ is the drying heat, π‘„π‘π‘Ÿπ‘’π‘‘π‘Ÿπ‘¦ is the pre-drying heat and π‘Šπ‘“π‘Žπ‘› is the fan power consumption. The drying efficiency equation for the dryer is as follows: 𝑄 πœ‚=𝑄 𝑖𝑛 π‘œπ‘’π‘‘ where πœ‚ represents the dryer efficiency, 𝑄𝑖𝑛 is the heat input from pre-drying and boiler exhaust gas drying, and π‘„π‘œπ‘’π‘‘ is the heat output from the condenser and flue gas emissions. Site Material π’Ž̇ (kg/s) T (℃) P (kPa) Site Material π’Ž̇ (kg/s) T (℃) P (kPa) SMS water SMS water SMS water Air Air Air Flue gas Air Flue gas Isohexane Ash Isohexane Air Isohexane Air Isohexane Air with an increase of the evaporation temperature. This study investigated the effect of evaporation temperature and pre-drying moisture content on system performance. As a result, the power consumption of the fan decreased, leading to a gradual improvement in the thermal efficiency of the biomass system and the ORC efficiency. The ORC reached its maximum output at 150°C. By adjusting the pre-drying moisture content from 50% to 65%, the condensation waste heat from the ORC can be utilized more effectively. The pre-drying efficiency increased from 65.12% to 69.89%, while the flue gas drying efficiency decreased from 69.95% to 22.29%. In the case of pre-drying with 50% moisture content, the power generation system achieved the highest thermal efficiency of 58.60%. @@

LAY DEFINITIONS
  • Biomass fuel: A biofuel is a fuel that is produced through contemporary processes from biomass, rather than a fuel produced by the very slow geological processes involved in the formation of fossil fuels, such as oil. Since biomass technically can be used as a fuel directly, some people use the terms biomass and biofuel interchangeably
  • substrate: A wafer (slice or substrate) is a thin slice of semiconductor material, such as a crystalline silicon, used in electronics for the fabrication of integrated circuits and in photovoltaics for conventional, wafer-based solar cells. The wafer serves as the substrate for microelectronic devices built in and over the wafer and undergoes many microfabrication process steps such as doping or ion implantation, etching, deposition of various materials, and photolithographic patterning
  • mushroom: An extensive order of basidiomycetous fungi whose fruiting bodies are commonly called mushrooms.
  • Combined heat and power: Cogeneration or combined heat and power is the use of a heat engine or power station to generate electricity and useful heat at the same time. Trigeneration or combined cooling, heat and power refers to the simultaneous generation of electricity and useful heating and cooling from the combustion of a fuel or a solar heat collector
  • Flue gas: Flue gas is the gas exiting to the atmosphere via a flue, which is a pipe or channel for conveying exhaust gases from a fireplace, oven, furnace, boiler or steam generator. Quite often, the flue gas refers to the combustion exhaust gas produced at power plants
  • Rotary dryer: The rotary dryer is a type of industrial dryer employed to reduce or minimize the liquid moisture content of the material it is handling by bringing it into direct contact with a heated gas. The dryer is made up of a large, rotating cylindrical tube, usually supported by concrete columns or steel beams
  • Waste heat: Waste heat is by necessity produced both by machines that do work and in other processes that use energy, for example in a refrigerator warming the room air or a combustion engine releasing heat into the environment. The need for many systems to reject heat as a by-product of their operation is fundamental to the laws of thermodynamics
  • Moisture content: Water content or moisture content is the quantity of water contained in a material, such as soil, rock, ceramics, fruit, or wood. Water content is used in a wide range of scientific and technical areas, and is expressed as a ratio, which can range from 0 to the value of the materials` porosity at saturation

Licence: cc-by

Site reference: https://www.e3s-conferences.org/articles/e3sconf/pdf/2024/09/e3sconf_issat2024_05003.pdf

DOI reference: https://www.doi.org/10.1051/e3sconf/202447905003

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source https://magazine.sciencepod.net/feasibility-and-performance-analysis-of-utilizing-spent-mushroom-substrate-as-biomass-fuel/

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