Woody biomass utilization

Overview

Plants such as trees absorb and fix carbon dioxide in the atmosphere through photosynthesis.
Carbon dioxide is generated when trees are processed and burned as energy, but the carbon dioxide will be absorbed again by the trees in the process of growth if the forest is renewed after the trees have been felled.
By using woody biomass fuel, which has such carbon-neutral characteristics instead of fossil fuels. It is possible to reduce carbon dioxide and emissions and contribute to the prevention of regional warnings.

Changes in domestic consumption of wood pellets Advantages of using wood pellets Image of wood pellet firing system

Changes in domestic consumption of wood pellets

Demand for woody biomass energy is increasing around the world due to the recent rise in energy prices and the acceleration of the movement toward decarbonization.
Demand for wood pellets, one of the types of woody biomass energy, is expected to continue to grow in order to realize a carbon0-neutral society.

Advantages of using wood pellets

By using wood pellets as a heat source for air conditioners. we can expect to reduce CO₂ emissions and the running costs of air conditioning.

Target machine output	211kW
Electricity rate	From Tokyo Electric Power Price Chart(October 2022 forecast)
Gas rate	From the Tokyo Gas tariff(October 2022 forecast)

System example of wood pellet fired chiller

Dormitory Town hall Hospital

Dormitory

Business type	Dormitory
Model	Wood pellet fired chiller(2 units)
Heat input	201kW(wood pellet)
Chilled water application	Air conditioning in student dormitory
Energy saving	171,850（kWh/year）

Proposal content

At the time of construction of the student dormitory, we proposed a wood pellet fired absorption chiller that used local wood as a heat source. Achieving student dormitory air conditioning that reduces electricity consumption and CO₂ emissions.

Town hall

Business type	Town hall
Model	Wood pellet fired chiller(3 units)
Heat input	302kW(wood pellet)
302kW(wood pellet)	Air conditioning in the town hall
Energy saving	258,280(kWh/year)

Proposal content

When the town office was rebuilt, an air-conditioning system with a wood pellet fired absorption chiller using local wood pellets as fuel was introduced. Achieved town office air conditioning that reduces electricity consumption and CO₂ emissions.

Hospital

Business type	Hospital
Model	Wood pellet fired chiller(2 units)
Heat input	603kW(wood pellet)
Chilled water application	Air conditioning in hospital
Energy saving	922,400（kWh/year）

Proposal content

Added a wood pellet fired absorption chiller(cooling output: 637kW) to the existing kerosene fired absorption chiller(cooling output: 1,337kW). Reduce energy consumption and CO₂ emissions by covering the base operation of existing equipment with a wood pellet fired absorption chiller.