Power Consumption in Ring Spinning Mills
Two types of energy can be used in a specific spinning mill; electrical energy and thermal energy. Machines, air conditioning, lamps used for illumination and compressors consume electrical energy while the thermal energy is consumed by air conditioning and processes such as fixation of yarns.
Power consumption at various stages of spinning
General energy usage in ring spinning Energy is generally used for operating machines, air conditioning and illuminating the atmosphere where yarns are manufactured in spinning mills. In addition to these, compressors which provide compressed air to the spinning line use energy. Two types of energy can be used in a specific spinning mill; electrical energy and thermal energy. Machines, air conditioning, lamps used for illumination and compressors consume electrical energy while the thermal energy is consumed by air conditioning and processes such as fixation of yarns. Generally, thermal energy is obtained from coal, diesel oil, fuel oil, natural gas, and steam.
The table shows the energy consumption of a specific combed yarn in a modern factory with its production steps. It can be seen from the table that 221.1kWh energy is used for a given spinning line of 1000 spindles, 61% of which is consumed by machines and the highest energy consumption with 30% share occurs at the spinning stage.
Energy consumption of specific combed ring yarn.
|Production Steps||Electricity consumption of specific combed yarn per 1000 spindles for each process|
|kWh/1000 spindles||Share, %|
|Yarn Finishing Treatments||14.7||6.5|
Energy usage for the specific ring and open-end yarn.
The energy usage and energy cost of both 20 tex combed ring-spun yarn and 20 tex open-end yarn for the chosen countries are illustrated in the following table. The amount of energy needed for ring yarn changes between 3.49 – 3.62 kWh/kg while the energy needed for open-end yarn is between 2.44 and 2.58 kWh/kg. Since the electrical energy prices are different in the chosen countries, the energy cost differs from country to country although the consumption is nearly the same.
Energy usage for a specific ring and open-end yarn.
|Countries||Electrical energy prices, $/kWh||Ring yarn (Combed)||Open-End Yarn|
|Energy consumption, kWh/kg||Energy cost, $/kg||Energy consumption, kWh/kg||Energy cost, $/kg|