Power Consumption in Ring Spinning Mills

Two types of energy can be used in a specifc 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 fxation of yarns

Previous Topic » Power consumption in Spinning Mills
Next Topic » Energy consumption of chosen spinning mill

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 specifc 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 fxation of yarns. Generally thermal energy is obtained from coal, diesel oil, fuel oil, natural gas and steam.

Table shows the energy consumption of a specifc 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 specifc combed ring yarn.

Production Steps	Electricity consumption of specifc combed yarn per 1000 spindles for each process
Production Steps	kWh/1000 spindles	Share, %
Blowing Room	16.7	7.5
Carding	17.7	8
Combing	10.9	5
Drawing-Roving	9.1	4
Ring Spinning	66.1	30
Yarn Finishing Treatments	14.7	6.5
SUB TOTAL	135.2	61
Air Conditioning	85.9	39
TOTAL	221.1	100

Energy usage for specifc 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 specifc ring and open-end yarn.

Countries	Electrical energy prices, $/kWh	Ring yarn (Combed)		Open-End Yarn
Countries	Electrical energy prices, $/kWh	Energy consumption, kWh/kg	Energy cost, $/kg	Energy consumption, kWh/kg	Energy cost, $/kg
China	0.066	3.49	0.23	2.58	0.17
India	0.084	3.57	0.30	2.50	0.21
Turkey	0.070	3.57	0.25	2.57	0.18
Brazil	0.031	3.54	0.11	2.58	0.08
S.Korean	0.047	3.62	0.17	2.55	0.12
USA	0.045	3.56	0.16	2.44	0.11
Italy	0.105	3.52	0.37	2.57	0.27

« Previous Topic
Power consumption in Spinning Mills

The cost of yarn consists of several factors such as raw material energy or power, labour, capital etc. The cost of yarn excluding raw material is termed manufacturing cost. The share of the factors in manufacturing cost changes according to the yarn properties, machine operational properties and economical situation of the spinning mill.

Next Topic »
Energy consumption of chosen spinning mill

In order to obtain the necessary information about energy consumption of a specifc spinning mill, one which is able to spin every kind of staple fibre (i.e. cotton, linen, polyester, viscone) in a wide count range using both ring and openend systems to be chosen.

TextileSchool.Com