Energy audit result of Dabaco Group JSC

Case study

31/07/2019

Dabaco GroupJSC is a multi-disciplinary enterprise, however, it specializes in in breeding food production and food processing.

It is one of the 10 largest breeding food producers in the country. It has 6 feed mills with a total capacity of 85 tons per hour, synchronous and automatic technologies imported from the US, France and EU,...

Dabaco TOPFEEDS Feed Mill uses mainly electricity which is supplied by 2 electrical substations: 1x1.600 kVA-22/0,4 kV supplies power for production area and 1x1.000-22/0,4kV for raw material warehouse and coal.

The enterprise's electricity consumption in 2017 is as follows:

Energy efficiency potential

Energy audit results show huge potential of energy efficiency of Dabaco TOPFEEDS Feed Mill. Proposed energy saving solutions can help the company save 326,236 kWh/year and 689.2 tons coal/year, equivalent to annual energy cost savings of VND2.2 billion.

Particular energy efficiency solutions

13 energy solutions are found during energy audit period including VSD, power factor improvement, air Compressor system improvement, heat recovery in boiler.

Solution No.1: Installing hot air pipes to the outside area of the air compressor
Real situation The temperature at the air compressor area is very high (25oC) as it does not have hot air ejection system which reducesthe compressor operation performance and increases energy and maintenance costs.	Expected output After hot air pipesare installed to the outside area of the air compressor, the inlet air temperature shall be equal to air compressor in other area (18oC)which increases the compressor operation performance and reduces its energy consumption.
Energy efficency results
Electricity savings: 2,592 kWh/year	Investment cost: VND 10 million
Cost savings: VND 4.62 million/ year	Payback period: 2.6 years
Solution No. 2: Improving excess air rate of 4 ton boiler
Real situation The proportion of O2 in discharge smoke(14,8%)is much higher than the standard one (3.5-4.8%) for solid fuel boilers causing energy waste.	Expected output After the installation of inverters for air supply fan and air ejection fan, The proportion of O2 in discharge smoke reduces from 14.8% to 4.5%, leading to heat savings of162,556kcal/hour.
Energy efficency results
Fuel savings: 550,454 tons/ year	Investment cost: VND 300 million
Cost savings: VND 1.274 billion/ year	Payback period: 0.2 year
Solution No. 3:Recovering heat from discharge smoke of boiler
Real situation Theat recovery equipment which has been recently installed does not work well as the temperature of exhaust fumes is still very high (220oC).	Expected output After the economizer is installed at the position of the existing air preheater, exhaust smokes' temperature reduces from 220oC to 150oC resulting to heat savings of 40,979.68 kcal/hour.
Energy efficency results
Fuel savings: 138.77 tons/year	Investment cost: VND 200 million
Cost savings: VND 321.253million/year	Payback period: 0.6 year

Dabaco Group JSC is one of 10 enterprises entitled to energy audit implementation within the framework of the Project for Promoting Investment Market for Energy Efficiency in Industrial Sector in Vietnam, funded by the Korean Government through Korean International Cooperation Agency (KOICA). The Hanoi Industrial Promotion and Development Consultancy Center conducted a energy audit in collaboration with Korean energy audit expert at the Dabaco TOPFEEDS Feed Mill located at Khac Niem Industrial Zone, Ba Ninh City, Bac Ninh Province from November 19, 2018 to November 30, 2018.

Bao Nam

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