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THE MINISTRY OF
INDUSTRY AND TRADE
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SOCIALIST
REPUBLIC OF VIETNAM
Independence - Freedom - Happiness
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No. 02/2014/TT-BCT
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Hanoi, January
16, 2014
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CIRCULAR
ON
SOLUTIONS FOR ECONOMICAL AND EFFICIENT USE OF ENERGY IN INDUSTRIES
Pursuant to the Law on economical and efficient
use of energy dated June 17, 2010;
Pursuant to Decree No. 95/2012/ND-CP dated
November 12, 2012 of the Government defining the functions, tasks, entitlements
and organizational structure of the Ministry of Industry and Trade;
Pursuant to Decree No. 21/2011/ND-CP dated March
29, 2011 of the Government on guidelines for the Law on economical and
efficient use of energy;
The Minister of Industry and Trade promulgates a
Circular on solutions for economical and efficient use of energy in industries,
Chapter 1.
GENERAL PROVISIONS
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This Circular deals with:
1. Economical and efficient use of energy in
general industrial processes.
2. Management and solutions for economical and
efficient use of energy in chemical industry.
Article 2. Regulated entities
This Circular applies to:
1. Industrial producers prescribed in Clause 1
Article 9 of the Law on economical and efficient use of energy.
2. Other relevant agencies, organizations, and
individuals.
Article 3. Interpretation of
terms
1. General processes in industrial production
(hereinafter referred to as general processes) mean processes of supply,
transformation, storage and use of energy in production in the industrial
producers.
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3. IEER means integrated energy efficiency
ratio, kW/kW.
4. IPLV means integrated part load value –
also known as integrated part load energy efficiency; kW/kW.
5. Specific energy consumption (SEC) means
an amount of energy consumed per a unit of product.
Chapter 2.
ECONOMICAL AND EFFICIENT
USE OF ENERGY IN GENERAL PROCESSES
SECTION 1. GENERAL REQUIREMENTS
Article 4. Energy efficiency
Energy efficiency in general processes shall be
determined as follows:
1. Through energy audit at industrial producers.
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Article 5. Management of
economical and efficient use of energy in general processes
1. The energy efficiency and energy efficiency
targets must be reflected in annual plans and 5-year plans for energy use of
industrial producers.
2. The energy efficiency of general processes and
achieved targets according to the above plans must be reflected in the energy
audit report and annual energy consumption report.
3. The energy efficiency in general processes must
satisfy requirements prescribed in this Circular.
4. Industrial producers must have plans to carry
out solutions for energy-saving and other solutions as prescribed in this
Circular.
5. The solutions for energy-saving shall be
studied, supplemented and updated regularly.
SECTION 2. ECONOMICAL AND
EFFICIENT USE OF ENERGY IN COMBUSTION PROCESSES
Article 6. General requirements
1. The efficiency of the combustion processes must
be controlled to optimize the combustion. In order to optimize the combustion,
the following typical excess air are required: CO2 = 14,5 - 15 %, O2
= 2 – 3 %.
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3. Appropriate and productive heating equipment is
required for economical and efficient use of energy.
4. A fuel process is required to ensure the
combustion efficiency.
Article 7. Solutions for
economical and efficient use of energy in combustion processes
1. Requirements pertaining to gaseous fuels:
ensuring the ratio between air and fuel levels to achieve optimum combustion.
2. Requirements pertaining to liquid fuels
a) Dry the fuel before combustion;
b) Control temperatures;
c) Maintain burners periodically.
3. Requirements pertaining to solid fuels (coal):
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b) Ensure optimal moisture: comply with Section 1.1
Appendix II of this Circular;
c) Ensure homogeneity of fuels: comply with Section
1.1 Appendix II of this Circular.
Article 8. Selection of
appropriate heating equipment and fuels
1. Select appropriate heating equipment and fuels
for economical and efficient use of energy.
2. Increase use of biomass fuel instead of
traditional fuels.
3. Strengthen mechanization and automation in fuel
supply process.
SECTION 3. ECONOMICAL AND
EFFICIENT USE OF ENERGY IN HEAT SUPPLY SYSTEM AND COOLING SYSTEM
Article 9. Requirements and
solutions for heat supply system
1. Economical and efficient use of energy in heat
supply system must satisfy the following requirements:
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b) Pressure loss in gas transporting pipelines <
3 bars.
c) Heat loss rate in transporting pipelines <
5%.
d) A pipeline system ensuring dilation, condensate
discharge and no steam leak.
e) A steam distributing system in accordance with
Section 2 Appendix II of this Circular.
2. Solutions
a) Regarding boilers:
- Optimize the fuel combustion;
- Use high-performance heat exchangers;
- Carry out periodic boiler blowdown.
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- Ensure good insulation;
- Prevent system leakage;
- Make use of the excess heat from waste heat flow
of condensate.
Article 10. Requirements
pertaining to other heat supply system
1. Fuel and heat loads must satisfy requirements
according to design conditions.
2. The heat supply system must be maintained
periodically.
3. The system of heating pipelines and insulation
must be designed to ensure minimum heat loss.
Article 11. Requirements
pertaining to cooling system
1. Select appropriate equipment and technology.
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3. The cooling system must have high IPLV and IEER
coefficients.
Article 12. Solutions for
economical and efficient use of energy in cooling system
1. Optimize the heat exchanger.
2. Maintain heat exchanging surface.
3. Adjust power suitable for load of the system.
4. Use multi-level cooling system.
5. Use cold storage system to store cold in
off-peak hours for peak hours.
6. Design and maintain the insulation system of the
cooling system periodically.
7. Monitor quantity and quality of the refrigerant
periodically.
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Article 13. General
requirements
1. Make use of heat waste for other heat-used
processes or electricity generation.
2. Quantity of heat waste and potential
application: comply with Section 3 Appendix II of this Circular.
Article 14. Solutions for
making use of heat waste
1. Install a set of heat exchanger to use heat
waste for water supply.
2. Install boilers to make use of heat waste.
3. Use thermal turbines, coil pipeline system, heat
pipeline system and gas exchanger.
4. Recover heat from flue gas, engine coolant,
engine exhaust, low pressure steam, drying oven exhaust, boiler blowdown.
SECTION 5. ECONOMICAL AND
EFFICIENT USE OF ENERGY IN AIR CONDITIONING SYSTEM AND HOT WATER SUPPLY
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1. Economical and efficient use of energy in air
conditioning system and hot water supply shall comply with Section 2.2 of
Circular No. 15/2013/TT-BXD.
2. Design an air conditioning system and hot water
supply in accordance with Circular No. 15/2013/TT-BXD.
3. The hot water supply for production processes
must conform to technology process. The efficiency of this system bases on the
efficiency of system of heat supply and heat transfer.
Article 16. Solutions for
economical and efficient use of energy in system of heat water supply
1. Use solar energy.
2. Use excess heat water from production process.
3. Use excess steam or heat from production for tap
water heating.
4. Use heat from air conditioning system.
5. Use heat pump system.
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Article 17. General
requirements
The system shall be designed to avoid the following
types of losses:
1. Voltage loss.
2. Dephasing loss.
3. Losses due to small power factor.
4. Transformer loss.
5. Increase in electricity purchase costs due to
operation in peak hours.
Article 18. Solutions for
reducing power losses in the system
1. Increase in voltage transmission. Benefits of
high-voltage transmission are prescribed in Section 4.1 Appendix II of this
Circular.
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3. Performance transformer must be between 85%
-95%.
4. Use transformers appropriately through:
a) Select suitable transformer capacity;
b) Operate transformer stations economically;
c) Distribute suitable load between transformers;
d) Place transformer stations near motivation
equipment;
e) Do not use a voltage regulator for a motivation
circuit when voltage fluctuations occur with no great frequency;
g) Regulate voltage of MBA matching the load;
h) Replace, maintain and repair transformers.
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6. Increase the power factor of the system through
the use of devices with higher power factor or use of capacitors.
7. Manage reasonable electrical load: comply with
Section 4.2 Appendix II of this Circular.
SECTION 7. ECONOMICAL AND
EFFICIENT USE OF ENERGY IN ELECTRICAL ENGINES
Article 19. General
requirements
1. Replace low-performance engines with
high-performance engines.
2. Engines with the following features shall be
considered replacing:
a) The engine operates at partial load that is
below 60-70% of the rated capacity;
b) The engine operates at the rated capacity but it
uses adjustable valve or wind leaf with aperture below 60-70% at the output;
c) The engine operates overload in some periods of
significant operation;
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e) The engine is used with a significant power
change during use but have not used the inverter;
g) Low-performance engine;
h) The engine of which speed is adjusted with rotor
resistance.
Article 20. Solutions for
economical and efficient use of energy in engines
1. Maintain a voltage supply with a maximum
fluctuation range of 5% over the nominal value.
2. Minimize phase unbalance within 1% to avoid
reduced engine performance.
3. Maintain high power factor by installing
capacitor banks in a position as close to the engine as possible.
4. Select the appropriate engine power to avoid the
low efficiency and poor power factor.
5. Ensure that the engine load is greater than 60%.
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8. Use the variable speed drives (VSD) or two-speed
motors for the appropriate application.
9. Using inverter for motors with considerate
fluctuation power during use and motors of which speed is adjusted by rotor
resistance.
10. Replace the engine which is broken, overload or
partial load with the high-performance engine.
11. Rewind the engine being burned at the guarantee
technical service.
12. Optimize transmission efficiency through
maintenance and proper installation of axes, chains, gears, and the transmission
belt.
13. Control ambient temperature to extend the
insulation life time and reliability of the engine.
14. Maintain engine as recommended by the
manufacturer and use high-quality oil or grease to avoid contamination or
water.
15. Compensate reactive power for the engine if
necessary.
16. When replacing or fitting the controller for
the engine, it is required to note the characteristics of the motor and load to
ensure improvement plans can operate effectively in a technological process of
the system.
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Article 21. General
requirements
Lighting system in offices and workshops in
industrial plants must conform to the following requirements:
1. Ensure the necessary brightness at the working
positions.
2. Ensure brightness with minimal power
consumption.
Article 22. Solutions for
economical and efficient use of energy in lighting system
1. In order to ensure efficient lighting system,
the following requirements must be satisfied:
a) Design a conformable lighting system;
b) Use right types of energy-saving lamps for
appropriate areas;
c) Using sensors to turn lights on or off on
demand(light intensity sensors, movement sensors, timers);
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e) Use accessories effectively;
g) Use capacitors to increase power factor.
2. Regarding offices: apply technical standards
prescribed in Section 2.3 of Circular No. 15/2013/TT-BXD.
3. Regarding plants: apply Vietnam’s Standards
7114:2002 (2008) for lighting system inside the buildings. Lighting range
recommended for a number of typical industrial producers: comply with Section
5.1 Appendix II of this Circular. When replacing the energy-saving lamps, it
should pay attention to lighting characteristics and lighting requirements of
the work area to select the appropriate lamps. Specifications of a number of
popular lamps: comply with Section 5.2 Appendix II of this Circular.
4. Standards for efficient lighting system: comply
with Circular No. 15/2013/TT-BXD.
SECTION 9. ECONOMICAL AND
EFFICIENT USE OF ENERGY IN COMPRESSED AIR SYSTEM
Article 23. Requirements for
efficient operation applicable to compressed air system
1. Ensure efficient compressed air supply for the
required technology process.
2. Using the best air compressors suitable for the
requirements of the system. Criteria for selecting air compressors: comply with
Section 6.1 Appendix II of this Circular. Minimize losses during compressed air
supply to the technology equipment.
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1. Ensure quality of input gas of compressors:
clean, dry and cool; air temperature affect to the energy efficiency of the
compressor prescribed in section 6.2 Appendix II of this Circular. Reduce
pressure drop at the filter inlet to avoid reducing compressor performance. The
impact of the pressure drop across the filter on the power consumption
specified in Section 6.3 Appendix II of this Circular.
2. Find and handle compressed air leak and prevent
leakage. Regularly check for any leaks and pressure losses in the whole system
(monthly).
3. Adjusting operations in consumers at the lowest
possible pressure.
4. Close all gas supplies to the equipment is not
operating.
5. Isolate single device using high-pressure
compressed air.
6. Monitor the pressure drops in pipeline
distribution system.
7. When one or multiple compressors for a general
distribution, the compressor shall be operated so that the production cost of
compressed air is minimized.
9. Consider using multi-level compressors.
10. Reduce the pressure as low as possible.
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12. Apply preventive maintenance strategy
systematically for compressors and auxiliary parts.
13. Ensure that the condensate must be removed from
the distribution system immediately or no condensate.
14. Check out that the sizes of tanks can either
contain enough air for the huge demand in the short term or not.
Chapter 3.
ENERGY-CONSUMPTION RATES
AND REQUIREMENTS FOR ECONOMICAL AND EFFICIENT USE OF ENERGY IN INDUSTRIES
SECTION 1. SPECIFIC ENERGY
CONSUMPTION AND IMPROVEMENTS IN ENERGY EFFICIENCY
Article 25. Determination of
specific energy consumption and improvements in energy efficiency in industrial
producers
1. Specific energy consumption (SEC) shall be
determined according to the procedures prescribed in Appendix III of this
Circular.
2. SEC shall be determined according to a unit of
typical products of an industry (metric tons of products, units of products,
etc.). In case the industrial producer has various types of output products,
they shall be converted to a typical product.
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4. The level of improvement in energy efficiency
shall be prescribed according to the industry, technology level, production
scale and production features of the industrial producer. The proposed level of
improvement shall be prescribed according to plan stages.
5. Industrial producers shall report specific
energy consumption and level of improvements in energy efficiency achieved in comparison
with the annual plans.
SECTION 2. IMPROVEMENTS IN
ENERGY EFFICIENCY IN CHEMICAL INDUSTRY
Article 26. Specific energy
consumption and improvements in energy efficiency in chemical industry
1. Raw rubber production sector.
a) Levels of energy consumption (refer to Section
1.1 of Appendix IV):
- For producers with a capacity of less than 5,000
metric tons per year: 44 kOE per tonne (commercial products);
- For producers with a capacity of between 5,000
metric tons and 10,000 metric tons per year: 36 kOE per tonne (commercial
products);
- For producers with a capacity of 10,000 metric
tons or more per year: 28 kOE per tonne (commercial products);
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- For producers having consumption level higher
than rated level: carry out solutions for economical and efficient use of
energy;
- For producers having consumption level equal to
rated level or lower : keep maintaining and improving technology.
2. NPK fertilizer production sector
a) Levels of energy consumption (refer to Section
1.2 of Appendix IV)
- For producers with a capacity of less than 4,000
metric tons per year: 14.8 kOE per tonne (commercial products);
- For producers with a capacity of between 4,000
metric tons and 9,000 metric tons per year: 16.8 kOE per tonne (commercial
products);
- For producers with a capacity of 9,000 metric
tons or more per year: 19.7 kOE per tonne (commercial products);
b) Improvements in energy efficiency:
- For producers having consumption level higher
than rated level : carry out solutions for economical and efficient use of
energy;
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3. Water paint production sector
a) Levels of energy consumption (refer to Section
1.3 of Appendix IV):
- Average level of energy consumption: 12.1 kOE per
tonne (commercial products).
b) Improvements in energy efficiency:
- For producers having consumption level higher
than rated level: carry out solutions for economical and efficient use of
energy;
- For producers having consumption level equal to
rated level or lower: keep maintaining and improving technology.
4. Solvent paint production sector
a) Levels of energy consumption (refer to Section
1.4 of Appendix IV):
- Average level of energy consumption: 17.7 kOE per
tonne (commercial products).
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- For producers having consumption level higher
than rated level: carry out solutions for economical and efficient use of
energy;
- For producers having consumption level higher
than rate level: keep maintaining and improving technology.
Article 27. Solutions for
improvements in energy efficiency in chemical industry
1. Raw rubber production section
a) Use high-performance engines;
b) Convert current for compressor components
(packaging);
c) Gasification from wood to fuel oil / LPG for
material drying system;
d) Solutions for sewage treatment system;
- Changing from surface aeration by aeration
refined;
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e) Improve energy management.
2. NPK fertilizer production sector
a) Reduce circulation factor in the production
process;
b) Use high-performance engines;
c) Use optimal inverter for fans and pumps;
d) Using heat waste in cooling stages for drying
materials;
e) Improve energy management;
3. Paint and solvent paint production sector
- Use high-performance engines;
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- Improve energy management.
Chapter 4.
IMPLEMENTATION
Article 28. Responsibility of
General Department of Energy
1. Monitor and inspect the management of energy
efficiency in industrial producers.
2. Carry out management of energy efficiency as
prescribed in this Circular.
3. Determine and update quotas on energy
consumption in industries for management of energy efficiency.
Article 29. Responsibility of
Services of Industry and Trade
1. Cooperate with General Department of Energy in
guidelines and inspection of implementation of economical and efficient use of
energy as prescribed in this Circular.
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3. Take charge and cooperate with Services in
inspection and guidelines for industrial producers to implement this Circular.
Article 30. Implementation
1. This Circular comes into effect from June 1,
2014.
2. Difficulties that arise during the
implementation of this Circular should be reported to the Ministry of Industry
and Trade for consideration.
PP.
MINISTER
DEPUTY MINISTER
Le Duong Quang
