Energy saving measures in heating, ventilation and air conditioning systems

№

The content of the event

Assessment of energy saving potential

1

Organization of accounting and control over the use of thermal energy

Up to 7… 30% of thermal energy when installing apartment heat meters

2

Reconstruction of the hot water treatment system

Saves up to 6% of fuel consumption

3

Presence of systems of automatic regulation of temperature of the heat carrier depending on external temperature

Increase of temperature of air indoors over norm increases a heat expense by 4 ÷ 6%

4

Elimination of drip leakage of water from shut-off valves

Leakage per year is 10 ÷ 35 m3 / year

5

Presence of uninsulated shut-off valves

Losses equivalent to 1 m of uninsulated pipeline

6

Installation of the regulator of heating on time

Saves up to 40% of heat consumption of the building

7

Lowering the temperature in residential buildings at night

saves up to 2% of the building's heat consumption

8

The presence of triple glazing windows.

Gives savings of up to 3 ÷ 4%

9

The presence of vestibules and their partitioning at the entrances to the room and springs on the door

Saves up to 3 ÷ 4%

10

The correct choice of color of heating devices

- coloring of the heating device with zinc paints increases heat transfer by up to 15%;

- oil painting reduces heat transfer by up to 8.5% (for cast iron radiator - reduces even more, up to 13%);

- covering of the heating device with decorative plates, curtains - reduces heat transfer by up tp 10 ÷ 12%

11

Installation of radiator thermostats

Gives heat savings of up to 6 ÷ 7%

12

Installation of heat carrier temperature regulators for heating

The estimated savings will be about 15%.

13

Presence of block individual automated heating point

Reduces heat consumption by 37% in industrial and administrative buildings and by 12% in residential buildings

14

Adjustment of heating and sealing systems of elevators and regulators in position according to debugging cards

The economic effect makes up to 15 ÷ 35%, and payback period - 1 ÷ 2 years

15

Creating an infrared heating system

The use of radiant (infrared) heating in industrial buildings saves up to 25%

16

Installation of converters with mechanical heat removal

Gives savings of up to 7%

17

Installation of air heating systems

Saves up to 10 ÷ 15%

18

The use of glazed loggias.

Gives savings of 7 ÷ 40%

19

Elimination of cold bridges in places of connection of window covers with a wall

Gives economy of 2%

20

Sealing of cracks and leaks of window and door openings

Heat consumption after sealing of cracks and leaks is reduced by up to 10 ÷ 20%. 1 m. unsealed window porch is equal to the loss of 50 kWh for 228 days

21

Installation of windows with high thermal protection characteristics. Best: 1) triple glazing in wooden weaves

2) the same with argon between the glass

Heat saving

23%

34% compared to conventional double glazing

22

Installation of double-glazed windows:

with heat-reflecting covering, or with two heat-reflecting coverings

Use of the thermal screen allows to reduce heat losses through windows from up to 22% in comparison with usual double glazing

23

The maximum possible savings of thermal energy with thermal insulation:

exterior walls

cold floors

coating

The implementation of measures will reduce the total heat loss

42%

4%

8%

24

Replacement of tubular heat exchangers with plate ones

Saves about 15% of heat

25

Installation of a heat reflector, which is a heat-insulating gasket with a reflective layer, between the heater and the wall

Saves 2 ÷ 3% of the total energy consumption

26

Restoration of thermal insulation on pipelines of heating and hot water systems

Allows to reduce heat losses by 3 ÷ 9% of total consumption

27

Transfer of the heating system from the heat carrier "steam" to the heat carrier "hot water"

Savings of 20 ÷ 30% of heat

28

The presence of infiltration of cold air in heated rooms

Additional consumption of 10 ÷ 15 kcal per cubic meter of cold air

29

Introduction of the energy-saving mode of heat supply for heating from boiler-houses or CTP taking into account household heat emissions

Annual heat savings make up to 4 ÷ 17%

30

Introduction of facade regulation of heat supply taking into account meteorological factors (wind speed and solar radiation) effect of wind speed and solar radiation in the facade regulation, the annual savings can be 9 ÷ 18%

Overconsumption of thermal energy per year without meteorological factors (without facade regulation) in the range of wind speed change from 0 to the estimated is 6 ÷ 12%. Taking into account the combined effect of wind speed and solar radiation in the facade regulation, the annual savings can be 9 ÷ 18%

31

Introduction of the economic schedule of supply of the heat carrier taking into account the type of heating system and the type of heating devices

Savings make from 5% (depending on type of heating and heating devices) of thermal loading at regulation of heat release according to the operating schedules

32

Insulation of uninsulated pipelines of heat consumption systems located in basements and unheated rooms

Annual heat savings when insulating 1 m. A bare pipeline with an average diameter of 25 mm is 0.22 Gcal / m.

№

Content of the event

Assessment of energy saving potential

1

Application of recirculation in ventilation and air conditioning systems

Savings depend on the degree of recirculation of exhaust air.

2

Application of air recovery on exhaust systems of ventilation and air conditioning

Gives savings of 20 - 70%. The savings depend on the efficiency of the recuperative heat exchanger-utilizer of exhaust air heat.

3

Application of recuperators with moisture transfer between exhaust and supply air

Increases economy in comparison with the utilizer of only obvious heat in addition to 30%

4

Application of air regeneration on exhaust ventilation and air conditioning systems

Savings depend on the efficiency of the regenerative heat exchanger-utilizer of exhaust air heat.

5

Application of two recuperative air heat exchangers on supply and exhaust systems of ventilation and air conditioning

Savings depend on efficiency of system from two heat exchangers of utilizers of heat of exhaust air

6

Presence of automatic regulators on supply systems of ventilation

Gives up to 10% of economy of heat and 25… 30% of the electric power

7

Thermal insulation of air ducts in places of laying with the lowered air temperature

Possible economy of heat and cold at high-quality execution of thermal insulation reaches 10… 15%

8

Application of frequency-regulated electric drive of fans for the purpose of regulation of an air expense

New optimum ways of quantitative regulation allow to reduce an expense of the on air movement in exhaust systems by 6 - 26% and in supply systems by 3 - 12% of size of consumption by the fan in the calculated mode

9

Joint use of general exchange and local ventilation in the form of local exhausts, air curtains, etc.

Savings are determined by calculation.

10

Localization of inflow and extraction (device of air oases, suppression, localization of inflow)

Reduction of air exchange at work of UPC by 25 - 50%

11

Elimination of suction and air leaks due to leaks in air ducts

Reduction of costs for air movement of fans by 9 - 10% (electricity)

12

Reduction of aerodynamic losses during air movement in air ducts

Increase of refrigeration load of UPC by approximately 10 - 16% for every 1000 Pa of friction losses