Bosch GREENSTAR PLUS Operations Instructions download pdf (Page 11)

APPENDIX

6 720 803 688 (2012/11) 11

10 APPENDIX

10.1 COST WEIGHTING OF ELECTRICITY PRICE - GAS PRICE

GLOSSARY

OPERATING PRESSURE

The operating pressure is the pressure in the heating system.

PROGRAMMING UNIT

The programming unit ensures the automatic control of the flow

temperature subject to outside temperature (in case of weather-

compensated controllers) in conjunction with a time programme.

INSTANTANEOUS WATER HEATER PRINCIPLE

The water is heated as it flows through the appliance. The maximum

draw-off rate is quickly available, i.e. without long waiting times or

interruptions for the heat-up process.

HEATING RETURN

The heating return is the pipework that returns the heating water at a

lower temperature from the radiators/underfloor heating system etc. to

the heat source.

HEATING WATER

Heating water is the water that circulates in the heating system.

COEFFICIENT OF PERFORMANCE

The coefficient of performance , (COP), is the actual or calculated

identifier for air to water heat pumps under specified operating

conditions, similar to the standardised fuel consumption for vehicles.

The coefficient of performance  describes the ratio between the

available heating energy and the power drawn by the compressor.

PRIMARY ENERGY FACTOR (PEF)

The consumption of fossil fuels is referred to as the primary energy

factor (PEF).

THERMOSTATIC VALVE

Thermostatic valves are mechanical temperature controllers that

enables a lower or higher heating water flow rate subject to ambient

temperature in order to maintain a constant temperature.

FLOW TEMPERATURE

Flow temperature is the temperature with which the heated heating

water flows from the appliance to the radiators, underfloor heating

circuits, etc.

EFFICIENCY

Efficiency describes the ratio between available output and energy

input. Under ideal circumstances, the efficiency is 1. Technical

processes always involve some losses, hence the efficiency of technical

equipment is always below 1.

Air to water heat pumps draw a large proportion of the energy [they

deliver] from the environment. This portion of energy is not described as

supplied energy, as it is free of charge. Were the efficiency under these

conditions to be calculated, it would be  1. As this would not be correct,

the coefficient of performance (COP) was introduced for air to water

heat pumps in order to describe the ratio between available or useful

energy to that which has been expended (in this case purely the working

energy). The coefficient of performance for air to water heat pumps lies

between 3 and 6.

Electricity price [P/kWh]

10.0-10.9

11.0-11.9

12.0-12.9

13.0-13.9

14.0-14.9

15.0-15.9

16.0-16.9

17.0-17.9

18.0-18.9

19.0-19.9

20.0-20.9

21.0-21.9

22.0-22.9

23.0-23.9

24.0-24.9

25.0-25.9

26.0-26.9

27.0-27.9

28.0-28.9

29.0-29.9

30.0-30.9

Gas price [P/kWh]

3.0-3.9 2.8 3.0 3.3 3.5 3.8 4.1 4.3 4.6 4.9 5.1 5.4 5.7 5.9 6.2 6.4 6.7 7.7 7.2 7.5 7.8 8.8

4.0-4.9 2.1 2.3 2.5 2.7 3.0 3.2 3.4 3.6 3.8 4.0 4.2 4.4 4.6 4.8 5.0 5.2 5.4 5.6 5.8 6.0 6.2

5.0-5.9 1.7 1.9 2.1 2.2 2.4 2.6 2.7 2.9 3.1 3.2 3.4 3.6 3.7 3.9 4.1 4.2 4.4 4.6 4.7 4.9 5.1

6.0-6.9 1.5 1.6 1.8 1.9 2.0 2.2 2.3 2.5 2.6 2.7 2.9 3.0 3.2 3.3 3.4 3.6 3.7 3.9 4.0 4.2 4.3

7.0-7.9 1.3 1.4 1.5 1.6 1.8 1.9 2.0 2.1 2.3 2.4 2.5 2.6 2.7 2.9 3.0 3.1 3.2 3.3 3.5 3.6 3.7

8.0-8.9 1.1 1.2 1.3 1.4 1.6 1.7 1.8 1.9 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 3.0 3.1 3.2 3.3

9.0-9.9 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2.0 2.1 2.2 2.3 2.4 2.4 2.5 2.6 2.7 2.8 2.9

10.0-10.9 0.9 0.9 1.1 1.2 1.3 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2.0 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.6

11.0-11.9 0.8 0.9 1.0 1.1 1.1 1.2 1.3 1.4 1.5 1.5 1.6 1.7 1.8 1.9 1.9 2.0 2.1 2.2 2.3 2.3 2.4

12.0-12.9 0.8 0.8 0.9 1.0 1.1 1.1 1.2 1.3 1.3 1.4 1.3 1.6 1.6 1.7 1.8 1.9 1.9 2.0 2.1 2.2 2.2

13.0-13.9 0.7 0.8 0.8 0.9 1.0 1.0 1.1 1.2 1.2 1.3 1.2 1.4 1.5 1.6 1.7 1.7 1.8 1.9 1.9 2.0 2.1

14.0-14.9 0.7 0.7 0.8 0.8 0.9 1.0 1.0 1.1 1.2 1.2 1.2 1.3 1.4 1.5 1.5 1.6 1.7 1.7 1.8 1.9 1.9

15.0-15.9 0.6 0.7 0.7 0.8 0.9 0.9 1, 1.0 1.1 1.1 1.1 1.3 1.3 1.4 1.4 1.5 1.6 1.6 1.7 1.7 1.8

16.0-16.9 0.6 0.6 0.7 0.7 0.8 0.9 0.9 1.0 1.0 1.1 1.0 1.2 1.2 1.3 1.4 1.4 1.5 1.5 1.6 1.6 1.7

Table 3 Call-up example: cost weighting of electricity and gas prices

1 2 ... 6 7 8 9 10 11 12

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Bosch GREENSTAR PLUS Operations Instructions Page 11

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