The Daikin Altherma simulation software is a static calculation tool, which can be used as an indication for dimensioning Daikin Altherma heat pump systems. The software works with following assumptions.
- A detailed study to calculate the heat load should be made. The heat load of the house is a crucial input in the software. Miscalculating the heat load will lead to badly dimensioned heat pump systems with a reduced efficiency. Calculating the heat load cannot be done with the simulation software.
- The software uses climatological data, which has been measured and averaged over a number of years. Real conditions will differ from these averaged values.
- The simulation is based on the assumption that heating is required 24h/24h. The daytime capacity is calculated in function of ambient temperature and design heat load. The nighttime capacity (night setback) is calculated in function of ambient temperature and fraction of design heat load, for which this fraction is defined as required indoor night temperature divided by 22.0°C.
- Eurelectric provides the CO2 emissions per kWh electricity for every country. If Eurelectric does not give a value, the software uses an average value of 0.3540 kg/kWh instead.
Personalising the input data:
Under 'Preferences', following input data should be reviewed for every new simulation.
- Minimum ambient temperature at which the heating capacity is 0 kW.
- Prices for gas, fuel and electricity (including day and night price period) used for comparison.
- Day and night period for design room temperature, including night setback temperature.
Efficiencies of gas and oil boilers: The efficiency values for gas and oil boilers used for comparative calculations are adjustable under 'Preferences'. The default efficiencies are chosen to reflect the minimum requirements of the European Boiler Efficiency Directive 92/42/EC for low temperature boilers.
Domestic warm water production: The Daikin Altherma system can optionally be combined with a sanitary warm water tank for the preparation of domestic warm water. The type of tank and its capacity can be selected in the simulation for the investment cost calculation.
Cooling mode: The reversible version of the Low Temperature Daikin Altherma system can provide cooling. The energy consumption for cooling is included in the energy and cost calculations when a reversible system is selected and cooling operation requirements and design parameters/conditions are defined.
It shows the thermal design and sizing calculations of cooled heat exchangers.
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