The simplified calculation formulas for Revised Degree-Hours are shown in Eq. (1-1) and Eq. (1-2). The detailed derivation process can be found in Chapter 6 of the monograph.
Eq. (1-1) – For Cooling
Eq. (1-2) – For Heating
Typical hourly meteorological parameters for representative cities worldwide are provided here. Users can select these directly or import data via a local file.
.xlsx file format.You can choose to calculate either RDH_C or RDH_H. RDH_C and
RDH_H cannot be calculated simultaneously.
Based on the type of output medium, natural energy sources are broadly classified into two categories: Cold/Hot Air and Cold/Hot Water.
When the output medium is Cold/Hot Air, the corresponding natural energy parameter can be Dry-Bulb Temperature, Wet-Bulb Temperature, or Dew-Point Temperature.
When selecting Dry-Bulb Temperature, the corresponding utilization form in Part 3 can only be Natural Ventilation or Mechanical Ventilation.
When selecting Wet-Bulb Temperature or Dew-Point Temperature, the corresponding utilization form in Part 3 can only be Outdoor Fresh Air Treatment, typically Direct Evaporative Cooling or Dew-Point Indirect Evaporative Cooling for outdoor air.
When the output medium is Cold/Hot Water, the corresponding methods for obtaining natural energy can include Cooling Tower, Dew-Point Indirect Evaporative Chiller, Borehole Heat Exchanger, or Nocturnal Radiative Cooler.
The corresponding utilization forms in Part 3 can be categorized based on the application point: Outdoor Air Treatment, Indoor Air Treatment, Pipe-Embedded Wall, or Pipe-Embedded Window. The structure and heat exchange principles of Pipe-Embedded Walls and Pipe-Embedded Windows can be referenced in Chapters 3 and 5 of the monograph.
Each natural energy utilization method has a different rated Energy Efficiency Ratio (EER), which can be customized by the user. The concept and calculation method for the rated EER can be referenced in Chapter 6 of the monograph, which details the simplified RDH calculation method.
备注：- Notes: