Dataset of Variable Air Volume (VAV) Damper Measurements, Energy Estimation, and Metabolic Rate (MR) Calculation
Description
This dataset contains measurements and calculations related to Variable Air Volume (VAV) damper performance, fan energy estimation, and occupant metabolic rate (MR). The dataset records airflow, fan speed (rpm), brake horse power (bhp), and metabolic rate (MR) to evaluate the relationship between motor damper adjustment, energy consumption, and oxygen demand of building occupants. It is designed for applications in HVAC optimization, energy efficiency studies, and occupant-centric indoor environment analysis. Measurements were collected to evaluate the performance of Variable Air Volume (VAV) dampers and their impact on fan energy consumption and occupant metabolic rate (MR). The methodology includes three main components: 1. VAV Damper Percentage The damper opening percentage was calculated from airflow differences between two operating conditions. A default value of 70% was used, with a minimum threshold of 30% enforced when the computed percentage equaled zero. 2. Energy Estimation Fan energy demand was determined using the relationship between fan speed (rpm), airflow ratios, and brake horse power (bhp₂). The formula applied a cubic relation to capture the effect of rpm on power demand. Results were converted from horsepower to watts using a conversion factor of 745.7. 3. Metabolic Rate (MR) and Oxygen Consumption Occupant metabolic rate was computed by multiplying activity levels with surface area energy intensity (W/m²). Body Surface Area (BSA) was estimated using the DuBois formula based on height and weight. MR values were converted to kcal/hour, kcal/min, and kcal/day, and subsequently to oxygen consumption using the equivalence of 1 kcal = 0.239 LO₂. Dataset Structure The dataset is provided in Excel format (proper-dataset-used.xlsx) and contains variables related to airflow, fan performance, and metabolic rate calculations. Airflow measurements are recorded at two conditions, denoted as Airflow1 and Airflow2, expressed in cubic feet per minute (CFM). Corresponding fan speeds are noted as RPM1 and RPM2, measured in revolutions per minute, along with brake horse power (bhp₂) in horsepower. From these inputs, the dataset includes the calculated percentage opening of the VAV damper (Percent-VAV, in %) and the estimated energy demand of the fan system (Energy-VAV, in watts). To represent occupant-related parameters, the dataset provides values of metabolic rate (MR, in W/m²) and Body Surface Area (BSA, in m²), derived from standard anthropometric formulas. These are further converted into energy expenditure indicators: kcal per hour, kcal per minute, and kcal per day. Finally, the dataset contains oxygen consumption values expressed in liters per minute (LO₂/min), computed from the caloric values using the equivalence of one kilocalorie to 0.239 liters of oxygen. Together, these variables provide a comprehensive basis for analyzing damper performance, energy efficiency, and occupant oxygen demand.
Files
Steps to reproduce
1. Collect airflow measurements at two damper operating conditions (Airflow1 and Airflow2). 2. Record fan speeds (RPM1 and RPM2) and brake horse power (bhp₂) from the VAV system. 3. Compute damper percentage using the airflow ratio with a default of 70% and a minimum threshold of 30%. 4. Estimate fan energy demand using the cubic rpm relation and convert to watts. 5. Calculate Body Surface Area (BSA) from height and weight using the DuBois formula. 6. Multiply activity level by W/m² to obtain MR, then convert to kcal/hour, kcal/min, and kcal/day. 7. Transform kcal values to oxygen consumption using the conversion 1 kcal = 0.239 L O₂. 8. Organize results in tabular form (Excel) for further analysis or machine learning applications.
Institutions
- Universitas Trilogi