Psychrometric Air-Conditioning Tunnel
Includes variable-speed fan, electric heating elements, steam humidifier, and measurement stations.
Agricultural Engineering / Air-Grain Psychrometrics
FREE TO EXPLORELABORATORY 23 · AGRICULTURAL ENGINEERING
Moist Air Psychrometrics & Evaporative Drying Potential Across Grain Beds
Determine the sensible heat transfer, moisture carrying capacity, and psychrometric drying potential of heated air across deep grain beds using psychrometric enthalpy balances. Explore interactive farm machinery simulation, irrigation hydraulics, and agricultural engineering telemetry.
FARM MACHINERY · SOIL & WATER · POST-HARVEST · STRUCTURES
Your virtual agricultural engineering laboratory.
DRYING POTENTIAL EVAPORATIVE CAPACITY ΔW—
FIELD & TEST CELL TELEMETRY
Ready to sample with Air Temp T_db = 49.0 °C.
Adjust Air Temp T_db, then execute agricultural trial.
Agricultural engineering telemetry and biosystems states are evaluated rigorously using 64-bit IEEE 754 precision. Residuals reflect ordinary least-squares regression across successive observations. Continuous data structures support high-fidelity agricultural and environmental modeling.
Agricultural assumptions and boundary condition limits
Assumes ideal adiabatic drying conditions; heat losses through uninsulated duct walls cause slight departures from constant enthalpy lines. Evaluated at ambient intake air conditions of 20°C dry-bulb and 60% RH (ambient humidity ratio W_in = 8.8 g/kg dry air) across drying temperatures from 35°C to 70°C.
Agricultural apparatus & field instrumentation sensors.
Precision Aspirated Wet & Dry Bulb Psychrometer
Measures dry-bulb (T_db) and wet-bulb (T_wb) temperatures with 0.1°C matched thermistors.
Digital Psychrometric Humidity Transmitters
Logs dew point, absolute humidity ratio W, and relative humidity across duct stations.
Experimental Deep-Bed Grain Column (0.5 m Depth)
Standard test bed of moist corn through which conditioned air percolates.
Differential Pressure Transmitter across Grain Bed
Measures airflow static resistance and Shedd's curve pressure drop (Pa/m).
Digital Orifice Flowmeter
Measures total air mass flow rate m_dot_air (kg/s) with 1.0% accuracy.
FOLLOW THE METHOD
A reason behind every step.
Determine the sensible heat transfer, moisture carrying capacity, and psychrometric drying potential of heated air across deep grain beds using psychrometric enthalpy balances. Standardized parameter settings: 35.0, 42.0, 49.0, 56.0, 63.0, 70.0 °C.
01
Ambient Air Baseline Acquisition
Record ambient air dry-bulb temperature (20.0°C) and relative humidity (60.0%), calculating baseline humidity ratio W_in = 8.80 g H₂O/kg dry air from psychrometric relations.
02
Duct Heating & Airflow Stabilization
Set duct air velocity to 0.4 m/s through the grain column, powering the heating stage to achieve initial dry-bulb temperature T_db = 35.0°C.
03
Sensible Heating Verification
Verify that absolute humidity ratio W upstream of the grain bed matches ambient W_in, confirming pure sensible heating without moisture addition.
04
Exhaust Psychrometric Logging
Measure exhaust air wet-bulb and dry-bulb temperatures downstream of the grain bed, determining saturation humidity ratio W_sat at the adiabatic wet-bulb temperature.
05
Temperature Stepping
Increment heater temperature in five uniform stages to 42, 49, 56, 63, and 70°C, recording steady-state inlet and outlet psychrometric states for each run.
06
Drying Potential Linear Regression
Calculate evaporative capacity ΔW = W_sat - W_in for each temperature, plot ΔW versus T_db, and determine the thermal drying sensitivity gradient s_dp.
YOUR NOTEBOOK · 0 OBSERVATIONS
Turn measurements into agricultural engineering insight.
Points are your recorded observations. The solid regression line validates Air-Grain Psychrometrics mathematical scaling.
LINEAR REGRESSION FIT · y = mx + b
ΔW = s_dp · T_db + ΔW_0 = 0.4200 · T_db - 5.0000
| # | Heated Drying Air Dry-Bulb Temperature T_db (°C) | Drying Potential Evaporative Capacity ΔW (g/kg) | Drying air temperature T_db (°C) | Evaporative capacity ΔW (g H₂O/kg dry air) | Remove |
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