Hermetic Acrylic Respiration Chamber
Provides an airtight 50-liter test enclosure with internal gas circulation fan and sampling ports.
Agricultural Engineering / Produce Respiration Kinetics
FREE TO EXPLORELABORATORY 32 · AGRICULTURAL ENGINEERING
Fruit & Vegetable Respiration Heat Rate under Controlled Atmosphere
Measure the carbon dioxide evolution rate and respiration heat production of stored agricultural produce across storage temperatures using closed-system gas analysis. Explore interactive farm machinery simulation, irrigation hydraulics, and agricultural engineering telemetry.
FARM MACHINERY · SOIL & WATER · POST-HARVEST · STRUCTURES
Your virtual agricultural engineering laboratory.
CO2 EVOLUTION RATE R_CO2—
FIELD & TEST CELL TELEMETRY
Ready to sample with Temp T = 10.0 °C.
Adjust Temp T, 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
The linear kinetic model applies within the commercial refrigerated storage range of 2 °C to 22 °C. Evaluated on fresh Gala apples (moisture content 84.5% w.b.) in a sealed 50-liter acrylic respiration chamber under normoxic atmospheric conditions (21% O2 baseline). Linearized temperature sensitivity is evaluated between 2 °C and 22 °C.
Agricultural apparatus & field instrumentation sensors.
Refrigerated Environmental Test Chamber
Regulates ambient chamber temperature from 0 °C to 25 °C within ±0.1 °C stability.
Non-Dispersive Infrared (NDIR) CO2 Analyzer
Monitors carbon dioxide concentration rise with 1 ppm resolution over discrete sampling intervals.
Galvanic Fuel-Cell Oxygen Sensor
Measures oxygen depletion rate to compute the respiratory quotient (RQ = CO2 produced / O2 consumed).
Pulp Core Thermistor Probes
Monitors internal flesh temperature of representative fruit specimens to verify core thermal equilibrium.
Precision Platform Balance
Measures total fresh produce test mass to normalize gas evolution rates to milligrams per kilogram-hour.
FOLLOW THE METHOD
A reason behind every step.
Measure the carbon dioxide evolution rate and respiration heat production of stored agricultural produce across storage temperatures using closed-system gas analysis. Standardized parameter settings: 2.0, 6.0, 10.0, 14.0, 18.0, 22.0 °C.
01
Produce Sample Preparation
Weigh exactly 10.00 kg of uniform, blemish-free Gala apples and insert core thermistors into two representative reference fruits.
02
Chamber Temperature Equilibration
Place the produce in the environmental chamber at 2.0 °C for 6 hours until fruit pulp core reaches within 0.2 °C of setpoint.
03
Hermetic Sealing and Baseline Purge
Seal the respiration chamber lid and flush briefly with fresh air to establish standard 400 ppm baseline atmospheric CO2.
04
Gas Evolution Rate Measurement
Isolate the chamber and record NDIR CO2 accumulation over a 60-minute incubation period, ensuring CO2 remains below 10,000 ppm.
05
Temperature Progression Sequence
Repeat thermal equilibration and 60-minute CO2 accumulation trials at 6.0, 10.0, 14.0, 18.0, and 22.0 °C.
06
Rate Calculation and Kinetic Regression
Calculate R_CO2 in mg/(kg·h) and plot against temperature T, fitting a linear regression to determine thermal respiration sensitivity k_r.
YOUR NOTEBOOK · 0 OBSERVATIONS
Turn measurements into agricultural engineering insight.
Points are your recorded observations. The solid regression line validates Produce Respiration Kinetics mathematical scaling.
LINEAR REGRESSION FIT · y = mx + b
R_CO2 = k_r · T + R_0 = 1.4500 · T + 3.2000
| # | Storage Temperature T (°C) | CO2 Evolution Rate R_CO2 (mg/(kg·h)) | Temperature T (°C) | CO2 evolution rate R_CO2 (mg/(kg·h)) | Remove |
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