A Greenhouse Climate Node: Light, Carbon Dioxide, Humidity, and Ventilation Control in One Instrument

Design of a greenhouse climate node combining PAR light, dual-wavelength NDIR carbon dioxide (5.0 cm path), and capacitive humidity/temperature sensing with a hysteretic vent/fan relay control law. Performance budget computed from Beer-Lambert, air-exchange, buoyancy-flow, and daily-light-integral arithmetic. SIMULATED, NOT MEASURED: no hardware was built or tested.

Authors

Publication Details

Journal
Zenodo (CERN European Organization for Nuclear Research)
Published
2026-11-10
DOI
https://doi.org/10.5281/zenodo.24102621
Primary Topic
Greenhouse Technology and Climate Control
Type
article
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article

A Greenhouse Climate Node: Light, Carbon Dioxide, Humidity, and Ventilation Control in One Instrument

William Alexander Aldred
Zenodo (CERN European Organization for Nuclear Research)
Greenhouse Technology and Climate Control
article

A Greenhouse Climate Node: Light, Carbon Dioxide, Humidity, and Ventilation Control in One Instrument

William Alexander Aldred
article en

Abstract

Design of a greenhouse climate node combining PAR light, dual-wavelength NDIR carbon dioxide (5.0 cm path), and capacitive humidity/temperature sensing with a hysteretic vent/fan relay control law. Performance budget computed from Beer-Lambert, air-exchange, buoyancy-flow, and daily-light-integral arithmetic. SIMULATED, NOT MEASURED: no hardware was built or tested.

Zenodo (CERN European Organization for Nuclear Research)
Greenhouse Technology and Climate Control
DOIOpen Access PDFOpenAlex
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A Greenhouse Climate Node: Light, Carbon Dioxide, Humidity, and Ventilation Control in One Instrument — William Alexander Aldred · Zenodo (CERN European Organization for Nuclear Research) (2026) | TGRS Research Map | TGRS