Performance Evaluation of a Commercial Greenhouse in Canada Using Dehumidification Technologies and Led Lighting: A Modeling Study

26 Pages Posted: 17 Jun 2022

See all articles by Syeda Humaira Tasnim

Syeda Humaira Tasnim

University of Guelph

Alexander Nauta

affiliation not provided to SSRN

David Lubitz

affiliation not provided to SSRN

Jingjing Han

affiliation not provided to SSRN

Abstract

Mechanical dehumidification systems are one possible way to control excess humidity and reduce greenhouse gas emissions in production greenhouses. Similarly, upgrading lighting systems from older high pressure sodium (HPS) to LEDs reduces electrical energy use but also impacts heating and ventilation requirements. The impact of implementing these technologies must be considered in the context of its effects on the entire greenhouse system, and there are few system-level studies for production greenhouses in the literature, particularly in the context of a southern Canada climate. In this study, an extensively-validated lumped parameter greenhouse energy and interior climate model is used to simulate the energy use of three different dehumidification technologies at a commercial greenhouse in southwestern Ontario, Canada. Each of three greenhouse bays containing a different dehumidification unit was simulated for spring, fall and winter conditions. Potential energy (kWh), greenhouse gas (kg CO2e) and cost reductions were estimated for each test case. Potential energy savings from switching from HPS to LEDs was also examined. It was found that benefits of implementing these technologies in southern Ontario can be significant, but depend strongly on relative costs of electrical and natural gas energy, and the relative importance of costs savings or greenhouse gas reductions.

Keywords: greenhouse microclimate, Dehumidification technology, energy savings, energy and mass balance, lumped capacitance model

Suggested Citation

Tasnim, Syeda Humaira and Nauta, Alexander and Lubitz, David and Han, Jingjing, Performance Evaluation of a Commercial Greenhouse in Canada Using Dehumidification Technologies and Led Lighting: A Modeling Study. Available at SSRN: https://ssrn.com/abstract=4139225 or http://dx.doi.org/10.2139/ssrn.4139225

Syeda Humaira Tasnim (Contact Author)

University of Guelph ( email )

Guelph
Canada

Alexander Nauta

affiliation not provided to SSRN ( email )

No Address Available

David Lubitz

affiliation not provided to SSRN ( email )

No Address Available

Jingjing Han

affiliation not provided to SSRN ( email )

No Address Available

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