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A Validated Model, Scalability, and Plant Growth Results for an Agrivoltaic Greenhouse.

Record Type:	Electronic resources : Monograph/item
Title/Author:	A Validated Model, Scalability, and Plant Growth Results for an Agrivoltaic Greenhouse./
Author:	Evans, Michael E.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2021,
Description:	146 p.
Notes:	Source: Masters Abstracts International, Volume: 83-07.
Contained By:	Masters Abstracts International83-07.
Subject:	Alternative energy. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28494542
ISBN:	9798759999591

A Validated Model, Scalability, and Plant Growth Results for an Agrivoltaic Greenhouse.
Evans, Michael E.

A Validated Model, Scalability, and Plant Growth Results for an Agrivoltaic Greenhouse. - Ann Arbor : ProQuest Dissertations & Theses, 2021 - 146 p.

Source: Masters Abstracts International, Volume: 83-07.

Thesis (M.S.M.)--Villanova University, 2021.

This item must not be sold to any third party vendors.

A question of growing concern today is whether to use available arable land for farming or solar energy collection. The growing sub-field of agrivoltaics has arisen to provide an answer. Agrivoltaics seeks to find a solution that allows the land to be used for both purposes while not sacrificing much of the yield of either. Our research team has designed, built, instrumented, and modeled one possible solution to the problem in the form of an experimental test cell we believe can achieve that goal. Our test cell is composed of two full-sized photovoltaic panels (PVs) positioned facing the east and west at a slope angle of 35°. We aligned the two panels to create an 8-inch gap at the upper edges. The result is a roughly triangular prism, which has its north and south ends sealed with insulated panels.The gap is filled with a transparent polycarbonate sheet. The test cell creates a fully enclosed space that is heated by waste heat from the PVs in addition to solar gain. The base of the test cell is covered with inexpensive low density concrete blocks to provide thermal mass, which thermally couples the system to the ground. The goal of our work is to examine whether waste heat from PVs can be used to enhance the greenhouse effect and thus extend the length of the growing season. Located on the west campus of Villanova University, the data collected over more than a year shows test cell has maintained a cell temperature greater than the ambient temperature even during the cold winter months.Furthermore, plant growth experiments conducted in the tests cell have demonstrated the ability to keep kale seedlings alive through the winter. A locally 1-D transient heat and moisture transport model was also developed, which we used to predict the performance for a range of variations of the test cell design. A shadowing model was developed to predict the incident radiation distribution on the area within the test cell and to compare the test cell's performance to other agrivoltaic designs. The results of the thermal model, cell air temperature, and shadowing model, instantaneous beam radiation on a base node, are promising as they correlate well with experimental data and results in references. The moisture transport model requires additional calibration. We suggest several improvements to the initial design such as increasing the amount of solar gain to the cell, implementing a humidity control system, improving ventilation during summer months, optimizing thermal mass, and increasing internal volume. Data collection continues including test cell thermal performance and plant growth metrics.

ISBN: 9798759999591Subjects--Topical Terms:

3436775
Alternative energy.
Subjects--Index Terms:

Agriculture

A Validated Model, Scalability, and Plant Growth Results for an Agrivoltaic Greenhouse.
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500 $a Source: Masters Abstracts International, Volume: 83-07.
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520 $a A question of growing concern today is whether to use available arable land for farming or solar energy collection. The growing sub-field of agrivoltaics has arisen to provide an answer. Agrivoltaics seeks to find a solution that allows the land to be used for both purposes while not sacrificing much of the yield of either. Our research team has designed, built, instrumented, and modeled one possible solution to the problem in the form of an experimental test cell we believe can achieve that goal. Our test cell is composed of two full-sized photovoltaic panels (PVs) positioned facing the east and west at a slope angle of 35°. We aligned the two panels to create an 8-inch gap at the upper edges. The result is a roughly triangular prism, which has its north and south ends sealed with insulated panels.The gap is filled with a transparent polycarbonate sheet. The test cell creates a fully enclosed space that is heated by waste heat from the PVs in addition to solar gain. The base of the test cell is covered with inexpensive low density concrete blocks to provide thermal mass, which thermally couples the system to the ground. The goal of our work is to examine whether waste heat from PVs can be used to enhance the greenhouse effect and thus extend the length of the growing season. Located on the west campus of Villanova University, the data collected over more than a year shows test cell has maintained a cell temperature greater than the ambient temperature even during the cold winter months.Furthermore, plant growth experiments conducted in the tests cell have demonstrated the ability to keep kale seedlings alive through the winter. A locally 1-D transient heat and moisture transport model was also developed, which we used to predict the performance for a range of variations of the test cell design. A shadowing model was developed to predict the incident radiation distribution on the area within the test cell and to compare the test cell's performance to other agrivoltaic designs. The results of the thermal model, cell air temperature, and shadowing model, instantaneous beam radiation on a base node, are promising as they correlate well with experimental data and results in references. The moisture transport model requires additional calibration. We suggest several improvements to the initial design such as increasing the amount of solar gain to the cell, implementing a humidity control system, improving ventilation during summer months, optimizing thermal mass, and increasing internal volume. Data collection continues including test cell thermal performance and plant growth metrics.
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653 $a Greenhouse
653 $a Greenhouse model
653 $a Photovoltaic
653 $a Renewable energy
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710 2 $a Villanova University. $b Department of Mechanical Engineering. $3 3690967
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793 $a English
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