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Flexible Energy Management in an Unc...

Payne, Henry,

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Flexible Energy Management in an Uncertain Greenhouse /

Record Type:	Electronic resources : Monograph/item
Title/Author:	Flexible Energy Management in an Uncertain Greenhouse // Henry Payne.
Author:	Payne, Henry,
Description:	1 electronic resource (200 pages)
Notes:	Source: Dissertations Abstracts International, Volume: 85-12, Section: A.
Contained By:	Dissertations Abstracts International85-12A.
Subject:	Greenhouse gases. -
Online resource:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=31472694
ISBN:	9798382829265

Flexible Energy Management in an Uncertain Greenhouse /
Payne, Henry,

Flexible Energy Management in an Uncertain Greenhouse /Henry Payne. - 1 electronic resource (200 pages)

Source: Dissertations Abstracts International, Volume: 85-12, Section: A.

The global energy sector is responsible for a considerable contribution to climate change through carbon emissions. In response to this, energy intensive sectors and industries worldwide are attempting to improve their energy efficiency and transition to sustainable sources of energy. In the context of the Netherlands the greenhouse horticultural sector is a large consumer of energy, which is provided to the greenhouse in the form of electrical power and natural gas. Given the pressures of climate change and the need for greenhouses to be economically feasible and competitive, the efficient use of energy and the economic acquisition of energy is a priority. The strategy for energy usage and acquisition within a greenhouse is supported by computer simulations that predicts the future performance of the greenhouse if a certain management strategy were to be followed. Using these computer simulations it is possible to test multiple theoretical strategies before they are applied to the greenhouse. These strategies describe potential ways that the technical aspects of the greenhouse are operated, how the crop within the greenhouse might be managed and how the energy requirements of the greenhouse might be met. This approach can produce efficient management strategies from computer simulations that rely on mathematical models of the greenhouse and forecasted weather and energy price data. This use of computer models does however present a problem, if the models are inaccurate the simulations they are used for are incorrect and the resulting management strategies may be flawed. Accordingly, the work included in this thesis focusses on how inaccuracies in the models and data used for greenhouse simulations affect the accuracy of those predictions. Furthermore, how does that influence the resulting management strategies and where are the opportunities for improvement. These improvements may be made by reducing specific inaccuracies or by incorporating inaccuracies into the strategy making process. From the perspective of energy management, efficiency in a greenhouse can be improved by either improving the accuracy of the amount of energy being acquired or by acquiring that energy at a better price. While it has been previously outlined how accuracy may be improved, a possible avenue for acquiring energy at a better price is to incorporate any inherent capacity to store energy within the greenhouse. In doing so cheap energy can be bought and stored in some form for usage in high price periods. Existing greenhouse strategies incorporate the greenhouse hot water buffer as a capacity to store surplus heat energy. There are however, other energy capacities within the greenhouse, for example if the crop within the greenhouse can store surplus sugars in its assimilate pool. As such this thesis also focuses on identifying the potential of incorporating the assimilate pool into the process of deriving greenhouse management strategies. A further example explored in this thesis being, the use of the Combined Heat and Power generator (CHP) within the greenhouse to use available gas reserves to generate power to offset high price periods or if the greenhouse can offset power demand by anticipating periods of higher outside radiation using weather forecasts. 

English

ISBN: 9798382829265Subjects--Topical Terms:

797971
Greenhouse gases.

Flexible Energy Management in an Uncertain Greenhouse /
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520 $a The global energy sector is responsible for a considerable contribution to climate change through carbon emissions. In response to this, energy intensive sectors and industries worldwide are attempting to improve their energy efficiency and transition to sustainable sources of energy. In the context of the Netherlands the greenhouse horticultural sector is a large consumer of energy, which is provided to the greenhouse in the form of electrical power and natural gas. Given the pressures of climate change and the need for greenhouses to be economically feasible and competitive, the efficient use of energy and the economic acquisition of energy is a priority. The strategy for energy usage and acquisition within a greenhouse is supported by computer simulations that predicts the future performance of the greenhouse if a certain management strategy were to be followed. Using these computer simulations it is possible to test multiple theoretical strategies before they are applied to the greenhouse. These strategies describe potential ways that the technical aspects of the greenhouse are operated, how the crop within the greenhouse might be managed and how the energy requirements of the greenhouse might be met. This approach can produce efficient management strategies from computer simulations that rely on mathematical models of the greenhouse and forecasted weather and energy price data. This use of computer models does however present a problem, if the models are inaccurate the simulations they are used for are incorrect and the resulting management strategies may be flawed. Accordingly, the work included in this thesis focusses on how inaccuracies in the models and data used for greenhouse simulations affect the accuracy of those predictions. Furthermore, how does that influence the resulting management strategies and where are the opportunities for improvement. These improvements may be made by reducing specific inaccuracies or by incorporating inaccuracies into the strategy making process. From the perspective of energy management, efficiency in a greenhouse can be improved by either improving the accuracy of the amount of energy being acquired or by acquiring that energy at a better price. While it has been previously outlined how accuracy may be improved, a possible avenue for acquiring energy at a better price is to incorporate any inherent capacity to store energy within the greenhouse. In doing so cheap energy can be bought and stored in some form for usage in high price periods. Existing greenhouse strategies incorporate the greenhouse hot water buffer as a capacity to store surplus heat energy. There are however, other energy capacities within the greenhouse, for example if the crop within the greenhouse can store surplus sugars in its assimilate pool. As such this thesis also focuses on identifying the potential of incorporating the assimilate pool into the process of deriving greenhouse management strategies. A further example explored in this thesis being, the use of the Combined Heat and Power generator (CHP) within the greenhouse to use available gas reserves to generate power to offset high price periods or if the greenhouse can offset power demand by anticipating periods of higher outside radiation using weather forecasts. 
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650 4 $a Sustainability. $3 1029978
650 4 $a Energy. $3 876794
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