Upload File

greenhouse climate models

7
 EFITA 2003 Co nferen ce 5-9. July 200 3, Debrec en, Hung ary 823 GREENHOUSE CLIMATE MODELS: AN OVERVIEW José Boaventu r a Cu nh a, [email protected] UTAD – Universidade de Trás-os-Montes e Alto Douro, Dep. Engenharias CETAV – Centro de Estudos e de Tecnologias do Ambiente e Vida 5001-911 Vila Real, Portugal Abstract: Greenhouse climate and crop models are essential for improving environmental management and control efficiencies. In this paper, are described several types of models that could be used to simulate and predict the greenhouse environment, as well as the tuning methods to compute their parameters. This study focuses on the dynamical behaviours of the inside air temperature, humidity and carbon dioxide concentration models and their domains of application. Linear and non- linear mode ls will be covered, focu sing on issues such as: physical models, black-box mod els, and neural networks models. Several experiments will be presented to illustrate the performance of each model in the simulation and prediction of the greenhouse climate. The models are described as functions of the outside climate, the control actions performed and the transpiration and  phot osynt hesis res ponse s of the plan ts. The dat a used to co mput e the simu latio n model s were acqu ired in an experimental greenhouse using a sampling time interval of 1 minute. The greenhouse is automated with several actuators and sensors that are connected to an acquisition and control system  base d on a perso nal co mput er. Keywords: Crop models, Greenhouse climate models, Neural networks, System identificatio n 1. Introduction To improve the management and control of a greenhouse climate, an adaptive climate control strategy must be used to compute the optimal control signals used for a defined cost  performance function. The adaptive  PID – Proportional Integral Derivative controller structure showed in  figure 1 could be used for this purpose. The adaptive controller needs the use of greenhouse climate models to predict future outputs based on past and current inputs, the expected control actions and the predicted weather inputs. An optimiser module computes the proportional, integral and derivative gains, in order to minimize or maximize the specified cost function according to the constraints imposed. Afterwards, these parameters are sent to the  PID closed controlled loop.

Upload: yopisukita

Post on 03-Apr-2018

212 views

Category:

Documents


0 download

Report

TRANSCRIPT

Page 1: Greenhouse Climate Models

7/28/2019 Greenhouse Climate Models

http://slidepdf.com/reader/full/greenhouse-climate-models 1/7

Page 2: Greenhouse Climate Models

7/28/2019 Greenhouse Climate Models

http://slidepdf.com/reader/full/greenhouse-climate-models 2/7

Page 3: Greenhouse Climate Models

7/28/2019 Greenhouse Climate Models

http://slidepdf.com/reader/full/greenhouse-climate-models 3/7

Page 4: Greenhouse Climate Models

7/28/2019 Greenhouse Climate Models

http://slidepdf.com/reader/full/greenhouse-climate-models 4/7

Page 5: Greenhouse Climate Models

7/28/2019 Greenhouse Climate Models

http://slidepdf.com/reader/full/greenhouse-climate-models 5/7

Page 6: Greenhouse Climate Models

7/28/2019 Greenhouse Climate Models

http://slidepdf.com/reader/full/greenhouse-climate-models 6/7

Page 7: Greenhouse Climate Models

7/28/2019 Greenhouse Climate Models

http://slidepdf.com/reader/full/greenhouse-climate-models 7/7


Section 16.1 Climate Change Our Dynamic Climate · PDF file1 + Climate Change Chapter 16 + Section 16.1 Our Dynamic Climate + The Greenhouse Effect! A natural process in which greenhouse

Agriculture & climate change. Greenhouse gases

Greenhouse Effect Mechanisms Affecting the Greenhouse Evidence for Climate Change

Smart Solutions for a Changing Climate...climate models and seasonal forecasts, greenhouse gas mitigation, crop varieties, agricultural and land use adaptations, water resource management,

Climate, weather, & climate models

Climate Change Global Warming Greenhouse Effect

Climate Change – Greenhouse Gases Background Greenhouse Effect Gases absorb heat

Climate change impacts and greenhouse gas … change impacts and greenhouse gas mitigation effects ... Steven C. Chapra, Charles Fant, ... Climate change impacts and greenhouse gas

1 Greenhouse Gas Emissions, Global Climate Models, and California Climate Change Impacts

A climate for change: agriculture and greenhouse gas ... · A climate for change: agriculture and greenhouse gas mitigation in the 21st century ... Achieving greenhouse gas mitigation

€¦  · Web viewGlobal climate models (GCM) are mechanistic models used to understand and predict how changes in variables such as greenhouse gas concentrations will affect future

A physicist’s view on atmospheric and climate models R. Koch Introduction, aims The gardener’s greenhouse, greenhouse effect, greenhouse gases, climate

Greenhouse Gases and Climate

Greenhouse Gangsters vs. Climate Justice

The Greenhouse Effect, the Oceans and Climate Changebrosenhe/Oceanography/13_Oceans... · The Greenhouse Effect, the Oceans and Climate Change ... Greenhouse Effect. 2 EENS/EBIO 223

Cold-Climate Greenhouse Resource

The Greenhouse Effect and Global Climate ChangeGreehouse+…  · Web viewThe Greenhouse Effect and Global Climate Change. ... Because of how they warm our world, ... Greenhouse Effect

Monitoring of forest dynamics: carbon stocks, greenhouse ... · biodiversity and ecosystem functions Ecosystem models Climate change models Local, regional, and global models Disturbance-response

PAST CLIMATE AND THE GREENHOUSE EFFECT

Major Greenhouse Gases and Climate Change

Climate Change/Greenhouse Gas Emissions Controls

Intro. to the Greenhouse Effect Climate and Climate Change

GREENHOUSE GASES CLIMATE CHANGE - University of …scifun.chem.wisc.edu/CHEMWEEK/GreenhouseGases2017.pdf · GREENHOUSE GASES & CLIMATE CHANGE . ... century and illustrate the net

16 GREENHOUSE GASES AND CLIMATE CHANGE

Communitywide Greenhouse Gas Reduction and Climate Change ... · Sacramento County Climate Action Plan Communitywide Greenhouse Gas Reduction and Climate Change Adaptation (Communitywide

Chapter 4.8 Greenhouse Gas Emissions and Climate … 4.8 Greenhouse Gas Emissions and... · and Water Rights Project 4.8-1 . CHAPTER 4.8 Greenhouse Gas Emissions and Climate Change

Greenhouse Effect and Climate Change

22 Climate change and greenhouse gas · 2020-04-07 · Chapter 22 – Climate change and greenhouse gas . Climate change and greenhouse gas . This chapter outlines the climate change

CLIMATE POLICY GREENHOUSE GAS IMPACT ... - wri.org.cn

Evapotranspiration Models in Greenhouse - WUR

Greenhouse Gas Emissions, Global Climate Models, and California Climate Change Impacts

13 Greenhouse Gases and Climate Change

presentation on Greenhouse effect & climate change

Climate Change. Climate Change: What is a Greenhouse Gas?

UNIT 4:. Lesson 1 – Greenhouse Effect Introduction to climate and climate change Greenhouse Effect