Transcript Selff sustaining greenhouse

WHY SELF-SUSTAINING
GREENHOUSE?
ECON. 2505
ENVIRONMENTAL ECONOMY
By: Milor Louis
Prof. Sean MacDonald
Spring 2016
OBJECTIVE
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We will discuss:
1. Introduction
2. Intended field trip research
3. what is a conventional greenhouse
4. How it works
5. Problems
6. Solutions
7. Breakdown of each system
8. Benefits
9. Conclusion
INTRODUCTION
• A greenhouse works by greatly increasing the
growing season for a variety of vegetables. It does
this by controlling temperatures, light, and even
humidity.
• The purpose of my research was to investigate how
a self sustaining greenhouse system can improve
the actual conventional greenhouse.
INTENDED FIELD TRIP
• Located at Gowanus
Source: Gothamgreens.com
GOTHAM GREENHOUSE FACILITIES
Source: Gothamgreens.com
WHAT IS A GREENHOUSE ?
• A greenhouse is a glass structure house in which the
temperature is maintained within a desired range,
which it is used for cultivating tender plants or
growing plants out of season.
Source: Google Images
HOW IT WORKS
Source: Google Images
PROBLEM
Source: Google Images
CONT. PROBLEM
Source: Google Images
SOLUTIONS
• This can be corrected by having an automation
system that can monitor the weather while
controlling the inside temperature simultaneously by
using temperature sensor.
• The implementation can be done by having an
integration heating and cooling system.
HEATING SYSTEM
• A greenhouse heating system is important for maintaining a uniform
warm temperature throughout the entire interior of a greenhouse
despite colder temperatures outside of it.
• Sensors can be used to gather data in real time about the
temperature and humidity of the crop zone, and this data is sent to
the computer which uses software to increase or reduce the
temperature of the greenhouse
• Convection
• Convection heat transfer is the physical movement of a warm gas or
liquid to a colder location. Heat transfer by convection includes not
only the movement of air but also the movement of water vapor.
• Radiation
• Radiation heat transfer occurs between two bodies without direct
contact or the need for a medium such as air. Like light, heat
radiation follows a straight line and is either reflected, transmitted or
absorbed upon striking an object.
• Conduction
• Heat is conducted either through a substance or between objects by
direct physical contact.
• Any heating system that provides uniform temperature control
without releasing material harmful to the plants is acceptable.
COOLING SYSTEM
• Ventilation reduces inside temperature during sunny days and supplies carbon
dioxide, which is vital to the plants’ photosynthesis. Another advantage of
ventilation is to remove warm, moist air and replace it with drier air.
• Exhaust Fans in End Wall
• Fans in the end wall are the most common method of forced ventilation. The air
enters through the motorized shutter (winter) and is pulled through the greenhouse
by the exhaust fans.
• Pressure Fans in End Walls
• The fans in the end wall are usually two-speed and controlled by separate
thermostats
• Ventilation for greenhouses that are 100 feet or shorter can be accomplished by
mounting pressure fans, which blow air into the house, high in the end walls.
• Natural Ventilation
• Some greenhouses can be ventilated using side and ridge vents, which run the full
length of the house and can be opened as needed to provide the desired
temperature. This method uses thermal gradients, creating circulation due to warm
air rising
ENVIRONMENTAL CONTROL OF A GREENHOUSE SYSTEM
USING NI EMBEDDED SYSTEMS TECHNOLOGY (15S TO2MN)
Source: youtube.com
THE LAST VIDEO
Source: youtube.com
BENEFITS
• This system is much more beneficial. According to Gotham Greens,
this production techniques are capable of producing over 50% more
crop than conventional greenhouses while using 25% less energy per
pound of crop produced.
• This system increasing food security.
• Also, the 170,000 square feet of greenhouses that Gotham Greens
has produce yields equivalent to over 100 acres of conventional field
farming. Therefore, this method yields 20-30 times more product per
acre than field production while eliminating any use of arable land.
• Conversion, a 17000 Sq. feet= 3 acres
• A 25’ x 90’ greenhouse = 2,250 sf.
• Conventional greenhouse make a Profit of $3,600
• All year long sustaining greenhouse make a profit of $10,700
ENVIRONMENTAL BENEFIT
• By having more crops and plants, this will help
reduce CO2 in the environment and shoot out
more Oxygen.
• Also, Because of the proximity of this system to the
destination, it will eliminate the need for longdistance, refrigerated food transportation.
• Finally, these facilities can be supplied with on site
solar panels and high efficiency design features,
such as LED lighting, advanced glazing, passive
ventilation, and thermal curtains. This will sharply
reduce electrical and heating demand.
CONCLUSION
• The advantages of this greenhouse compared to standard
greenhouses:
• The biggest advantage of this self-sustaining passive greenhouse
is that it offers a closed controlled environment where the water is
always recirculated.
• The second advantage of this greenhouse is that it is selfsustaining, it needs only minimal human intervention. This is
possible by using embedded solutions (like an eBox) for process
control and environment monitoring.
• The third advantage of this greenhouse is that it is passive, all the
energy it needs can be produced locally by photovoltaic panels.
• The fourth advantage of this greenhouse is that it is eco-friendly, it
uses only environmental-friendly technology like renewable
energy sources, for heating and cooling it uses a heat pump and
not traditional heating and cooling equipment.
WORK SCITED
• Gotham Greens Local Produce
• http://gothamgreens.com/
• Giuliano Vox, Meir Teitel, Alberto (Feb, 2010)
• Sustainable greenhouse system in “Sustainable
Agriculture Technology Planning and Management.”
• G.A. Giacomelli, S. Sase, R. Cramer, J. Hoogeboom, A.
MacKenzie, (Sept, 2012)
• Greenhouse Production System for People
• Retrieve from Googlescholar.com
• Thierry Boulard ( October, 2007)
• Greenhouse-crop system control for a sustainable plant
production.
• Retrieve from Googlescholar.com
THANK YOU FOR LISTENING!
• ANY QUESTIONS?