Protective cultivation is widely used nowadays in order to increase crop yield by
creating the optimum conditions such as temperature, humidity and CO2 content,
irrespective of outside conditions. Since plant production doubles for every 10
degrees increase in temperature to a certain limit, this makes temperature a very
important factor for optimum plant growth. In order to keep the greenhouse
temperature constant during changes in outside conditions, heating and often cooling
are required.
Heating of a greenhouse can be done using different systems and design procedures.
The applicability of different types of greenhouses is studied at the field local
conditions, Ç / avundur-Ç / ankiri, Turkey. Required heating load was calculated that is
due to infiltration and conduction through the greenhouse cover at a single design
point, which is the minimum outside temperature. Two types of heating systems, soil
heating system and bare tube system, were considered. Analysis of results showed that, Ç / avundur geothermal field with 54 ° / C fluid
temperature is suitable for greenhouse heating. Although the existing well Ç / -1 is
capable of producing 47 l/s, the flow rate of geothermal fluid for greenhouse heating
was limited by 35 l/s due to existing thermal facilities in the area.
Among different glazing materials, plastic film covered greenhouses with double
poly was found to be the most suitable in terms of heat load calculations.
The maximum number of greenhouses (the area of each green house is 216 m2) that
can be heated by Ç / avundur Geothermal field was found to be 138 by considering soil
heating with double poly glazing material.
Annual heat load factor of geothermal energy for greenhouse heating in Ç / avundur
area was found to be as high as 96% depending on indoor design temperature and
base load.
| Identifer | oai:union.ndltd.org:METU/oai:etd.lib.metu.edu.tr:http://etd.lib.metu.edu.tr/upload/1172352/index.pdf |
| Date | 01 January 2003 |
| Creators | Kasapoglu, Huseyin |
| Contributors | Parlaktuna, Mahmut |
| Publisher | METU |
| Source Sets | Middle East Technical Univ. |
| Language | English |
| Detected Language | English |
| Type | M.S. Thesis |
| Format | text/pdf |
| Rights | To liberate the content for public access |
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