Main Article Content
During the daytime in the tropical region, air temperature inside the greenhouse rises some degrees above the temperature level of outside air. Many greenhouses are build very tight. It formed hot air pocket in upper part of the greenhouse. A modification should be done to allow maximum air exchange rate through natural ventilation. This paper deals with the evaluation of natural ventilation role in reducing air temperature in the modified greenhouse as compared to that in the existing greenhouse. Results showed thal greenhouse modification by increasing the area of side wall openings added 11.82 % air flow rate and reduced the temperature of the inside air about 1°C to 3 °C. The calculated air exchange In both greenhouses agreed well with the measured values.
Keywords: greenhouse in the tropics, neutral pressure level, air exchange rate.
Diterima: 29 Juni 2007; Disetujui: 19 Agustus 2007
This work is licensed under a Creative Commons Attribution 4.0 International License.Authors who publish with this journal agree to the following terms:
- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).