נגישות
menu      
חיפוש מתקדם
תחביר
חפש...
הספר "אוצר וולקני"
אודות
תנאי שימוש
ניהול
קהילה:
אסיף מאגר המחקר החקלאי
פותח על ידי קלירמאש פתרונות בע"מ -
Development of a microwave system for greenhouse heating
Year:
2000
Source of publication :
Acta Horticulturae
Authors :
אלעד, יגאל
;
.
טייטל, מאיר
;
.
שקליאר, אלכסנדר
;
.
Volume :
534
Co-Authors:
Teitel, M., Institute of Agricultural Engineering, A.R.O., Volcani Center, P.O. Box 6, 50250 Bet Dagan, Israel
Shklyar, A., Institute of Agricultural Engineering, A.R.O., Volcani Center, P.O. Box 6, 50250 Bet Dagan, Israel
Dikhtyar, V., Microwave Laboratory, Faculty of Engineering, Tel-Aviv University, 69978 Ramat-Aviv, Israel
Jerby, E., Microwave Laboratory, Faculty of Engineering, Tel-Aviv University, 69978 Ramat-Aviv, Israel
Elad, Y., Department of Plant Pathology, A.R.O., Volcani Center, P.O. Box 6, 50250 Bet Dagan, Israel
Facilitators :
From page:
189
To page:
195
(
Total pages:
7
)
Abstract:
Greenhouse heating in cold and mild climates is usually by traditional heating methods such as hot-water and hot-air systems. In both methods a certain amount of energy is wasted on heating the greenhouse air and construction, which results in an increase in heat losses to the surroundings. An alternative heating method, which is of interest because of its potential to rapidly heat the plants with less heat losses to the surrounding is microwave heating (MWH). This was tested in the present study, in a small scale greenhouse. A 500 Watt (maximum power) microwave generator at a frequency of 2.45 GHz was used to heat mature tomato and pepper plants. For reference and comparison, an identical nearby greenhouse was heated with hot air. The experimental results showed that it is possible to heat the plants with microwaves without visible damage, and no increase in susceptibility to gray mold (Botrytis cinerea). During the heating period, the leaves were always warmer than the greenhouse air. Hence, it can be expected that the risk of occurrence of humidity promoted diseases (e.g. those that are caused by B. cinerea, Fulvia fulva and Sclerotinia sclerotiorum) will be reduced. In addition, the greenhouse air did not warm up and its temperature was nearly constant. It appears that the non-uniformity in temperature distribution with MWH was not much worse than with the hot-air heating. The energy required for MWH was about 0.55 of that required by hot-air heating.
Note:
Related Files :
Botrytis
Diseases
Energy
greenhouse
heating
Microwave
Sclerotinia sclerotiorum
Sclerotinia sclerotiorum, Diseases
עוד תגיות
תוכן קשור
More details
DOI :
Article number:
0
Affiliations:
Database:
סקופוס
Publication Type:
מאמר מתוך כינוס
;
.
Language:
אנגלית
Editors' remarks:
ID:
22486
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:52
Scientific Publication
Development of a microwave system for greenhouse heating
534
Teitel, M., Institute of Agricultural Engineering, A.R.O., Volcani Center, P.O. Box 6, 50250 Bet Dagan, Israel
Shklyar, A., Institute of Agricultural Engineering, A.R.O., Volcani Center, P.O. Box 6, 50250 Bet Dagan, Israel
Dikhtyar, V., Microwave Laboratory, Faculty of Engineering, Tel-Aviv University, 69978 Ramat-Aviv, Israel
Jerby, E., Microwave Laboratory, Faculty of Engineering, Tel-Aviv University, 69978 Ramat-Aviv, Israel
Elad, Y., Department of Plant Pathology, A.R.O., Volcani Center, P.O. Box 6, 50250 Bet Dagan, Israel
Development of a microwave system for greenhouse heating
Greenhouse heating in cold and mild climates is usually by traditional heating methods such as hot-water and hot-air systems. In both methods a certain amount of energy is wasted on heating the greenhouse air and construction, which results in an increase in heat losses to the surroundings. An alternative heating method, which is of interest because of its potential to rapidly heat the plants with less heat losses to the surrounding is microwave heating (MWH). This was tested in the present study, in a small scale greenhouse. A 500 Watt (maximum power) microwave generator at a frequency of 2.45 GHz was used to heat mature tomato and pepper plants. For reference and comparison, an identical nearby greenhouse was heated with hot air. The experimental results showed that it is possible to heat the plants with microwaves without visible damage, and no increase in susceptibility to gray mold (Botrytis cinerea). During the heating period, the leaves were always warmer than the greenhouse air. Hence, it can be expected that the risk of occurrence of humidity promoted diseases (e.g. those that are caused by B. cinerea, Fulvia fulva and Sclerotinia sclerotiorum) will be reduced. In addition, the greenhouse air did not warm up and its temperature was nearly constant. It appears that the non-uniformity in temperature distribution with MWH was not much worse than with the hot-air heating. The energy required for MWH was about 0.55 of that required by hot-air heating.
Scientific Publication
You may also be interested in