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Story of the double poly greenhouse. The 43 rd ASAE Landmark Dedication to the Air-inflated Double Poly Greenhouse. 2004/6/5. History started. Developed In 1964

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The 43 rd asae landmark dedication to the air inflated double poly greenhouse

The 43rd ASAE Landmark Dedication to the Air-inflated Double Poly Greenhouse

2004/6/5


History started
History started

  • Developed In 1964

  • Roberts, W.J. and D.R. Mears. 1968.Double Covering a Film Greenhouse Using Air to Separate Film Layers. ASAE paper 68-402. Presented at Logan, Utah.

  • Published in Transactions of the ASAE V12, No.1 pp.32, 33, 38.1969.



Advantages of air inflated double poly
Advantages of Air-Inflated Double Poly

  • Low costs

  • Easy installation

  • Great energy conservation

  • Sturdy structure

  • Proper light transmission


Current status
Current Status

  • More than 65% of plastic greenhouse in US is air-inflated double Poly

  • More than half of the plastic greenhouse in the world is air-inflated double Poly

  • Getting more attention in tropical and subtropical regions in some greenhouse for specific applications




The 43 rd landmark of asae
The 43rd Landmark of ASAE









Typhoon attacked greenhouses, but no damage on double-poly

2nd generation

Prof. Roberts prepares the display of thermal curtain model

First double-poly in 1978


Covered with Agron

2nd generation in Tsukuba

Okada, M. and Hayashi, I., 1983: Trial construction of an air-inflated greenhouse and its features, Agric. and Hortic., 58(1), 57-60. (in Japanese)

AgraTech introduced in Tohoku


Current Double-PO Greenhouse

Courtesty Mr. Matsuoka, Kochi Agric Exp Station


Development of a New Air-inflated Greenhouse Design

Project leader: Dr. Shimaji, National Institute of Floricultural Sciences, Tsukuba

  • Three-layer covering (fluorine film, F-Clean) for insulation

  • Collection of solar energy on the roof and storing heated water under the floor

  • Large roof ventilators for natural ventilation

  • Beam string structure

Prototype greenhouse


P

P

P

Collecting Solar Energy into Water

  • To keep the night temperature diffrence between inside and outside at 18 C, additional heating energy was reduced up to 20%.

Sunlight

Water

Ventilation

Heat transfer


Prototype Greenhouse of New design

Air-inflated roof panel with fluorine film

Beam string structure

Water tub

Panel for roof ventilator

2.3 m

3 m

3 m

4 m








Phalaenopsis Typhoon flower forcing required Day/Night Temperature at 25/18 oCAir conditioner is used in Taiwan


Air inflated d ouble poly has been used in flower forcing greenhouse
Air-inflated d Typhoonouble poly has been used in Flower forcing greenhouse

22oC, 78%

18oC

18oC

Reduce condensed water and conserved energy


To prevent flower stake emerge day night temperature need to keep no less than 28 o c
To prevent flower stake emerge, day/night temperature need to keep no less than 28 oC

  • Outdoor T < 28 oC: 72 ~ 84% in plain area of Taiwan

  • Air-Inflated Double Poly can be very helpful in energy conservation

    • as the thermal blanket of an existing greenhouse (glass or poly).

    • as the glazing.


Air-Inflated double Poly can be used in to keep no less than 28 Phalaenopsis greenhouse to conserve energy for the prevention of flower stalk emerging

Cold

blower

Warm


Air inflated double poly in china

Air-inflated Double Poly in to keep no less than 28 China


1989 china
1989 China to keep no less than 28


Air inflated double poly in australia

Air-inflated Double Poly in to keep no less than 28 Australia


Greenhouse manufacturers worldwide
Greenhouse Manufacturers to keep no less than 28 worldwide

  • All Greenhouse manufacturers in US

  • At least one Greenhouse manufacturer in France

  • At least one Greenhouse manufacturer in Japan


Richel corp france
Richel Corp., France to keep no less than 28


Japan
Japan to keep no less than 28


Landmark dedication

Landmark Dedication to keep no less than 28


50 years ago
50 to keep no less than 28 years ago


2004 6 5
2004/6/5 to keep no less than 28


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