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Articles

DETERMINATION OF AIR EXCHANGE FIGURES WITH REGARD TO CLOSED GREENHOUSES

Article number

76_46

Pages

301 – 304

Language

Abstract

This is done by means of a fan pressing air into the interior of a not airtight greenhouse.
The amount of exchanged air is measured by equipping the fan with a wind-tunnel; it depends on the difference of pressure between inside and outside the greenhouse.
The difference of pressure and air exchange figures are applied to the natural conditions in case of different air speeds.

Publication

Symposium on More Profitable Use of Energy in Protected Cultivation

Authors

H. Gudehus

Keywords

Full text

https://doi.org/10.17660/ActaHortic.1978.76.46

Online Articles (60)

2. TOWARDS AN ECONOMICS OF ENERGY IN HORTICULTURE

H. Storck

3. A THEORY FOR OPTIMALIZATION OF PRIMARY PRODUCTION IN PROTECTED CULTIVATION: – I. INFLUENCE OF AERIAL ENVIRONMENT UPON PRIMARY PLANT PRODUCTION

H.Z. Enoch

4. A THEORY FOR OPTIMALIZATION OF PRIMARY PRODUCTION IN PROTECTED CULTIVATION: – II. PRIMARY PLANT PRODUCTION UNDER DIFFERENT OUTDOOR LIGHT REGIMES

H.Z. Enoch

5. DEVELOPMENTS FOR MAKING OPTIMAL USE OF THE GREENHOUSE AREA

G.H. Germing

6. ENGINEERING CONSIDERATIONS OF ENERGY PROBLEMS IN PROTECTED CULTIVATION

J.N. Walker | G.A. Duncan

7. ECONOMIC ASPECTS OF BETTER USE OF ENERGY IN PROTECTED CULTIVATION

Adri J. de Visser

8. THE POSSIBLE USE OF REMOTE SENSING FOR LOCALISATION OF PROTECTED CULTIVATION IN RELATION TO ENERGY

J.O. Mattsson

9. INFLUENCE OF CLIMATIC FACTORS UPON COSTS OF FUEL AND LOCATION OF GLASSHOUSES

W. Ciechomski

10. THE ADVANTAGE OF THE NORTHERN LATITUDES FOR THE UTILIZATION OF WASTE HEAT FOR GREENHOUSES AND SOIL WARMING

D.H. Dinkel

11. VERTICAL TEMPERATURE GRADIENTS AND GREENHOUSE ENERGY ECONOMY

K.W. Winspear

12. MICROCLIMATE IN GREENHOUSES

B. Elsner

13. DESIGN AND CLIMATE CONDITIONS OF A GROWING ROOM

J. Meyer

14. DYNAMIC MODELLING OF GREENHOUSE CLIMATE USING A MINICOMPUTER

G.P.A. BOT | J.J. VAN DIXHOORN

15. ADAPTIVE CONTROL OF A GLASSHOUSE HEATING SYSTEM

A.J. Udink ten Cate | J. van de Vooren

16. POSSIBILITIES OF LOW-ENERGY REQUIRING VEGETABLES

F. Benoit | N. Ceustermans

17. SHORTENING OF THE PERIOD BETWEEN PLANTING OUT AND HARVESTING

E. Kooistra

18. INCREASE IN PHOTOSYNTHETIC RATE OF VEGETABLE CROPS WITH CO₂-ENRICHMENT

K. Takahashi

19. RESPONSE OF TOMATOES TO LOW NIGHT-HIGH DAY TEMPERATURES AND CARBON DIOXIDE ENRICHMENT

R.A.J. White

20. PROGRAMMING OF NIGHT TEMPERATURE IN RELATION TO THE DIURNAL PATTERN OF THE PHYSIOLOGICAL STATUS OF THE PLANT

H. Challa

21. ESSAIS DE CHAUFFAGE DE SERRES PAR CIRCULATION D’EAU TIEDE DANS DES GAINES POSEES AU SOL

M. Baille | E. Rassent | C. Wacquant | M. Musard

22. MODIFICATIONS MICROCLIMATIQUES DANS L’AIR ET DANS LE SOL DUES AU CHAUFFAGE DU SOL PAR EAU TIEDE CIRCULANT DANS DES TUYAUX ENTERRES

A. Baille | M. Mermier

23. BENEFITS DRAWN FROM THE SOIL HEATING IN PROTECTED CULTIVATION

P.D.I. Nisen | Ir. M. Custers | Ir. M. Gerard

24. THE EFFECT OF SOIL TEMPERATURE WHEN ASSOCIATED WITH LOW AIR TEMPERATURES ON THE CROPPING OF EARLY TOMATOES

D.A.G. Jones | I. Sandwell | C.J.W. Talent

25. HEATED HYDROPONIC SOLUTIONS AS AN ENERGY SAVING TECHNIQUE

J.V. Morgan | R. O'Haire

26. GREENHOUSE HEATING WITH SUN ENERGY

J. Damrath

27. THE SOLAR POND AS AN ALTERNATIVE ENERGY SOURCE FOR GREENHOUSES

Ted H. Short | P. C. Badger | Warren L. Roller

28. PERFORMANCE OF A PRACTICAL SOLAR GREENHOUSE HEATING SYSTEM

D.R. Mears | W.J. Roberts | J.C. Simpkins

29. A LOW-ENERGY GREENHOUSE

G. Gustavsson | B. Landgren

30. SOLAR SPACE HEATING OF A HOUSE AND ATTACHED GREENHOUSE

C.C. Smith | S. Bedford

31. A YEAR ROUND PERFORMANCE STUDIES ON THE NEW PROCESS OF “SOLAR GREENHOUSE”. PHYSICAL AND AGRONOMICAL RESULTS

J.P. Chiapale

32. A SIMULATION MODEL FOR ENERGY STORAGE AND SAVINGS OF A FLUID-ROOF SOLAR GREENHOUSE

C.H.M. Van Bavel | J. Damagnez

33. POSSIBILITIES FOR THE REDUCTION OF THE ENERGY CONSUMPTION IN GREENHOUSES

P. J. Karai

34. UTILIZING TURBINE EXHAUST GASES FOR HEATING AND CARBON DIOXIDE ENRICHMENT OF GREENHOUSES

E.A. Maginnes | M.O. Haukeness | G.H. Green | K.E. Miller

35. ENERGY CONSERVATION BY VENTILATING A GREENHOUSE WITH DEEP-MINE AIR

J.N. Walker | J.W. Buxton

36. SOME RESULTS FROM THE HEATING OF GREENHOUSE WITH POWER STATION CONDENSER COOLING WATER

J. Statham

37. EXPERIMENTATION DE POMPE A CHALEUR HEAT PUMP EXPERIMENT EAU-EAU SOUS SERRE

Y. CORMARY | J.L. DALLE

38. ENERGY OPTIMIZING IN COLD STORAGE

P. Åström

39. CALCULATION MODEL WITH REFERENS TO THE ENERGY ECONOMY IN GREENHOUSES

J. Alemo | S.A. Svensson

40. THE ROLE OF TRANSPARENCY ON THE RADIANT HEAT LOSS FROM THE PLANT CANOPY IN PROTECTED SPACES

M.G. Amsen

41. HEAT CONSERVATION IN GLASSHOUSES WITH ALUMINISED THERMAL SCREENS

B. J. Bailey

42. UK DEVELOPMENTS IN THE USE OF THERMAL SCREENS FOR FUEL SAVING IN COMMERCIAL GREENHOUSES

B.R. Smith

43. THERMAL SCREENS FOR GLASSHOUSE TOMATOES

T.V. Sims

44. THE EFFECT OF INTERNAL THERMAL SCREENS IN GLASSHOUSES ON HEAT LOSS AND PLANTGROWTH. – I. DESCRIPTION OF THE TEST FACILITY WITH PRELIMINARY TECHNICAL RESULTS:

P. Konradsen | T. Vest Hansen | J. Thule Kristensen | J. Bjerne Ditlevsen | M.G. Amsen

45. THE EFFECT OF THERMAL SCREENS IN GLASSHOUSES ON HEAT LOSS AND PLANT-GROWTH – II. THE ENVIRONMENT AND THE PLANT PRODUCTION

O. Christensen | H. Andersen | A. Andersen | E. Moes

46. THE EFFECT OF THERMAL SCREENS IN GLASSHOUSES ON HEAT LOSS AND PLANTGROWTH: III. ENERGY BUDGET

M.G. Amsen | P. Konradsen | J. Thule Kristensen | T. Vest Hansen

47. DETERMINATION OF AIR EXCHANGE FIGURES WITH REGARD TO CLOSED GREENHOUSES

H. Gudehus

48. ENERGY CONSERVATION AND PLANT GROWTH BY USING DOUBLE PLASTIC ON GLASS GREENHOUSES¹

W. L. Bauerle | Ted H. Short

49. THE INFLUENCE OF SINGLE AND DOUBLE SHELTERS ON THE CLIMATE AND HEAT CONSUMPTION OF GREENHOUSES.

H. Tantau

50. MEASUREMENTS OF CLIMATE AND HEAT CONSUMPTION UNDER DOUBLE GLASS

K. Schockert | Chr. von Zabeltitz

51. GREENHOUSE COVERS: HEAT REQUIREMENT AND INSOLATION

W.J. Sherry | K.L. Goldsberry | J.J. Hanan

52. EIGHT YEARS PRACTICAL EXPERIENCE WITH THE ACRYLIC DOUBLE SKIN SHEET IN GREENHOUSES

K. Kolbe

53. EVALUATION OF DOUBLE-CLAD POLYTHENE GREENHOUSES FOR ENERGY SAVING IN EARLY TOMATO PRODUCTION

T. O'Flaherty | M.J. Maher

54. WINDBREAKS: THEIR POTENTIAL IN CONSERVING ENERGY

J.W. Sturrock

55. CONTRIBUTION TO THE STUDY OF WINDBREAKS IN THE WIND TUNNEL

G.A. Karantounias

56. SHELTER AND THE EFFECT OF WIND ON THE HEAT LOSS FROM GREENHOUSES

G.F. Sheard

57. ENERGY SAVING TRENCH-HOUSES

Y. Mihara | M. Hayashi

58. NEW DEVELOPEMENTS IN SHADING PLASTIC GREENHOUSES

M. Grafiadellis | S. Kyritsis

59. THE ROLE OF PLASTICS TOWARDS A MORE PROFITABLE USE OF ENERGY IN PROTECTED CULTIVATION

J.-Cl. Garnaud

60. DESIGNS AND CONSIDERATIONS FOR GREENHOUSES IN THE UNITED STATES NOW AND IN THE FUTURE

W.J. Roberts | D.R. Mears