Maslak, Katarzyna
- Department of Biosystems and Technology, Swedish University of Agricultural Sciences
Research article2017Peer reviewedOpen access
Thermal energy use for dehumidification of a tomato greenhouse by natural ventilation and a system with an air-to-air heat exchanger
Maslak, Katarzyna; Nimmermark, Sven
Abstract
The aim of the study was to estimate the amount of thermal energy used for dehumidification of a naturally ventilated tomato greenhouse and to estimate how mechanical ventilation with the use of a heat exchanger recovering heat from the exhaust to the supply air may decrease the energy use. Measured use of thermal energy in a naturally ventilated tomato greenhouse was compared to modelled values using Powersim((R)) software. By the help of the model an estimation of the amount of energy used for dehumidification was made for the months April-September. A non-hygroscopic rotary air-to-air heat exchanger was studied, and its temperature and moisture efficiencies were measured. Modelling for leaf area index (LAI) 3.5 and 4.0 m(2) m(-2) indicated that 23 and 29% of the total thermal energy was used for moisture removal respectively. Modelling for the heat exchanger indicated thermal energy savings of 15 and 17% for the same LAI respectively.
Keywords
thermal energy use; greenhouses; humidity; dehumidification; ventilation; rotating heat exchanger
Published in
Agricultural and Food Science
2017, volume: 26, number: 1, pages: 56-66
Publisher: SCIENTIFIC AGRICULTURAL SOC FINLAND
Nimmermark, Sven
- Department of Biosystems and Technology, Swedish University of Agricultural Sciences
- Department of Biosystems and Technology, Swedish University of Agricultural Sciences
SLU Authors
Sustainable Development Goals
SDG7 Affordable and clean energy
UKÄ Subject classification
Agricultural Science
Publication identifier
DOI: https://doi.org/10.23986/afsci.58936
Permanent link to this page (URI)
https://res.slu.se/id/publ/94156