| Author | Wei, Zhang |
| Call Number | AIT Thesis no. AE-94-02 |
| Subject(s) | Mushroom culture
|
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. AE-94-02 |
| Abstract | An automatic control system designed earlier was modified and redesigned to
integrally control the temperature and relative humidity inside the mushroom house. The air
state inside the house were measured by a temperature sensor and a humidity sensor. A
controller processed these values and sent control signals to corresponding correcting units. A
heating unit and a water spraying unit corrected temperature. The water spraying unit and a
ventilating unit maintained desired relative humidity. A blower unit circulated processed air
inside the house.
The study on the microclimate inside the house without control found that the air state
was affected by heat transfer mainly through the house roof. Big differences of temperature and
relative humidity were found in a vertical direction. In a horizontal plane, these differences
were small.
Experiments show that the system could generally fulfill control requirements. The
low limit of the desired temperature (Tl) was controlled satisfactorily. The upper limit of the
temperature (Tu) was controlled except when the ambient temperature exceeded 3 °C or more
than Tu. The relative humidity was controlled within its optimal range. The circulating unit
reduced variation of the temperature and relative humidity within the house. The desired
temperature and relative humidity ranges were set according to the biological requirement of
the mushroom production easily.
The control system developed in this study can be directly used on small mushroom
farms. |
| Year | 1994 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. AE-94-02 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Agricultural and Food Engineering (AE) |
| Chairperson(s) | Singh, Gajendra |
| Examination Committee(s) | Salokhe, V. M.;Jindal, V. K.;
Winden, J. Van |
| Scholarship Donor(s) | The Government of Japan |
| Degree | Thesis (M. Eng.) - Asian Institute of Technology, 1994 |