ฉันทนา พันธุ์เหล็ก. Hybrid Photovoltaic Thermal-Desiccant Integrated Infrared Drying System. Doctoral Degree(Energy Technology). King Mongkut's University of Technology Thonburi. KMUTT Library. : King Mongkut's University of Technology Thonburi, 2555.
Hybrid Photovoltaic Thermal-Desiccant Integrated Infrared Drying System
Abstract:
An effect of drying time on energy consumption and product quality is the main
problem for a drying system. So, new technology drives are used to improve system
efficiency. The reducing energy consumption of drying were required the utilization of
energy resources. Consequently, an attention towards alternative energy solutions, as
the hybrid drying technology has recovered attention.
The aim of this research is to study a simulation system and design for a Hybrid PV/T
assisted desiccant integrated HA-IR drying system (HPIRD) which has two
components: a photovoltaic thermal air collector (PVAC), and a desiccant silica gel bed
(DB). The PVAC and DB were used for improved performance of the drying system.
PVAC have been modified with fins (PVACAF) and DB has three different silica gel bed
shapes (v-shape, c-shape and plate). The designed simulation system used TRNSYS and
CFX programs with new PVAC and DB components. The optimum two new models
from simulation were used to develop a new drying system and compared it with the
pre-experimental results. The simulation results indicated that the PVACAF because of
fin system can be increase thermal and electrical efficiency. The v-shape DB was
suitable, due to it has least pressure drop.
Next, the HPIRD used the optimal case to develop a system. The dryer was used to dry
2 kg ginger on drying temperature of 60?C and a 0.022 kg/s flow rate. Experimentation
was study in drying kinetics, energy consumption, quality, economic and environment.
Which quality and environment analyses were used High performance liquid
chromatography (HPLC) and clean development mechanism (CDM) technique. The
experimental results were used to compare drying efficiency of each operation drying
mode namely HA-IR and HPIRD compare to HA drying.
The drying experimental results indicated that the HPIRD drying test was reduced the
drying time is 44% with less energy consumption (56%) compared to hot air drying
mode. The total energy consumption for dried ginger of moisture content reached to
final 13 %db from 540 %db. In term of product quality it was observe that HPIRD
percentage with highest of main pungent principles (gingerol and shogaol) compare
with those dried by HA and HA-IR. HPIRD drying also gave better results over hot air infrared
drying. Finally, in this economical analysis showed that the payback period of
HPIRD is 1.35 years. Moreover, environment impact was consider CO2 emission of
overall ginger drying production. The process could be reduces direct CO2e 3,168.52
tCO2/year on grid electricity supply by used hybrid system. Therefore, the proposed
HPIRD concept seems to be an interesting new alternative for drying system which
considers effect based on results of the energy consumption, quality, and environment.