Abstract
In recent years, with the development of photovoltaic system and photo-thermal system technology, hybrid photovoltaic-thermal (PVT) technology has been a breakthrough in many aspects. This paper describes the movable hybrid PVT system from the aspects of appearance structure, energy flow, and control circuit. The system is equipped with rolling wheels and the simulated light sources also can be removed so that the system can be used in the outdoor conditions. The movable system is also suitable for the PVT system and its related applications without any external power supply. This system combines two technologies: photovoltaic power generation and photo-thermal utilization. The first part of the power supply is for the systems own output power supply, and the second part is for generating thermal energy. The two separate parts can be controlled and monitored respectively through the control circuits and the touch screens. The experimental results show that the system can generate 691 kWh electric energy and 3047.8 kWh thermal energy each year under normal working conditions. The efficiency of the proposed movable hybrid PVT system is calculated to be approximately 42.82% using the revised equations that are proposed in this paper. Therefore, the movable hybrid PVT system can meet the daily demands of hot water and electricity power in remote areas or islands and other non-grid areas. It also can be used to conduct experiment tests for the PVT system.
Highlights
The use and development of solar energy began as early as 1959, when the patents for photovoltaic (PV) and photo-thermal (PT) technologies first appeared in United States [1,2]
The efficiency of the hybrid PVT system can be calculated according to Equation (5): Eh = ηPT /ηheater + ηPV /ηpower where Eh is the total efficiency for the hybrid PVT system, %; ηpower is the electric power generation efficiency for a conventional system, %; it usually taken as 0.38 in the recent research [13]; and ηheater is the efficiency of a conventional heating system, %
The experimental results show that PV power generation can generate 691 kWh of electricity per year and PT thermal utilization can generate 3047.8 kWh of thermal energy per year
Summary
The use and development of solar energy began as early as 1959, when the patents for photovoltaic (PV) and photo-thermal (PT) technologies first appeared in United States [1,2]. Researchers have carried out a large number of design and development for the hybrid photovoltaic-thermal (PVT) system. Movable solar systems have been designed and tested in different studies. A mobile PV hybrid power system for use in remote areas was designed by Prompinit et al [14]. Tested a mobile renewable house using a PV/wind/fuel cell hybrid power system. Photovoltaic and wind energy are used as primary power sources for the mobile house system. The actual efficiency and power generation of the proposed system are obtained by testing the system and analyzing the data. The comparisons between the proposed study and the former study are discussed
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