A hybrid Photovoltaic/Thermal (PV/T) solar system integrates photovoltaic and solar thermal technologies into one single solar energy device, with dual generation of electricity and heat energy. The aim of the present study is to evaluate the potential for introduction of the PV/T technology into Northern China. For this purpose, outdoor experiments were conducted on a prototype of a PV/T water...

The femtosecond energy diffusion sensor is presented as a non-contact tool for the use in the characterization of thin film hydrogenated amorphous silicon (a-Si:H) photovoltaic cells. The sensor is based on the pump-probe technique and when used with the appropriate models, this non-contact, non-destructive tool is shown to be capable of measuring important material characteristics of each laye...

Water supply system consumes large amount of power load during water treatment and transportation of purified water. Many energy conserving high efficiency materials such as DC motor and LED light have recently been introduced to water supply system for energy conservation. This paper performed empirical analysis on BLDC and AC motors and comparatively analyzed the change in power according to ...

This paper proposes the re-planning operation method using Tabu Search for direct current (DC) smart house with photovoltaic (PV), solar collector (SC), battery and heat pump system. The proposed method is based on solar radiation forecasting using reported weather data, Fuzzy theory and Recurrent Neural Network. Additionally, the re-planning operation method is proposed with consideration of s...

We present a comparative study of ultrafast photoexcited state relaxation in pentacene single crystals and in pure and C60-doped pentacene films using optical pump-probe spectroscopy. The photoinduced absorption spectra in pentacene crystals is consistent with a dominant singlet–triplet fission decay channel for above-gap excitation. This decay channel is suppressed in thin films and even furth...

The purpose of this study was to determine and compare the performances of conventional and heat pump systems for energy and water conservation in open and confined greenhouse systems. Conventional gas furnaces and evaporative cooling, respectively, provided heating and cooling in the conventional system. In the heat pump systems, gas-fired heat pump units provided both heating and cooling. The...

0196-8904/$ see front matter 2011 Elsevier Ltd. A doi:10.1016/j.enconman.2011.11.011 ⇑ Corresponding authors. Tel./fax: +86 551 3607367 E-mail addresses: [email protected] (P. Gang), j Heat-pipe photovoltaic/thermal (HP-PV/T) systems can simultaneously provide electrical and thermal energy. Compared with traditional water-type photovoltaic/thermal systems, HP-PV/T systems can be used in cold ...

The work consists of the development a market-friendly 600 W photovoltaic battery-less water pumping system. system is composed four 280 Wp solar panels, an auxiliary 10 panel, three-phase converter and ½ horsepower (hp) submersible pump. electronic stage involves resonant DC-DC in series with voltage source inverter. novelties this are related to use fixed duty-cycle frequency for application,...