This work investigates the techno-economic performance of a hybrid photovoltaic-thermal (PVT) solar-assisted heat-pump system for covering electrical and hot-water demands three-bedroom terraced house in Belfast, United Kingdom with four occupants. combines water-to-water heat pump PVT panels to deliver both electricity hot water domestic consumption. The array provides source low-temperature p...

The low conversion efficiency of solar cells produces large amounts of thermal energy to the cells, and with an increase in the temperature of solar cells, their electrical efficiency decreases. Therefore, a hybrid photovoltaic thermal system improves the overall efficiency of the system by adding thermal equipment to the solar cell and removing excessive heat from these cells. In this paper, w...

Pumping water is one of the most popular technologies solar energy for irrigation or drinking supply. Its performance depends on characteristics site (sunlight, ambient temperature, geographical obstacles), modules, as well as, other equipment (converter and pump). The optimal sizing a photovoltaic pumping system makes it possible to guarantee satisfaction demand throughout period model electri...

this paper deals with a failure investigation of boiler feed pump’s shaft of a steam power plant. boiler feed water pump is a specific type of pump used to pump, feed water into a steam boiler and is one of most important part of steam power plants. feed pumps failure may cause failure of another part of steam power station, therefore keep them safe is an important problem. there are 12 feed pu...

In the system solar power has been used for cultivation. Solar photovoltaic cells convert energy into electricity through (SPV) effect. Generated DC voltage then converted in to AC by pump controller, this is as input of Variable Frequency Drive (VFD). The VFD acts a motor controller that controls submersible varying frequency and its supply. associated with controller. Regulated three phase ou...

The current study presents the design features and photovoltaic requirements of a floating photovoltaic plant (FPVP) whose purpose is to reduce the evaporation from the surface of a water reservoir while generating electricity. A summary of the energy budget method is also introduced to calculate the rate of evaporation from the water reservoir behind 15-Khordad dam. The top of the reservoi...

We investigate the one-parameter Calabi-Yau models and identify families of D5-branes which are associated to lines embedded in these manifolds. The moduli spaces are given by sets of Riemann curves, which form a web whose intersection points are described by permutation branes. We arrive at a geometric interpretation for bulk-boundary correlators as holomorphic differentials on the moduli spac...

The main application of off-grid solar photovoltaic (SPV) systems is water extraction in rural areas where access to the grid restricted. In this application, (PV) and pump system regulation are crucial increase its overall efficiency. context, work presents a simple efficient SPV pumping (SPVWPS). designed based on DC-DC boost converter, three-phase DC-AC inverter, induction motor (IM) coupled...

A proposal for energy management in an off-grid photovoltaic pumping and irrigation system is presented and evaluated for a specific case study. The system is assumed to be based on off-the-shelf components (photovoltaic panels, battery banks, DC/AC converters, relays, submergible pumps, etc.), with a microcontroller-based energy management system, deciding when to disconnect the load from the ...