Cavitation is one of the most well-known process faults that may occur in different industrial equipment especially centrifugal pumps. Cavitation also may happen in water pumps and turbines. Sometimes cavitation has been severe enough to wear holes in the impeller and damage the vanes to such a degree that the impeller becomes very ineffective. More commonly, the pump efficiency will decrease s...

The conventional handpump is the most popular technology choice for improved potable water supplies in rural sub-Saharan Africa. To date, however, it has failed to deliver satisfactory levels of sustainability, largely due to inadequate maintenance capacity. An alternative option to standardised imported handpumps is the locally manufactured rope-pump, which is considerably cheaper and easier t...

An evaluation of a variety of efficient water heating strategies for an all-electric single family home located in a mixed-humid climate is conducted using numerical modeling. The strategies considered include various combinations of solar thermal, heat pump, and electric resistance water heaters. The numerical model used in the study is first validated against a year of field data obtained on ...

The performance of a photovoltaic solar water pumping system (PVSWPS) promising in heating has been studied experimentally. design array configuration can affect the (PVSWPS), pump characteristic, flow rate and overall efficiency. aim present work is to determine an optimum that supply with optimal amount energy. Three different configurations have tested (4S, 2S ×2P 4P). experiments carried ou...

Toshka Project is one of the major and national irrigation projects planed to increase the cultivated areas in the south valley, improve the opportunity for better jobs and increase the income for the country. The project impacts and consequences should be studied carefully to maximize the intended benefits and reduce any expected side effects. This paper is proposed to study the effect of the ...

Laura Island, which is located about 50 km away from downtown, is a source of water supply in Majuro atoll, which is the capital of the Republic of the Marshall Islands. Low and flat Majuro atoll has neither river nor lake. It is very important for Majuro atoll to ensure the conservation of its water resources. However, upconing, which is the process of partial rising of the freshwater-saltwate...

A photovoltaic reactor was designed for artificial photosynthesis, based on the reactions involved in high energy hydrogen atoms, which were produced from water electrolysis. Water and CO2, under the conditions studied, were converted to oxalate (H2C2O4) and a polymer. This was the first time that the oxalates and oxalate-based polymer were produced from the artificial photosynthesis process.

In Algeria, there are many isolated sites which are not yet connected to the conventional electrical grid and face severe problems of water for domestic consumption and irrigation purposes. There are some photovoltaic water pumping system (PVWPS) which are situated in remote areas. Due to the high cost of setting up and maintaining a large number of PVWPS, we present in this project a methodolo...

To minimize the total energy consumption of a cooling tower-assisted heat pump (CTAHP) system in cooling mode, a model-based control strategy with hybrid optimization algorithm for the system is presented in this paper. An existing experimental device, which mainly contains a closed wet cooling tower with counter flow construction, a condenser water loop and a water-to-water heat pump unit, is ...