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The hot tub pump and hot tub heater represent most of the power consumption in a hot tub and vary in use of power depending on their size. [ 4 ] Energy efficiency of portable hot tubs has been studied by the Pacific Gas and Electric Company (PGEC) , [ 5 ] leading to industry responses [ 6 ] and interest from both the California Energy ...
The water pumps were a niche medical product until they were integrated into a recreational hot tub in 1968. As the popularity of hot tubs grew, Jacuzzi created more models that were more advanced. Jacuzzi was family-run until 1979, after which it then changed hands several times, before being bought by its current owner Investindustrial in 2019.
Several different types of pump impellers Flexible impeller of cooling system pump of an outboard engine (1 euro cent coin for comparison, diameter 16.25 mm). An impeller is a rotating component of a centrifugal pump that accelerates fluid outward from the center of rotation, thus transferring energy from the motor that drives the pump to the fluid being pumped.
Since all pumps require well-developed inlet flow to meet their potential, a pump may not perform or be as reliable as expected due to a faulty suction piping layout such as a close-coupled elbow on the inlet flange. When poorly developed flow enters the pump impeller, it strikes the vanes and is unable to follow the impeller passage.
Present-day water-supply systems use a network of high-pressure pumps, and pipes in buildings are now made of copper, [34] brass, plastic (particularly cross-linked polyethylene called PEX, which is estimated to be used in 60% of single-family homes [35]), or other nontoxic material.
The simplest inlet to a centrifugal compressor is typically a simple pipe. Depending upon its use/application inlets can be very complex. They may include other components such as an inlet throttle valve, a shrouded port, an annular duct (see Figure 1.1), a bifurcated duct, stationary guide vanes/airfoils used to straight or swirl flow (see Figure 1.1), movable guide vanes (used to vary pre ...