#Watts to hp full#

The wiring needs to be correct, and we need to verify that the system is achieving the proper airflow in the first place. Installation and commissioning are other things we need to consider when thinking of the HVAC equipment systemically. When you control the source of your fresh air ventilation to meet ASHRAE 62.2, filtration may further help control the quality of the air that comes in. However, the air that leaves the building must be replaced, and we often donвЂ™t control where that air comes from. Ventilation also matters, especially since many homes rely on exhaust-only ventilation. Building envelope and duct leakage will significantly affect HVAC performance and occupant comfort. We need to assess the building envelope and consider how the HVAC system interacts with it. Duct design, drain placement, and equipment placement all matter, and we can only do so much to mitigate factors of poor design. System design plays a major role in performance. The key to systems thinking is to think outside the appliance.

Systems thinking allows us to solve problems and address customersвЂ™ comfort holistically instead of focusing on just the equipment. To avoid confusion, make sure you understand these different units or ways of measuring and expressing power.Д®ric Kaiser joins the podcast to talk about systems thinking in HVAC. Of the total 2,487 watts of power consumed by the motor, only 3.0 x 746 watts/HP = 2,238 watts are converted to useful mechanical shaft power. For example, a 3 HP motor that is fully loaded and is operating at 90% efficiency will consume a total of 3 HP/0.90 = 3.33 HP in electricity, or 3.33 HP x 746 watts/HP = 2,487 watts. The rest (the majority) of the wattage provides useful mechanical shaft power to the load that is being driven. Electric motors do not operate at 100% efficiency thus, some of the wattage consumed by a motor converts directly to heat. One mechanical HP is equivalent to ~746 watts. Thus, a motor with the capability of 3 HP may be driving a load that only requires 2 HP.Д«rake horsepower (BHP) refers to the actual mechanical horsepower received at the shaft of the driven machine, such as a fan, pump, compressor, etc.ДЄ watt is also a unit of power. The load required by fans, pumps, and compressors usually depends on the fan or pumpвЂ™s design, the flow rate it is handlingВ (cfm, gpm), and the pressures that are developed.

#Watts to hp full#

Motors are not always delivering full nameplate HP to the load they are driving. Motor nameplate HP indicates the amount of mechanical HP a motor can safely deliver via its shaft without overloading/overheating. This example helps us understand why it takes approximately five people to do the work that one horse can do. 33,000 ft x lbs/minute/7 feet x 200 lbs = 23.6 barbells/minute. Every minute, 24 barbells, 200 pounds each, lifted 7 feet. To do work at the rate of 1 HP, you would have to lift ~24 of these barbells 7 feet every minute. Put another way, imagine continuously lifting an endless supply of 200 lb barbells from the floor up to a height of 7 feet (clean & jerk). He is exhausted after powering the toaster just a few minutes to toast 1 piece of bread. There is an interesting video of an Olympic cyclist on a stationary bike generating enough power to operate a toaster at ~700+ watts (746 watts = 1 HP).

A human cannot sustain doing work at the rate of 1 HP for very long. A horse can do work at this rate continuously without being overloaded. Horsepower (HP) is defined as doing work at the rate of 33,000 ft x lbs/minute. Some units of measuring power are watts, kilowatts, HP, etc. Power = time rate of doing work (work/time). Work = distance in feet x force in pounds, both applied in the same direction. Let us start with simple definitions of work, power, and horsepower. Brake horsepower (BHP), motor nameplate HP, and the actual electrical power (watts) a motor will consume are different but related concepts.