Wh refers to the amount of electricity, which is a quantity directly proportional to voltage, current, and time. MAh is usually used as an indicator of battery charge and discharge. It is an indicator proportional to the battery's charge (discharge) current and time. To make it comparable or convertible to Wh, the battery voltage must also be known.
For example, if it is 4.2V, then it can be said that the relationship between the discharge time and current of 26Wh of electricity at 4.2V is 26Wh/4.2V=26VAh/4.2V=6.19Ah=6190mAh.
Extended information
The electric charge of an electron is e=1.60*10-19. Experiments have pointed out that the charge of any charged particle is either equal to the charge of an electron or a proton, or an integer multiple of their charge, so the 1.60*10-19 library is called the elementary charge.
Electricity can also refer to the amount of electrical energy required by electrical equipment, which is also called electrical energy or electrical power. The unit of electrical energy is kilowatt·hour (kW·h). W=Pt (W represents electric energy; P represents active power, the unit is kW; t represents time, the unit is hours h). The electricity here is also divided into active electricity and reactive electricity. The unit of reactive power is kVar·h.
Building electrical design principles
1. Satisfy the building’s use functions. That is to meet the illumination, color temperature and color rendering index of the lighting;
to meet the temperature and fresh air volume of the comfort air conditioner, that is, comfortable and hygienic; to meet the unobstructed upper, lower, left and right transportation channels; to meet special process requirements, such as Electricity consumption for some electrical facilities in entertainment venues, process lighting and electricity consumption in exhibition halls, etc.
2. Consider actual economic benefits. Energy conservation should consider the actual economic benefits according to national conditions. Energy conservation should not consume excessive investment and increase operating costs. Instead, part of the increased investment should be recovered within a few years or a shorter period with the operating costs reduced by energy saving. .
3. Save unnecessary energy consumption. The focus of energy conservation should be to save unnecessary energy consumption.
First find out where the energy consumption is not related to the function of the building, and then consider what measures to take to save energy. For example, the power loss of the transformer and the active power loss on the power transmission line are useless energy losses. Another example is the large-scale and wide-area lighting capacity. Advanced technology should be used to reduce energy consumption.
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