How many the electric power all devices in the apartment within month consume in the sum, it is already known from meter readings. But the answer to question of what of them make the greatest contribution to this process can be learned only by calculation.
Instruction
1. Make the table consisting of five columns: - serial number of the electric device; - name of the electric device; - the power consumed by the device; - number of hours during which the device works for one day; - amount of the energy consumed per day. For convenience, transfer all capacities expressed in watts to kilowatts - then the consumed energy will turn out in kilowatt-hours.
2. Fill the first four columns of the table. It is possible to learn the power consumption of any of devices from its marking or the instruction. Enter in the table data on all devices, even about such which include no more than several times a month (for example, the hair dryer) or which consume very low power (for example, the electrorazor, the charging device of phone, hours). If the device is used less than an hour a day, all the same change time of its work for simplification of work in hours - the fractional number less than unit will turn out. For any device which is turned on not every day evenly distribute total operating time on days.
3. Take the power of telephone charging devices on which this parameter is not specified for 4 W (0.004 kW). Divide the power consumption of the fridge into two as it works in intermittent duty.
4. On the basis of these third and fourth columns calculate keeping of the fifth. It is convenient to use any program for processing of spreadsheets for this purpose.
5. Put all numbers which are in the fifth column. So you receive the total amount of energy consumed by all devices per day. Increase it by 30, and you receive similar indicator in month. Compare it to real.
6. Analyze according to the table what use of devices it is the most rational to reduce without prejudice to comfort, but with noticeable reduction of consumption of power. Also reveal, lamps in what lamps need replacement by energy saving first of all. Think also of to using needlessly powerful devices when it is possible to manage low-power (to go on-line from the tablet, to watch figurative TV instead of stationary).