The price of a refrigerator sold in shopping malls is 2190 yuan per unit, and the daily power consumption is 1 kwh, while the price of B refrigerator is higher than that of a refrigerator The A-type refrigerators sold in shopping malls are priced at 2190 yuan per unit, with a monthly power consumption of 1 The price of B refrigerator is 10% higher than that of a refrigerator, However, the daily power consumption is 0.55 kilowatt hour, and the shopping mall will turn A-type refrigerator into a refrigerator If you only consider the price and power consumption, how much discount at least It's cost-effective for consumers to buy? (the service life is 10 years, 365 days per year, 4 yuan per kilowatt hour)

The price of a refrigerator sold in shopping malls is 2190 yuan per unit, and the daily power consumption is 1 kwh, while the price of B refrigerator is higher than that of a refrigerator The A-type refrigerators sold in shopping malls are priced at 2190 yuan per unit, with a monthly power consumption of 1 The price of B refrigerator is 10% higher than that of a refrigerator, However, the daily power consumption is 0.55 kilowatt hour, and the shopping mall will turn A-type refrigerator into a refrigerator If you only consider the price and power consumption, how much discount at least It's cost-effective for consumers to buy? (the service life is 10 years, 365 days per year, 4 yuan per kilowatt hour)

20% off

The price of type a refrigerator sold in shopping malls is 2190 yuan per unit, and the daily power consumption is 1 degree, while the price of type B energy-saving refrigerator is 10% higher than that of type a refrigerator, but the daily power consumption is 0.55 degree? (calculated according to the service life of 10 years, 365 days per year and 0.40 yuan per kilowatt hour)

If a supermarket sells a refrigerator at a discount of X, it will be cost-effective for consumers to buy it. According to the question, it is 2190 × 10 + 365 × 10 × 1 × 0.4 ≤ 2190 × (1 + 10%) + 365 × 10 × 0.55 × 0.4, that is 219x + 1460 ≤ 2409 + 803. Solving this inequality, it is cost-effective for consumers to buy a refrigerator at least at a discount of 20%

The label of the refrigerator says electricity consumption (kWh / 24h) 0

That is, the active power consumption within 24 hours is 0.59 kwh Adopt!

My fridge says electricity consumption: kwh / 24h 0.58, how many kwh should my fridge use every day?

Refrigerator power consumption: (non laboratory measurement) under the ambient temperature of 25 ℃ (for Sn, N, St type refrigerators), the relative humidity is 45% - 75%, the temperature of the refrigerator is kept at 5 ℃, the temperature of the refrigerator is kept at - 18 ℃, and a certain number of items are placed in the refrigerator. When the temperature reaches the set requirements, close the refrigerator door, and the total energy consumption of the refrigerator runs stably for 24 hours
According to the national standard 8059.2-1995-5.4.3, 115% of the power consumption in actual use (meeting the above conditions) is normal. When the refrigerator is in use, due to the rise of ambient temperature, the energy consumption required for refrigerated and frozen food storage, the change of temperature setting, the number of door opening, mechanical wear, the decrease of refrigeration efficiency, the decrease of heat preservation performance, etc, To increase the energy consumption of refrigerators, it is impossible to accurately calculate. To be much higher than the nominal value, in order to obtain the actual power consumption, a separate watt hour meter must be added