Weak current College】 【air-conditioning refrigeration capacity and power of difference.

<br> <br> We can easily add air conditioning refrigeration capacity and power consumption confused, because both are in kW for units. Starting from the principle of this article, explains the difference. <br> <br> When you ask a family .member, your air conditioner is with electric power, he may for example, "5 kW," which actually have such high power home? it is clear that he said is refrigeration capacity and power consumption is only about 2 kW, what's going on? .<br> <br> Air-conditioner cooling capacity is from indoor "move out" the transfer of heat by heat and reach the cooling result. <br> <br> Calories used card (cal), kilocalories (kcaI), also known .as kcal kcal. Now thermal power said that unity with "kW" (kw). What relations between them? <br> <br> 1 kW = 860 kcal / hour (exact point 859.85 kcal / h) <br> <br> .In addition, we should take it up with power, you can answer the previous question. We know: <br> <br> Voltage of the unit are: 1 volt (V) = 1 joule / Kullen. <br> <br> .Current is: 1 (A) = 1 Coulomb per second. <br> <br> Power unit: unit power = unit voltage × units current = 1 volt × 1 Ann = (1 j / Coulomb) × (1 Coulomb per second) .= 1 joule / second. Represents the second rate of doing work. <br> <br> But our power is in hours time and power units for Watt (w). Then we will 1 joule per second by multiplying the numerator and denominator, .with 3600: <br> <br> 1 Val = (1 j × 3600) / (1 second × 3600) = 3600 joules / hour. <br> <br> 1 kW = 3600 kJ / h <br> <br> .Now you want to establish contact with heat. We know that hot power equivalent is: <br> <br> 1 joule = 0.24 card (exact point is 0.2389 card). <br> <br> 1 kJ = 2.4 × 10-4 .kilocalories. <br> <br> Thus the heat power is: <br> <br> 1 kW = (3600 kJ × 2.389 × 10-4 kilocalories) / hour = 860 kcal / h. <br> <br> Or: .1 unit = 1 kilowatt · hour = 860 kcal <br> <br> Then the user at the beginning of this article said 5 kilowatt is equal to the number of thermal power?: <br> <br> 5 kW = 5 × 860 .kcal / h = 4300 kcal / h. <br> <br> We understand the relationship between power and heat, the nameplate or instruction on the cooling capacity is calculated from the heat. If the above user's camera, we check the air conditioner's instructions .or nameplate, he said, should be the cooling capacity of 5 kW, 5 kW refrigerating capacity checks of air conditioning, power consumption is only about 2 kW. <br> <br> 5 kW of cooling capacity, their power consumption air conditioning only .2 kW or so, the decision to "COP" or "energy efficiency than" or "performance factor". <br> <br> Energy efficiency ratio formula is: <br> <br> Energy efficiency ratio = cooling capacity / refrigeration operation .consumes power <br> <br> Note that the winter air conditioning heating refrigeration of formulas and the same. <br> <br> Energy efficiency ratio due to manufacturer, model, and conditioner generally 2-3, better done 3 ~ 4. .We should use high-efficiency ratio of air-conditioning, to reduce power consumption. <br> <br> Summary: <br> <br> (1) 1 kW = 860 kcal / h. <br> <br> (2 .) cooling capacity in kW for units, power consumption in kilowatt units. <br> <br> (3) cooling capacity is not equal to the power consumption, the former is greater than the latter, multiples of this decision to the energy efficiency ratio .. <br> <br> (4) energy efficiency ratio = cooling capacity / cooling consumption of electric power to run <br> <br> (5) the higher energy-efficiency ratio, the lower the power consumption. <br> < .br> (6) not to refrigeration capacity and power consumption calculation for multiphase, really, how much power is power consumption. <br> <br> Air conditioning is the working principle of heat pumps, air conditioning units of the rated power is power .time air consumption. Refrigeration power is the unit of time of the delivery of heat energy for air conditioning. Heat units and power units, is causing such a misunderstanding. Take a water pump, for example a 1 kW pump pumping one hour consumption consume 1 .kWh of electrical energy, that is, once electricity, but his pumping is one of several cubic metres of such problems <br> <br> Electric power and thermal power ratio, typically in around 3 <br> <br> <br> < .br> <br> <br>.