Weak current College】 【room air-conditioning related terms explained-Power By】 【China power house network.

<br> 1, sensible heat and latent heat of sensible heat: objects in the heating or cooling process, the temperature is raised or lowered without altering its original phase the desired amount of heat absorbed or released, known as "sensible heat." It .can make it obvious changes feel hot and cold, usually available thermometer measurement. (Such as the water rises from 20 ° c to 80 ° c are absorbed into the heat of the sensible heat, it is called. Latent heat: phase change material took .place (State variations), the temperature does not change the heat absorbed or released is called the "latent". Substances by low-energy state transitions for the absorption of high energy State, on the other hand the latent heat release of latent heat. .For example, boiling is part of the latent heat absorption to overcome the Intermolecular attraction, another part of the expansion process work against atmospheric pressure. Melting heat, heat of vaporization, heat of sublimation is latent heat. Latent heat of a measure often used per .unit of quantity of the substance or substances used in the transformation of each of the Moore is absorbed or released by the heat. 2, sensible heat ratio (SHR) heat load is divided into two parts: the sensible heat and latent heat. Sensible heat .elimination or increase will result in the dry-bulb thermometer temperature changes. Latent heat and humidity of air is increased or decreased. Air conditioning system of total refrigeration capacity to adjust the processing capacity of latent and sensible heat. Sensible heat ratio for display of total .cooling capacity of the refrigerating capacity in proportion. The sensible heat ratio (SHR) = display the chilling / total cooling capacity 3, energy efficiency ratio (EER / COP), air conditioning, critical look at the "energy efficiency". Now air conditioning .market "EER" louder, so what is the "energy-efficiency ratio of air-conditioning? EER is an air-conditioner with a kilowatt of power generation, how many kW of cooling / heat. Divided into refrigeration EER EER and heating energy efficiency .ratio COP. For example, an air-conditioner cooling capacity is 4800W, refrigeration power is 1860W, refrigeration energy efficiency ratio (EER) is: 4800/1860 ≈ 2.6; heating, heating power is 5500W 1800W, heating efficiency ratio COP (auxiliary heating .not open) is: 5500/1800 ≈ 3.1. Obviously, the greater the energy efficiency ratio, the higher the efficiency of air conditioning, air conditioning, the more power. From academic, energy efficiency ratio is a relative value, it with the air .conditioning running specific conditions. Generally, the ambient temperature is higher, the air conditioning energy efficiency ratio lower. However, from a product standard, energy efficiency ratio and is an absolute value. It is understood that, at present, China's market and air conditioning .energy efficiency is lower, on average only 2.6. The Chinese air conditioning 3165 million units last year yield, is the world's total production of over 50%. It is estimated that last year's global sales of air conditioning, energy efficiency ratio lower than about 40 .million 2.8 Taichung has more than 3 000 000 was produced in China. Domestic market sales in the air-conditioning, the average sales 100, only three can reach 3.0 EER. United States the existing air conditioning energy efficiency standards issued in 2000. According to .the standard output power between 4100W, 2300W to 1 horse to 1.5 small horses of air conditioning, energy efficiency ratio 2.8 is qualified products; energy efficiency ratio reached 3.2 is energy star compliant; and energy efficiency ratio lower than 2.8, sales in the United States .market. The European energy-efficiency standards for air conditioning energy efficiency level is divided into A, B, C, D, E, F, g and seven levels. One of the highest level a, energy efficiency ratio is 3. 2 or more .; D-centered, between 2.8 ~ 2.6; e-class the following belongs to low energy-efficient air conditioner. Currently, the vast majority of air conditioners in Europe e-class level. While in Japan's domestic air-conditioner energy-efficiency ratio .now generally 4.0 ~ 5.0. At present, China's domestic air conditioning, electricity consumption had more than 400 billion kWh, even if only the existing air conditioning energy efficiency ratio improved 10% each year at least, it can save 37 billion kWh of electricity, .which is equivalent to a moderate provinces electricity consumption of the urban population as a whole. Improve air conditioning energy efficiency ratio of the task is urgent. Forthcoming air conditioning energy efficiency standards, the air conditioning will be energy efficiency rating is divided into five levels, .level to the highest standards of energy efficiency indicators 3.4, five-level as the minimum standard, energy efficiency indicators 2.6. Wall-mounted air conditioning 1.5 horse as an example, the maximum power consumption per hour and cannot exceed 1.35 kWh, otherwise it will .not be allowed on the market. In such circumstances, the air conditioning industry will face a reshuffle. Briefly summarized as follows: (1) air-conditioner's energy efficiency ratio, is the nominal cooling capacity (heating) and run power ratio, ie the .EER and COP. (2) the EER is air conditioner refrigeration performance coefficient, also called the energy efficiency ratio, said air conditioner unit power refrigeration capacity. (3) the COP is the air conditioner, heating performance coefficient indicates that the air conditioner unit .heating power. (4) the mathematical expression is: EER = cooling capacity / refrigeration power consumption; COP = heating / heating power (5) the higher the EER and COP, the lower the energy consumption of air conditioners, the higher the performance ratio .. 4. air flow and enthalpy difference wind volume means the indoor air, enthalpy difference under indoor evaporator and enthalpy difference. Computer room air conditioning and General comfort air conditioning as one of the biggest features: large air volume small enthalpy difference. In General, .cooler air enthalpy difference, which is returned to the air temperature increase, that is, the lower the air temperature, humidity accuracy demands higher room, return air temperature differential is too large, can cause the temperature and humidity control precision. The air humidity larger .environment, the air temperature to below the dew point of air, wind and fog can send (air condensation) these are adversely affected. Of course, enthalpy difference increases will also help to reduce the system's fan, cooling coil configuration, saving equipment investment and .running costs..