Weak current College】 【the air conditioning with cooling technology law questions and answers (1) --- Power By】 【China power house network.

<br> Questions in part a, judgement (picture of growth, the wrong picture H) 1, in the same initial, final State, the irreversible process of change is greater than the amount of reversible processes of change. (X) 2, .reversible process must be permitted static process. (Growth) 3, for the opening of the refrigerants of enthalpy represented as refrigerant flow and the total energy of the transfer. (X) 4, the compressor suction outlet steam quality smaller vent steam quality volume. .(X) 5, wet steam, the greater the dryness x, wet steam from dry saturated vapor line distance. (X) 6, the refrigerant vapor pressure and temperature is a one-to-one relationship between. (X) 7, low .temperature heat source, the lower the temperature, the higher the temperature of the high temperature heat, refrigeration cycle refrigeration, the higher the coefficient. (X) 8, isobaric process variable exponent n = 0. (Growth) 9, adiabatic process in the .system and the outside world without heat exchange processes of variation in entropy Δ S = 0. (Growth) 10, ideal gas, energy and gas temperature, quality is directly proportional to the volume. (X) 11, thermal process, the size of .the work and process regardless of the way, just the initial, final State. (X) 12, gaseous refrigerant condensers condense liquefaction process is fixed temperature constant pressure process. (Growth) 13, the first law of thermodynamics is the essence of the conservation .of energy. (Growth) 14, reversible heat engine efficiency higher than non-reversible heat engine efficiency. (X) 15, although non-equilibrium system is not balanced State, but its status is OK. (X) 16, spontaneous process is .not reversible and non-spontaneous process is reversible. (X) 17, as long as no volume change, external devices may not work. (X) 18, the same latent heat of vaporization of azeotropic with pressure increases and decreases. (Growth) .19, describes the physical state of the system is known as the state parameter. (Growth) 20, system from one State to start experiencing a series of state changes and return to the initial state, the closed thermal cycles known as thermal process. ( .Growth) 21, liquid at any point within the static pressure has nothing to do with the role of surface orientation. (Growth) 22, in order to overcome local resistance and consumption of quality fluid mechanical energy, called along the losses. (X) .23, different diameter, different physical properties of fluids in the critical Reynolds number flow velocity is basically the same ReC. (Growth) 24, works on Reynolds number ReC to identify fluids flowing, Re <2000 to turbulence. (X) 25, .the size of the heat transfer and heat proportional to temperature, and heat resistance inversely. (Growth) of thermal conductivity, heat transfer with 26, convection and radiation heat transfer in three ways. (Growth) 27, the hydrostatic pressure distribution and container shapes .and sizes. (X) 28, unit volume and the quality of the fluid has called the severe fluid. (X) 29, fluid density ρ countdown is fluid quality volume υ. (Growth) 30, fluid flowing in the pipeline. Along the .Canal radial branch into many flow velocity layers, Centre, maximum pipe wall velocity is zero. (Growth) 31, fluid at any point within the direction of the size of the static pressure. (X) 32, fluid flow layer resulting in internal friction .is sticky. (Growth) 33, to the level of outside pressure energy equivalent to liquid internal transfer in all directions. (Growth) 34, table pressure on behalf of a fluid in the actual pressure at the point. (X) 35, table .pressure is absolute pressure and local atmospheric pressure. (X) 36, fluid loss and along the length of the pipe, also known as proportional to the length of the loss. (Growth) 37, hot and cold two fluids in direct contact with a .heat exchanger is called mixed-type heat exchanger. (Growth) 38, R717 refrigerant R12 is a high temperature and low pressure, refrigerant. (X) 39, freon in destroying the atmosphere's ozone layer. (X) 40, mixed refrigerant has azeotropic .solution and non-azeotropic solution. (Growth) 41, freon is chemically stable, not combustion and explosion, no corrosion of metal, insoluble and oil. (X) 42, the Montreal Protocol developed in 2030, deactivate the excessive sexual material HCFCs. .(Growth) 43, binary solution of the constant pressure of vaporization process is the cooling process, but its constant pressure condensation process is the warming process. (X) 44, absorption refrigeration uses refrigerants "on", a boiling point lower substance known as .absorbents, boiling substances known as refrigerants. (X) 45, brine of solidification temperature with its salt quality score increases. (X) 46, refrigeration compressors used in the refrigeration oil cannot be used in place of the universal engine oil. (Growth) ., no. 47, national standard N32 refrigeration oil viscosity grade is equivalent to the old standard 18, refrigeration oil, (growth) is 48, R12, R22 CFC substances belong to the category of substances HCFC, HFC R134a belonging to such substances. ( .Growth) 49, CFC, HCFC substances on atmospheric ozone is due to the damage, and type of material to the HFC ozone is due to the destructive effect. (Growth) 50, market sale of so-called "non-fluoride refrigerator" is .no freon refrigerator as refrigerants. (X) 51, R134a and R12 of thermodynamic properties, in the proximity of the refrigeration appliance used R12, R134a R12 substitution can be used without requiring any changes to the device. (X) 52, specific heat capacity .is a measure of the refrigerant properties, one of the advantages and disadvantages of important indicators. (Growth) 53, LIBR aqueous solution of the higher the temperature, the stronger the absorption capacity of the steam. (X) 54, LIBR aqueous solution of .the higher the temperature, the stronger its corrosive. (Growth) 55, on a steam compression refrigeration cycle, the throttle supercooling refrigerant of before can improve circulation of refrigerating factor. (Growth) 56, on a steam compression refrigeration cycle, and suction superheat .can improve circulation of refrigerating factor. (X) 57, in steam compression refrigeration system, you can use recuperator to improve its efficiency. (X) 58, condenser, evaporator temperature increases, its spread, the more caloriesSo, the refrigerating factor. ( .X) 59, vapour compression refrigeration cycle, when evaporation temperature does not change, the condensation temperature, cooling capacity will decrease power consumption will increase, is reducing refrigeration factor. (Growth) 60, steam compression refrigeration cycle, when the condensation temperature, evaporation .temperature decreases, the cooling capacity will decrease power consumption will increase, reducing refrigeration factor. (X) 61, vapour compression refrigeration system, the compressor suction superheat with certain refrigerant vapour, prevents the occurrence of wet compressed. (Growth) 62, in the .use of freon refrigerant in the refrigeration system, be sure to install the dryer, (growth) 63, in the use of ammonia as a refrigerant in the refrigeration system, make sure you do not have to be drier, (growth) 64, just .know that the temperature of evaporation, condensation temperature, can be used in the refrigeration pressure enthalpy diagram on steam compression refrigeration cycle theory (saturated). (Growth) 65, because ammonia and water miscible, therefore there is no need to control ammonia water content .. (X) 66, absorption chiller of refrigerants is boiling point different substance refrigerants pairs, where the low-boiling material for refrigerant, high boiling point of the absorbent. (Growth) 67, LIBR absorption chiller is LIBR in refrigerant. (X) .68, LIBR absorption chiller of evaporating temperature must be higher than 0oC. (Growth) 69, LIBR absorption chiller with vapor compression refrigerator (water-cooled) cooling capacity is the same, they are basically the same volume of cold water. (X) .70, refrigerant liquid cooling is designed to reduce the production of Flash units for gas and thereby increase the cooling capacity. (Growth) 71, single-stage ammonia absorption refrigeration system solution pump is the refrigerant vapor. (X) 72, absorption refrigeration, .absorbent by absorption refrigerant solution, second solution to mix. (X) 73, LIBR absorption chiller in generator heating LIBR aqueous solution, the solution of water heated to boiling only 100 oC becomes a gas. (X) 74, semiconductor refrigeration efficiency low, .refrigeration temperature for less than 0 oC following temperature. (X) 75, evaporator is the refrigerant saturation. (Growth) 76, compressed refrigerant requirements "dry compression", is a must in the dryness line x = 1 and compressed. (X) .77, air moisture content is the content of water in the air. (X) 78, dry air in nature, does not exist, the air is humid air. (Growth) 79, at a certain temperature, the amount of water vapor in .the air in the House only has a maximum value. (Growth) of 80, the lower the relative humidity of φ, indicating the extent of the moist air drying. (X) the greater the 81, relative humidity, the air φ moisture absorption .capacity. (X) 82, absolute humidity ρ v describes the air contained in the actual amount of water vapor in the air conditioning works in greater use of ρ v this parameter. (X) 83, relative humidity reflect the humid air deviation from saturation .level and size of hygroscopic capacity. (Growth) 84, dew point temperature is of moist air becomes saturated when temperature, air start dew temperature. (Growth) 85, moisture content of water vapour partial pressure d and Pv is both independent of humid air .thermal parameters. (X) 86, saturated air dry-bulb temperature, wet-bulb temperature and dew point temperature are equal. (Growth) 87, wet air enthalpy includes sensible heat and latent heat. (Growth) 88, when the temperature t .rise, wet air enthalpy h must increase. (X) 89, in air handling process to transfer heat to the air terminal State and the initial state of enthalpy difference. (Growth) 90, when t rise, wet air enthalpy h increase, or .decrease depending on how the d. (Growth) 91, moisture content d and B the atmospheric pressure must be set according to the different B values to choose different psychrometric chart. (Growth) 92, dew point temperature is wait enthalpy line and saturation line .intersection corresponds to the temperature. (X) 93, wet-bulb temperature and dew point temperature of trajectory is φ = 100% saturation line. (Growth) 94, initial state and the final State has different air state change process, as long as .the ratio of heat and moisture are the same, change the direction the process is different. (Growth) 95, mixed status point C of the blend State of the connection before the two split into two segments of length, and participate in two gas mixture .is proportional. (X) 96, low efficiency filters can filter out the air 1 ~ 10 μ m. (X) 97, air dew-point temperature with the relative humidity increases, relative humidity, dew point temperature is lowered. (X) .98, refrigeration compressor lubrication is relying on the pump's work. (X) 99, small hermetic reciprocating compressors and rotary compressor shell internal belongs to the area of low pressure. (X) 100, reciprocating compressor belonging to volume compressors. (Growth) 101 ., a spiral-screw compressors is constituted of yin and Yang rotor. (X) 102, screw compressor with simple structure, Screw Machining accuracy requirements are not high. (X) 103, centrifugal compressor does not belong to the volume of compressors. ( .Growth) 104, screw compressors, centrifugal compressor can realize stepless energy regulation. (∨).