溴化锂冷水机组（Lithium bromide chiller）

溴化锂冷水机组（Lithium bromide chiller） 溴化锂冷水机组(Lithium bromide chiller) The lithium bromide absorption refrigeration machine is using LiBr solution as absorbent and water as refrigerant, the use of water under high vacuum evaporation and heat absorption refrigeration is realized. For the refrigeration process can continuously carry on, after the evaporation of refrigerant water vapor absorbed by the LiBr solution, dilute solution, this process occurs in the absorber, and the heat energy, heating the solution to water is separated, and the solution concentration, this process is carried out in the generator in. The steam generator in the condenser condenses into water, evaporated after throttling sent to the evaporator. So the cycle to achieve the purpose of continuous cooling. The lithium bromide absorption type refrigerating machine is mainly composed of an absorber, generator, condenser and evaporator of four parts. The From the dilute solution of lithium bromide absorption, a solution pump (i.e. generator pump), boost the solution heat exchanger, the heating temperature is high temperature concentrated solution generator increased after entering generator. By the heat transfer tube of heating steam heating in the generator, the solution temperature increased until the boiling water in the solution gradually evaporated, and the solution concentration increasing. Single effect LiBr absorption chiller heat steam pressure is generally 0.098MPa (gauge). The water vapor evaporated refrigerant in the generator upwards through the liquid baffle into the condenser, liquid baffle vapor liquid separation, to prevent the droplets with the steam enters the condenser condenser. The condenser tube into the cooling water pipe, so water vapor refrigerant cooled by cooling water is condensed into water, the refrigerant water. Accumulate in the water at the lower part of the throttling refrigerant flowing into the evaporator condenser, because the condenser pressure is higher than the pressure in the evaporator. Such as: when the temperature is 45 degrees centigrade, the condensing pressure is 9580Pa (71.9mmHg); the evaporation temperature is 5 degrees centigrade, the evaporation pressure 872Pa (6.45mmHg). U tube is the liquid sealing effect, prevent steam in the condenser directly into the evaporator. The Refrigerant into the evaporator, due to pressure drop first flash out part of refrigerant vapor. Because the evaporator is a spray type heat exchanger, the spraying quantity is many times larger than evaporation, so the majority of cooling water is gathered in the water tray of the evaporator, and the refrigerant spray pump boost after entering the evaporator tube, through the nozzle to spray on the outer surface of the tube bundles, soaked in a chilled water pipe flow in the heat of evaporation, water vapor pressure of the refrigerant into. Because the evaporator pressure is low, so it can get low temperature chilled water required in the production process or air conditioning system, to achieve the purpose of refrigeration. For example, the evaporator pressure is 872Pa, the evaporation temperature of cooling water is 5 DEG C, cooling water at 7 DEG C can be obtained. The refrigerant vapor evaporation from the liquid baffle will drop the separation of its inclusion into the absorber by uniform spray absorber pump sent and absorbed in the absorption solution middle tube cluster appearance, to dilute solution. The solution is obtained by solution mixing between concentrated solution and absorber liquid bag from the solution heat exchanger heat after cooling in dilute. In order to ensure the absorption process continued, the absorption process of the heat released by the cooling water heat transfer tube in time away. Intermediate solution to absorb a certain amount of water vapor into dilute solution, gathered at the bottom of the absorber liquid in the bag, and then sent to the pump by the generator generator, so the cycle. The The cycle of the process, absorption chiller and compression refrigerating machine is the same in principle obtain cooling capacity, is the use of high-pressure liquid refrigerant through the throttle valve (or U tube) after throttling, under low pressure evaporation to produce refrigeration, condensation, evaporation and throttling device they have has the same effect. The main difference is that by low pressure refrigerant vapor into how the method of high-pressure steam with different compression refrigerating machine is realized by the prime mover driven compressor, and absorption refrigeration machine through the absorber, a solution pump and generator and other equipment to achieve. The dilute solution from the absorber temperature is lower, and the lower the temperature in dilute solution, You need more heat in the generator. Since the high temperature concentrated solution of the generator, and the concentrated solution of higher temperature in the absorber requires more cooling water. Therefore, setting solution exchanger, dilute solution by concentrated solution heating temperature high temperature low, thus reducing the heating load, reducing the cooling load of the absorber, can shoot two hawks with one arrow. The The lithium bromide absorption refrigeration machine in addition to the cooling water and lithium bromide solution two internal circulation, there are three systems with external connected, this is: The heat source system; The cooling water system; The chilled water system. The Heating steam (or hot water) into the generator, flowing in the tube, the heating tube outer solution to boiling and evaporation of refrigerant steam, heat and steam after the release of latent heat of vaporization condensation water discharge. In general, the condensation water recycling and use them back to the boiler. The In the absorber solution absorption low pressure refrigerant vapor from the evaporator, is an exothermic process. In order to make the absorption process to proceed continuously, need to be cooled. Also need cooling water in the condenser, the high-pressure refrigerant steam from the generator to the refrigerant into water. The cooling water flows through the absorber, and then through the condenser, the cooling water temperature of condenser is generally high, pass into the cooling tower, cooling and then recycled into the absorber. The Chilled water pipe bundle from the user into the evaporator, due to evaporation heat pipe outside the cooling water, cooling the refrigerant water. Refrigerator are working to get the low temperature (7 DEG C) of the cooling water, chilled water cooling capacity is “ the media ”. The 1 tons of cold =3024 watts 1 kW =860 kcal The United States 1 tons of cold =3024 kcal / h (kcal/h) =3.517 kW (KW) Japan 1 tons of cold =3320 kcal / h (kcal/h) =3.861 kW (KW) (Note: 1 tons of cold is 1 tons 0 DEG water in 24 small changes within the refrigeration quantity. To 0 degrees ice) The conversion of common unit of refrigeration technology: 1 horsepower (or 1 horse power) =735.5 w (W) =0.7355 kW (KW) 1 thousand cards per hour (kcal/h) =1.163 watts (W) The United States 1 tons of cold =3024 kcal / h (kcal/h) =3.517 kW (KW) Japan 1 tons of cold =3320 kcal / h (kcal/h) =3.861 kW (KW) Celsius temperature (F = F-32) 5/9 (Note: 1 tons of cold is 1 tons 0 DEG water in 24 small changes within the refrigeration quantity. To 0 degrees ice)