When the device is restarted, a large amount of air accumulates in the radiator. Opening the exhaust gas can discharge these gases as soon as possible, ensuring that the radiator can be well heated during initial operation to avoid large thermal temperatures. stress causing radiator leak. Normal exhaust involves exhausting non-condensable gas from the steam side of the heater to ensure efficient heat exchange.
The main function of the deaerator is to remove oxygen and other non-condensable gases from the boiler feed water to ensure the quality of the feed water. If oxygen is dissolved in water, the metal in contact with the water will be corroded. At the same time, if there is gas accumulation in the heat exchanger, the thermal resistance of heat transfer will increase and the heat transfer effect of the equipment will increase. reduce. Therefore,any gas dissolved in water is unfavorable, particularly oxygen, which will directly threaten the safe operation of the equipment. Thermal deaeration is used in thermal power plants. The deaerator itself is a hybrid heater in the water regeneration system. At the same time, the high pressure heater is used for dehydration, chemical water replenishment and high pressure dehydration and exhaust with qualified equipment. water quality throughout the plant. It can be fed into the degasser to be used to reduce the loss of steam and water in the power plant. 1. The working principle of headless degasser: After the main condensate (including supplementary water) of the low pressure heater is adjusted by the water inlet regulating valve, it enters the degasser, mixes with other degassers in the degasser and passes through the nozzle or tube poreux ejects to form an umbrella-shaped water film, which performs mixed heat and mass transfer with the heating steam from bottom to top. The feed water quickly reaches saturation temperature under operating pressure. At present, most of the dissolved oxygen and other gases in water are basically analyzed, thereby achieving the goal of removing oxygen.
What is the difference between an air source heat pump and a water heat pump?
The main work of water conversion is to treat raw water (river water or tap water, etc.) through equipment such as shade beds and deckchairs, impurities, metal ions, suspended matter, etc. present in the water are removed and the treated deionized water is sent to boilers or desuperheaters and other equipment for use;
Another task of chemical waterue is monitoring water quality, and boiler overheating. Steam, saturated steam, water in the drum, etc. are regularly sampled and tested. If not qualified, the boiler must be treated with chemicals;
Sometimes the water chemistry station assumes part of the laboratory functions and tests the main auxiliary materials of the plant electrical, such as lime testing for desulfurization, raw coal quality testing (calorific value, ash content, humidity, volatile matter, etc.). sulfur content, etc.);
If the power plant has a sewage treatment plant, it should also undertake the task of sewage treatment. If you want to know more about sewage sedimentation, CASS regulating tank aeration, decanter, sludge removal with filter, etc.
This difference is relatively largeof. Air source heat pumps are used for hot water, while water source heat pumps are used for hot water. They can be used as air conditioner, refrigeration. , and heat exchanger, and it can also do heat recovery, heat water, and then use it for bathing or floor heating. However, it is still recommended that if used exclusively for hot water, it is best to use an air source. If it is used for multiple purposes, it is best to use a water heat pump. Hope this helps you.
The working principle of geothermal (water) heat pump unit is to use water and underground energy (groundwater, soil or water surface) to exchange heat and cold as a source of cold and heat. of the water heat pump. In winter, "Take" heat from the earth's energy for indoor heatingFurthermore, the ground can be used as a “heat source”; in summer, when indoor heat is extracted and released to groundwater, soil or surface water, the soil can be used as a "heat source". source". It has the advantages of high efficiency, energy saving, economic and environmental protection, safe and reliable, and can operate automatically. What are the advantages of geothermal heat pumps versus air source heat pumps? Compared to air source heat pumps, geothermal heat pumps have many advantages: (1) Low temperature fluctuations throughout the year Temperature. is higher than that of air in winter and lower than that of air in summer. Therefore, the heating and cooling coefficients of geothermal heat pumps are higher than those of air source heat pumps, generally higher than that of air source heat pumps. 40%, which allowsto save energy. and costs. About 40%. (2) No defrosting is required for winter operation, reducing losses due to freezing and defrosting. (3) Earth source has better energy storage effect. Classification of geothermal heat pump systems and their respective advantages and disadvantages
Points 1) Groundwater heat pumps, GWHP groundwater heat pump systems, commonly known as source heat pump systems recharge water from deep wells. By constructing a group of pumping wells, groundwater is pumped and sent to the water heat pump unit via secondary heat exchange or directly. Once the heat is extracted or released, the groundwater is returned to the ground. through the group of recharge wells. Its biggest advantage is that it is very economical and occupies a small area, but it should be noted that it must meet the conditions suivantes: good water quality; abundant water quantity and compliance with standards; 2) (a) Horizontal ground-coupled heat pump
Horizontal buried pipe geothermal heat pump system (b) Vertical buried pipe geothermal heat pump system with ground-coupled heat pump vertical drilling. Both methods (a) and (b) belong to GCHP ground-coupled heat pumps (underground coupled heat pump systems), also known as buried pipe ground source heat pump systems. There is another term called Underground Heat Exchanger Geothermal Heat Pump System. This closed system method uses an intermediate medium (usually water or water with added antifreeze) as a heat carrier, allowing the intermediate medium to circulate in a closed loop buried inside the ground, thus allowing achieve the objective of heat exchange with the groundstay. For the vertical buried pipeline system, the advantages are: smaller land occupation, less electricity consumption for pipelines and water pumps.
The disadvantage is higher drilling costs students. For the horizontal buried pipeline system, the advantages are: The installation cost is lower than that of the vertical buried pipeline system, it is widely used, and it is easy for users to master. Its disadvantages are: large floor space, significant impact on floor temperature
and high energy consumption. water pumps. 3) Surface water heat pumps, SWHP surface water heat pump system. By direct extraction or indirect heat exchange, river water, river water, lake water, reservoir water and sea water are used as cold water and hot water heat pump. source. Belongs to the pom methodpe water heat. Its advantages are: it can provide direct refrigeration to 10°C in lakes 10 meters or more deep, requiring less investment than underground pipeline systems, lower energy consumption for water pumps , high reliability and low maintenance requirements, low operating costs in hot areas. lake water can be used as a heat source. Its disadvantages are as follows: In shallow lakes, the coils are easily damaged. Due to significant changes in water temperature, the efficiency of the unit will be reduced. 4) Standing column heat pumps, SCW single-well heat exchanger, which is a single-tube vertical buried tube geothermal heat pump, are often called "hot wells" abroad.
In this method, a steel sleeve is used as a sheath above the level of thewater table, and the diameter is consistent with the diameter of the hole; below the water table level are natural holes without any cementing facilities. The water from the heat pump directly enters the upper part of the hole, part of which penetrates into the surrounding rock and soil below the water table level for heat exchange, and the remaining part exchanges heat with rock and soil at the side wall. The heat transfer fluid is extracted from the bottom of the hole through a return pipe buried to the bottom which serves as a water supply to the heat pump unit. This method is mainly used in rock formations. The typical hole diameter is 150mm and the hole depth is 450m. This system is suitable for rocky geological areas where rock drilling costs are high. Direct heat exchange with rock significantly improves heat exchange efficiencymic and reduces the costs of drilling and buried pipelines. It is necessary to pay attention to the analysis of specific geological conditions and carry out specific works such as insulation, waterproofing, filtration and heat transfer calculation itself. 5) Hybrid geothermal heat pump system that combines boiler/cooling tower with buried pipes underground: it is suitable for buildings with small spaces that cannot use heat exchange systems with pipes buried alone or in partitions internal and external where there is a large amount of energy available in winter. Using heat-exhausting buildings, cooling towers and closed-loop systems,
combine cooling to reduce costs; the system proved to be very effective and inexpensive. Its additional heat sources include water and ground, solar energy, heatelectric audiers, urban heat networks..., and the additional heat rejection is resolved by cooling towers or water and soil.
System design requires detailed calculation of heat dissipation and heat rejection in each season as well as total neutralized heat dissipation or heat rejection to select the heat source and heat tower. cooling. The difference between geothermal heat pumps and water source heat pumps: Water source heat pumps and geothermal heat pumps
Both are defined from the selection of local heat sources. Water heat pumps generally refer to local heat sources. derived from surface water, groundwater and seawater, geothermal wastewater heat pumps are sometimes called geothermal heat pumps, but groundwater as a source of heat fromLow level heat pumps may also be called geothermal heat pumps. Additionally, water ring heat pumps can also be called water heat pumps. The definition angle is different and the name is also different. A system that uses a cooling tower for heat dissipation cannot be called a water heat pump. If it is directly buried underground, if a well is dug, the water from the well should be used as a water heat pump, otherwise it will be a heat pump. geothermal heat pump. The difference between the names of geothermal heat pumps and geothermal heat pumps: The names of geothermal heat pumps and geothermal heat pumps were indeed confusing in the past. The relevant specifications for geothermal heat pumps have been published, which has clarified things. scope of names.Clear explanation: Geothermal heat pumps makereferring to all heat pumps that use the earth as a source of cold and heat. They are all called geothermal heat pumps, including ground heat pumps (i.e. ground-coupled heat pumps), groundwater heat pumps, and surface heat pumps. water heat pumps.
Heat pumps (including rivers and lakes) Sea water), etc., this is said to distinguish water ring heat pumps. Water heat pump is a general term, including all heat pumps that use water as a source of cold and heat, and of course also includes floor heat pumps and ring heat pumps. water. This is to distinguish between air-source (air-cooled) heat pumps. heat pumps). So, in terms of general classification, water heat pumps include geothermal heat pumps and water ring heat pumps, as well as somespecial heat pumps that use low-level hot water energy (such as using industrial wastewater or cascading cooling systems). circulating water in power plants). In short, to put it simply, geothermal heat pumps generally refer to geothermal heat pumps, surface water, groundwater, seawater and wastewater heat pumps. But now people are used to calling heat pumps geothermal, and surface water, groundwater, sea water and wastewater heat pumps are called water source heat pumps.