Energy Saving Technology and Effect Analysis of Fluorine Pump Energy Saving Air Conditioning

Energy Saving Technology and Effect Analysis of Integrated Fluorine Pump Energy-saving Air Conditioning Chen Haidong Guo Telecom Jilin Branch, Changchun, Jilin 130033) Fluorine pump air conditioning; Energy saving; Effect The background of the generation and development of fluorine pump energy saving technology is introduced. The energy saving composition and working principle of fluorine pump energy saving air conditioning are introduced. Determine the scientific nature of the test conditions, monitor, analyze and evaluate the accuracy of the test data through the energy test analyzer, and summarize the comprehensive energy-saving effects. At the same time, introduce the main technical problems encountered in the actual work, as well as solutions. Explain the investment prerequisites, conditions and rates of return for the new and retrofitted fluorinated pump air conditioners, and propose the importance of post-evaluation and the necessity of promoting the use in the north. Emphasizing that energy conservation under the premise of safe production is the eternal theme of power professional operation and management.

Foreword With the rapid development of the information industry, communication network energy-saving and emission reduction has become an important indicator to assess the performance of various operating companies under the dual indicators of energy-saving emission reduction and low-cost operations, telecommunications companies operating energy-saving emission reduction is mainly focused on reducing Power energy consumption. In the communications industry, the largest office building consumes electricity is the communications hub building. Generally speaking, the power consumption of main communication equipment in the integrated hub building accounts for about 46% of the total energy consumption, and the power consumption of the computer room air conditioner accounts for about 44%. Communication power equipment Power consumption accounts for about 8%, and other lighting and general load power consumption accounts for about 2%. The most important task for the energy saving and emission reduction of the integrated hub building is to reduce the energy consumption of the main communication equipment and air conditioning, and to save energy in high and low voltage systems and communication power supplies. Can not be ignored. First of all, it is necessary to ensure that all types of communication equipment are in the best energy-saving working state. This requires the rational allocation of the capacity of the communication network equipment system, the improvement of the input power factor of the power equipment, the scientific treatment of the harm of harmonics in the circuit, and the second is the direct and indirect use of natural resources. Cold source to minimize the power consumption of the computer room air conditioner.

Through the continuous promotion and application of energy-saving emission reduction products in recent years, telecom operators have identified the focus and direction of energy conservation and emission reduction work. That is, energy-saving air-conditioning equipment has huge potential for energy conservation and is an important part of energy conservation. With the application of high power density technology, the development of cloud computing and IDC, the computer room air conditioner has already accounted for more than 50% of the total power consumption. At present, there are many mature application technologies for computer room air conditioners, including frequency conversion energy saving, condenser atomization spray, air conditioning chiller water treatment energy saving technology, ethylene glycol energy saving unit, wet film humidification energy saving technology, fluorine pump energy saving technology and group control Energy-saving technologies.

Table 1 Field test data of the fluorine pump operating mode Outdoor temperature: -12 4 Field test data of the magic table 2 fluorine pump operation mode (Outdoor temperature: -16-5 Field test data of the operation mode of the magic table 3 compressor (outdoor temperature) :-12-6 Field Test Data of the Operation Mode of the Compressor 4 (Outdoor Temperature: -16-2) The promotion and application of the energy-saving technology of the fluorine pump air conditioner can not only achieve the energy saving of the air conditioner, but also the efficiency of the fluorine pump operation. The statistics, maintenance is convenient, and the cleanliness of the machine room is kept good.This article focuses on the technical difficulties and energy-saving effects of the product in practical applications.

1 fluorine pump energy-saving air-conditioning composition and energy-saving principle of fluorine pump energy-saving air-conditioning mainly by the reservoir, fluorine pump, pipeline valves and other components, fluorine pump energy-saving air-conditioning is divided into dual-fluorine pump unit and single-system fluorine pump unit, fluorine pump unit must It is used with dedicated or modified air-cooled room air conditioners to form two sets of refrigeration cycle systems, namely compression refrigeration cycle and fluorine pump refrigeration cycle, to form a complete all-weather refrigeration system.

When the outdoor ambient temperature is higher than the indoor ambient temperature, the compressor system operates normally, and the fluorine pump system stops working; when the outdoor ambient temperature is less than 5 feet below the indoor ambient temperature, and the system control set point is reached, the compressor stops working. Fluorine pump start. The refrigerant that has been exchanged with the indoor air in the evaporator directly enters the air-cooled condenser and the outdoor cold source for heat exchange, and the refrigerant that is cooled to liquid state overcomes the tube resistance and returns to the evaporator to continue the heat exchange under the action of the fluorine pump. , thus forming a benign refrigeration cycle.

The fluorine pump energy-saving air-conditioning composition is as shown.

Fluorine pump energy-saving air-conditioning components 2 Fluorine pump energy-saving air-conditioning test and application In order to promote Jilin Province's 2010 energy-saving emission reduction work, a 4-day wall-clocking test was conducted on December 6-10, 2010, and the cooling capacity was 50 kW. Fluorine pump dual-compressor energy-saving products were tested in the field and 2.1 Fluorine pump operation mode was set at a room temperature of 25 ft., and the fluorination pump system switching control temperature was 0 ft (set temperature during normal winter operation). Field test. The test data for the outdoor temperature of -12-4 hr during the test is shown in Table 1. The test data for the outdoor temperature of -16-5 hr during the test is shown in the table to see that the 24h energy consumption is 198.3 kWh. 2.2 The compressor operation mode is set in the equipment room. The temperature was 25 watts, and the Fluorine Pump System switched the control temperature to 25 watts (to start the compressor and set the temperature manually) under field tests. The test data for the outdoor temperature of -12-6 hr during the test is shown in Table 3. The test data for the outdoor temperature of -16-2 hr during the test is shown in Table 4. It can be seen that the 24h energy consumption is 384.9 kWh. 2.3 The test data compares the fluorine pump. Energy consumption during operation of the refrigeration system (48h: 170.7+ energy consumption during operation of the compressor refrigeration system (48h): 383.7+383.5=767.2kWh. Energy efficiency of the fluorine pump refrigeration system operation: (767.2-396.0)/Comprehensive 2.4 Summary a2 The data of the cooling method test must be compared under the same conditions in the room temperature, the lower the outdoor temperature, the higher the energy efficiency ratio of the fluorine pump system, and the more obvious the energy saving.

The power consumption of the fluorine pump refrigeration cycle is only 0.751.5 kW, which is far less than the power consumption of the compressor under the same cooling capacity, which is the main reason for energy saving.

When the fluorine pump refrigeration cycle, the compressor stops working, prolongs the service life of the compressor, and improves the overall service life of the air conditioner.

3 The main technical problems solved in practical applications In 2010, the energy saving reform of the fluorine pump in the provincial hub building was 19 units of dedicated air conditioners. The main problems in the reformed air conditioners were: high compressor noise current, compressor failure, system blockage, and pump flow. Loss, pump lock, compressor short cycle, many times the system dry filter, refrigeration oil and refrigerant replacement, but still frequent failures. Through careful observation and analysis of more than two months, we have found some solutions.

3.1 Avoiding Compressor Failure When the compressor is running, the difference between the condensing pressure and the evaporating pressure is above 8kg/cm2, while the difference between the fluorocarbon pumps is generally around 3kg/cm2. If these two refrigeration cycles share one expansion valve, it is obviously not suitable. . In the fluorine pump cooling mode, the capillary throttling method is used, and the 10mm copper tube is used as a throttling element. There may be more liquid refrigerant in the evaporator. When switching from the fluorine pump cooling mode to the compressor cooling mode, there is a risk that the liquid freon will invade the compressor and cause a liquid strike. Therefore, in the compressor cycle, a gas-liquid separator is added, and its installation position is located between the evaporator outlet and the compressor suction port. This ensures the safe operation of the compressor. This improvement eliminates compressor failure. Compressor short-cycle alarms are event-type alarms that do not affect the normal operation of the machine. They are self-protective actions made by the machine but do not affect system cooling. Without changing the value of the accuracy, the shortest running time of the compressor in the “system setting menu - system configuration delay setting” menu was changed from 180s to 360s. After one month of observation, this problem was solved.

3.2 Compressor and fluorine pump switching technology In practical applications, pump flow loss, pump locking and other faults often occur. The problem often encountered by the fluorine pump is that the current of the shield pump is very small, and the differential pressure before and after the pump cannot be established. After many observations, the pump should have two conditions for normal operation: the first reservoir should contain a certain amount of Freon liquid, the inlet of the pump can not be cut off, and the freon liquid at the second pump inlet should have a certain degree of undercooling.

In order to ensure that there is a Freon liquid in the reservoir before the fluorine pump is operated, the compressor is usually evacuated. The use of compressor vacuum circulation ensures that there is enough Freon liquid in the reservoir, but the Freon liquid temperature is relatively high, the unit will automatically switch to the compressor cooling mode, and the pump lock failure will occur. If the freon liquid in the reservoir is not sufficiently cooled, the air-cooled condenser will start when the fluorine pump is running, and a large part of the liquid refrigerant will be trapped in the condenser, which may cause the fluorine pump to stop flow, causing the pump body Cavitation, and irreversible, pump flow loss failure. Later, after continuous exploration, the original vacuum cycle was adjusted. The outdoor air-cooled condenser fan was changed from the original speed control operation to full-speed operation. After adjustment, the reservoir liquid filled with freon liquid was adequate before the operation of the fluorine pump. Cooling, smoothly into the fluorine pump cycle. Through this approach, the compressor-to-fluorine pump switching problem is well solved.

Since the state and flow of the refrigerant in the two-cycle refrigeration system of the compressor and the fluorine pump are completely inconsistent, when the compressor is cycled, the refrigerant on the compressor side is gaseous, the flow rate is small, the fluorine pump side refrigerant is liquid, and the flow rate is large. It is easy to cause liquid hammering and cavitation when the two systems are switched. Therefore, in order to avoid frequent switching between the compressor and the fluorine pump during the season when the indoor and outdoor temperatures reach the system switching temperature set point, the fluorine pump can be turned off during actual operation. Refrigeration system measures to protect equipment from damage.

4 Fluorine-pump Energy-saving Air-conditioning Effect Analysis Through the resolution of the fluorine-pump air-conditioning technology problems since 2010, from November 2012 to March 2013, 19 fluorine-pumped retrofit air conditioners performed well, which effectively promoted provincial companies' energy-saving and emission-reduction work. The specific data is shown in Table 5.

Through more than three years of running statistics of fluorine-pumped air-conditioning energy-saving air-conditioners, the energy-saving effect of the large-capacity fluorine-pumped air-conditioning has become more apparent. However, we must rationally and scientifically allocate the proportion of fluorine-pumped energy-saving air-conditioning in the entire computer room air-conditioning application. We must determine the new and refitting of the fluorine-pump air-conditioning system according to the size of the heat in the engine room, and blindly renovate or build a new fluorine-pumped energy-saving air-conditioning system. A waste of money. If the refrigerating capacity of the computer room air conditioner does not meet the existing heat load, the fluorine pump refrigerating cycle is not working or the working time is short. For example, the data in the last row in Table 5 is for the IT room, and the working time of the fluorine pump energy saving air conditioner is relatively small. some. Generally, for IT rooms with large IT and data heat loads, it is reasonable to use a single-fluorine-pump energy-saving air-conditioner new-build or retrofit to account for 35% or 50% of the total refrigerating capacity of the engine room. This will give companies a higher return on investment. In addition, it is advisable not to retrofit the fluorine-air pump to the air conditioner that has been in service for the extended period. The cooling effect after the transformation is not satisfactory. The retrofit equipment and the air-conditioner to be taken out of service cause the construction and maintenance managers to face a dilemma.

5 Concluding remarks Through the discussion and analysis of this article, Jilin Province, fluorine pump energy-saving air conditioning table 5 provincial hub building fluorine pump energy-saving air-conditioning energy consumption statistics of the number of equipment fluorine pump start time fluorine pump end running time days number of energy consumption / kWh total energy saving / kWh total electricity savings / Yuanjiali 0kW12012-11-192013-03-22123 11% return on investment, energy-saving effect is obvious, through the indirect use of cold source, eliminating the direct use of all the drawbacks of cold source, does not affect The air quality of the equipment room, low maintenance, high reliability, and stable operation are the two-phase compound refrigeration cycle energy-saving products worthy of being promoted in northern China. Since the power supply industry is the main force for undertaking and implementing energy-saving and emission reduction work, while actively proactively fulfilling the company's energy-saving and emission-reduction targets, it must be kept in mind that the application of energy-saving products must place a premium on whether or not it affects network security and power supply. Reliability, energy-saving effect, simplicity of maintenance, resource cost consumed in the entire life cycle, and other aspects are evaluated objectively and effectively support the promotion and application of energy-saving emission reduction technologies.

For products with insignificant energy savings and ambiguous assessments, it is imperative that they be carefully tested. At the same time, the energy consumption of the equipment is reduced by upgrading the equipment. The energy saving under the premise of safe production is the eternal theme of power professional management.

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