CN101957041A

CN101957041A - Safe and energy-saving operation method for central air conditioner

Info

Publication number: CN101957041A
Application number: CN 201010259276
Authority: CN
Inventors: 张铭联; 蒋涛; 权立杰
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-08-23
Filing date: 2010-08-23
Publication date: 2011-01-26

Abstract

The invention discloses a safe and energy-saving operation method for a central air conditioner, which is applicable for all the property management operation use related to central air conditioner refrigerating units in high-rise office buildings, large-scale public parks, marketplaces, public houses, hospitals and the like. The method has the advantages of improving the running safety of equipment, reducing the probabilities of damage of the equipment and injury of operators, prolonging the service life of the equipment, saving power (energy-saving rate of 20 to 30 percent), protecting environment, reducing noise, reducing the water leakage of air-conditioning pipes and decreasing the impact on a power supply network, along with having an obvious economic benefit.

Description

Central air-conditioning energy-saving safe maneuver

Technical field the present invention relates to a kind of central air-conditioning energy-saving safe maneuver, is applicable to that the estate management of high-rise office building, large-scale public good garden, market, hotel central air-conditioning refrigeration unit is manipulated.

Background technology the object of the present invention is to provide a kind of power consumption central air-conditioning maneuver that can overcome existing deficiency.Show that according to present national statistics because building classification and area is different, the power consumption of central air conditioner system accounts for the 18%-35% of total electricity consumption, the power consumption of unit construction area is about 35W/m ²-65W/m ²., about 35% is invalid power consumption in the electricity consumption of central air-conditioning, has wasted valuable power resource, and China's central air-conditioning industry growth rate is up to 20% over nearly 10 years, and therefore, the central air-conditioning energy problem is extremely urgent.

At the central air-conditioning design aspect of skyscraper, the refrigerating capacity of central air-conditioning is greater than the requirement of reality usually.The design temperature of evaporimeter cold water is generally 7 ℃-12 ℃, in the actual motion, will increase load behind the host-initiated gradually until 100% load operation, and when treating that cold water temperature is reduced to 7 ℃ of design temperatures, main frame is out of service; When treating that cold water temperature goes back up to 12 ℃ of design temperatures, the host-initiated operation.So move in circles, every day 10-20 time, at main frame run duration each time, cooling tower will be a cooling water temperature most possibly, heat-sinking capability deficiency often, condenser will experience the time period of a high temperature, high pressure, at this moment compressor firmly increases and increases along with condenser pressure, thereby cause compressing the significantly increase of the power consumption of motor, look the situation difference of cooling system, usually compress the 20%-40% of the power load meeting overflow constant load of motor, this part electricity consumption is invalid power consumption.Particularly in case through final acceptance of construction but originally can not find the central air conditioner system of significant deficiency on one's body again from design specification and equipment, this is the person of manipulating of the central air-conditioning aspect that haves much room for improvement and deepen the understanding just.

Summary of the invention main points of the present invention are to select the angle from law of conservation of energy to design.We wish that the refrigerating capacity of central air-conditioning equals the caloric value at user scene, this is optimal refrigerating capacity, refrigerating capacity hereto, be difficult to obtain with theoretical Calculation Method, can only estimate, this amount does not need to calculate for the operating personnel of estate management, just as cooking a course, the cook do not need to measure fiery temperature, only need to be grasped the duration and degree of heating just with heat, by changing the former parameter that is provided with, find one group of, the central air-conditioning that is suitable for this building most load percentage the most reasonable, temperature, valve opening etc.-series data is set.Make central air conditioner main machine even running under the pattern of energy-saving safe, obtain the social benefit of safety, energy-saving and environmental protection.

1), the security that improved equipment the present invention has the following advantages:.The central air conditioner main machine higher-pressure region is owing to take underrun, and pressure and temperature is tended to be steady, and reduced the probability that device damage and operating personnel are hurt.2), prolong service life of equipment.The electric current of motor increases along with firmly increasing of compressor, therefore the temperature rise of motor also can correspondingly increase, take underrun also reduced simultaneously motor temperature rise, alleviated compressor firmly and wearing and tearing, reach the purpose that prolongs service life of equipment.3), saves energy.Avoid the oepration at full load of equipment, improve the operation ratio of equipment, reduce the invalid power consumption of main frame, also alleviated the invalid power consumption of auxiliary equipment such as cooling water pump, cooling tower, thereby made the power saving rate of central air-conditioning reach 20%-30%.Remarkable in economical benefits.4), environmental protection reduces noise.After the even running of central air conditioner group, the noise of main frame and cooling tower will obviously reduce, and environmental protection is benefited.5), reduce the accident that air-conditioning duct is metalled run out.Metallic conduit all has the characteristics of expanding with heat and contract with cold, and frequent flexiblely can cause phenomenons such as pipeline breaking, interface fracture as ' breathing ', and causes the accident of metalling run out.6), alleviate impact to supply network.The frequent start-stop of big load consumer is sizable to the impact of supply network, particularly can cause the transformer temperature rise, influences the service life of insulating barrier.

Specific embodiment central air-conditioning energy-saving safe of the present invention maneuver, its specific embodiment:

1, under the enough situations of the refrigerating capacity of central air conditioner main machine, the energy valve opening that compressor is set is 60%-80%, and centrifugal compressor makes the compressor underrun more than or equal to 40%, reaches the effect of economize on electricity noise reduction;

2, the evaporimeter cold water temperature is set to 10 ℃-15 ℃, prolongs the main frame available machine time;

3, by adjusting above data, observe the main frame start-stop time, average 2-4 time/day; Increase the running time of main frame, reduce the intermittent time, realize the even running of main frame underload, cool circulation water is constant on a temperature value; Minimizings such as main process equipment, fan coil, pipeline valve are because of stretching that variations in temperature causes;

4, adjust the aperture of cooling water pump valve, reduce the electric current of cooling water pump motor, the time according to variations in temperature control cooling tower fan, reduce and use electrical loss; Use frequency converter timing, suitably reduce rotating speed; Reduce cooling tower current and wind speed, can reduce noise 5%-10%db simultaneously;

5, adjustment performs record repeatedly, adds up the optimum data of man-machine combination, but save electricity 20%-30%.

Claims

1. the present invention relates to a kind of central air-conditioning energy-saving safe maneuver, it is characterized in that having the following scope of application: high-rise office building, large-scale public good garden, market, hotel, hospital, all relate to the estate management operation of central air-conditioning refrigeration unit.

2. the described central air-conditioning energy-saving safe of claim 1 maneuver is characterized in that having following step:

1), under the enough situations of the refrigerating capacity of central air conditioner main machine, the energy valve opening that compressor is set is 60%-80%, centrifugal compressor makes the compressor underrun more than or equal to 40%, reach the economize on electricity noise reduction effect;

2), the evaporimeter cold water temperature is set to 10 ℃-15 ℃, the prolongation main frame available machine time;

3), by adjusting above data, observation main frame start-stop time, average 2-4 time/day; Increase the running time of main frame, reduce the intermittent time, realize the even running of main frame underload, cool circulation water is constant on a temperature value; Minimizings such as main process equipment, fan coil, pipeline valve are because of stretching that variations in temperature causes;

4), adjust the aperture of cooling water pump valve, reduce the electric current of cooling water pump motor, the time according to variations in temperature control cooling tower fan, reduce and use electrical loss; Use frequency converter timing, suitably reduce rotating speed; Reduce cooling tower current and wind speed, reduce noise 5%-10%db simultaneously;

5) adjust, repeatedly and perform record, add up the optimum data of man-machine combination, but save electricity 20%-30%.