Weak current College】 【commercial building energy-saving strategies of central air conditioner selection --- Power By】 【China power house network.

<br> Commercial building, power consumption statistics air conditioning electricity accounted for 40% or more, so how to choose the correct use of air conditioning equipment, air-conditioning system and do maintenance work, is today an important topic of saving energy. < .br> <br> (A) how to choose a central air conditioning system <br> <br> 1. Please choose the high energy efficiency ratio of air-conditioning cooling EER, host Government Notice minimum standards of the EER value. <br .> <br> 2. choose the higher the EER value host in cold water, the more energy saving chillers, in General, EER values, each improving 0.1 can save 4% chillers using electricity. Chiller of capacity per hour can be removed from the .Interior heat that 1 frozen tons per hour from 3 indoor heat removal, 024kcal (equivalent 12, 000Btu), according to this projection, per square metre room about 0.15 refrigeration tonnes (equivalent to 450kcal / h), selection of air conditioning refrigeration ton capacity .is too large, will make the compressor running long light, or frequent start, power consumption, and derogating from the compressor life. <br> <br> Note: <br> 1. the chiller energy efficiency ratio (EER) kcal / hW .= cooling capacity (kcal / h) divided by the test of cooling consumption required power (W), <br> <br> 2. the coefficient of performance (COP) = cooling capacity (W) / consumption electric power (W) = .1.163EER. 1RT (refrigeration ton) = 3, 024kcal / h. <br> <br> (Ii) how to install a central air conditioning system <br> <br> 1. cold water unit should be placed in the concrete foundation ., plate or base, leverage and bolted and keep the level to cement flat supplement. Cold water host should be left around the appropriate maintenance space, so that future pumping heat exchanger or cleaning copper tube, and other maintenance work. <br> <br .> 2. the pump should be installed gauges and export pipeline to better understand the actual operating conditions. <br> <br> 3. cooling towers around should be well ventilated, must not be blocked, so as not to affect the cooling capacity. .Avoid installing the heat, so as not to affect the cooling towers of cooling effect. <br> <br> 4. small cooler installed, water plate must maintain a certain degree of inclination for condensate drain; air conditioning tank air duct on the air .outlet shall adjust the allocation of appropriate, so as to avoid a regional air flow shortage. Outlet and return air outlet not too close, so as to avoid the short-cycle influence the effect of cold room. <br> <br> 5. .pipe diameter 65mm following 'use of threaded connections, use the above 80mm welded or flange connection. Drain each meter shall maintain 1 cm of tilt. Cold water pipes high point or other the necessary, should be installed with an automatic discharge valve; hoses should .be loaded low point drain valve for system cleaning. <br> <br> 6. air duct in the differences, the differences should be equipment with a view to adjusting air door and lock. Air tube and return air pipe should be thermal insulation, .thermal insulation materials should conform to national standards specifications. <br> <br> (Iii) the operation of the central air-conditioning system <br> <br> 1. air temperature setting range with 26-28 ° c, suitable, and .automatic temperature control equipment should be installed so as to avoid the waste of energy supercooled. For regular access to the rooms, the indoor temperature not lower than the outdoor temperature 5 ° c above, so as not to affect their health. <br> < .br> 2. daily scheduled record cold water temperature of the host (s) are running, oil pressure, temperature, pressure, temperature, refrigerant pressure refrigerant, current and voltage, in order to understand the real situation. <br> <br> .3. without prejudice to refrigeration, moderately improve chilled water outlet temperature, improve the cold water outlet temperature of 1 ° c, about the power consumption can be reduced by 2% water host. <br> <br> 4. should reduce the cooling .water temperature setting, each lower cooling water temperature 1 ° c, could save the power consumption of cold water host 2%. <br> <br> 5. in the first half hour off from work, use cold water and cooling water circulation pump .to continue operating. <br> <br> 6. the night to a small number of units to work overtime, you should partition only the supply of air conditioning, additional space to save energy. <br> <br> 7. cooling system .if they belong to the water separation system, and air conditioners use 2-way valve to control the amount of cold water, the pump can be equipped with inverter and number control systems to conserve energy. <br> <br> 8. underground car .park of exhaust air to an additional controller, in non-vehicular peak times setting hourly running for about 15 minutes to conserve energy. <br> <br> 9. air conditioning use period closed Windows and doors to prevent cold energy leaking or hot air .infiltration, air box back to the Tuyere Department not to pile up incidentals, so as not to affect air quality. <br> <br>.