Energy-saving HVAC central air conditioning discuss the problem – heat pump, air
1, add Designers, speed up the implementation of equipment Project Architects Registration System
HVAC Air-conditioning projects, should be more detailed cooling and heating load calculations and those taken Energy Measures currently taken by many designers are those energy-saving measures, many designers are now using budget targets to increase again, so cold, the heat source host long-term low load, low efficiency of the next?
2, Air Conditioning Room? Ahref = "http://designer.ccd.com.cn/" title = "" target = "_blank"> design temperature do?
By Chongqing, Shanghai, Guangzhou and other areas has proved that the summer indoor temperature? or winter? , except HVAC investment increased by 6% to 8% in big things, increase the temperature difference is not consistent with hygiene requirements. Comfort air conditioning in summer is the ideal indoor temperature than the outdoor temperature? -8 better?
3, cold and heat sources Central air conditioning energy consumption generally consists of three components, namely?) Cold and heat source; (2) Air conditioning unit terminal equipment;?) Water or air transportation system. Energy consumption in the three-part, cold and heat source energy consumption accounts for about half of total energy consumption is an important part of energy-saving air-conditioning. If you are the respective consumption of energy converted into a Energy , Various kinds of units are available primary energy consumption per unit time of energy taken by the system to compare cold or heat, this article uses a primary energy efficiency OEER (W / W) to represent?
Units from the perspective of the summer cooling energy consumption: centrifugal and screw chillers OEER the highest, two steam effect LiBr absorption chillers OEER minimum; winter heating: screw, piston Heat Pump Chiller OEER highest, lowest electric hot water unit, that the maximum power consumption?
4, air conditioning units and terminal equipment
97 years of statistics, domestic production has more than 200 fan coil manufacturers, the annual output? 0-80 million; air conditioning units also? 00 I have, the output of 5 million or so?
4.1 air-conditioning unit Fan flow unit should be selected, matching a reasonable pressure, less air leakage, the air transportation system a few big units?
4.2 FCU View from the overall level of
fan coil with less than similar foreign products, but compared with foreign advanced level, the main difference is power consumption, weight and noise aspects of coil?
5, air-conditioning water system General air conditioning system transmission and distribution of electricity, heating during the winter about the whole? Ahref = "http://www.ccd.com.cn" title = "" target = "_blank"> Building momentum electricity? 0-25%; about 12-24% in summer cooling period, thus saving the water system is important?
) Choice of water Pump Design value is based on the sample plate to find water pump parameter determination, rather than pump water pump characteristic curve of the selected model?
) At the end of each water loop for water balance calculation, the pressure differences between each end of the loop also take effective measures, so the hydraulic, thermal imbalance is serious;
) High-volume, small temperature difference is widespread Design for, and generally the backwater temperature 5 , but by the measurement, return water temperature difference of chilled water in summer is better for 3 , less only? -1.5 , causing the actual flow Design of water? .5 Times, so that greatly increased pump power consumption?
5.1 designers should pay attention to the water system design, and actively promote the Variable Speed Pump, winter, summer and dual-use two-speed pumps and other energy saving measures?
5.2 cooling? Refrigeration system cooling water inlet temperature of the high and low power consumption has an important impact on the host, usually calculated in the water under certain conditions, high water temperature 1 , the main mechanical and electrical power consumption of compression increase of about 2% of lithium bromide chiller can High consumption of 6%?
Current cooling tower made primarily in the following questions?
) Cooling efficiency is low, product samples fail under cold increases?
) Leaching serious, not only pollute the environment, and waste of water?
) Noise, loud noise affect the surrounding living environment?
5.3 to reduce the water side of the dirt, corrosion and moss video?
Water side of the scale, corrosion and moss great influence on the cooling system is an important reason for high energy consumption air conditioning?
) Scale thermal resistance significantly affect the properties on the refrigerator, especially for lithium bromide absorption chillers greater impact:
) General chiller rated cooling capacity is based on = 0.15mm.Rf = 0.000086m2.K / W calibration, the factory of the new units because heat exchange generally been passivated, the new machine scale heat pump group Rf ?, approximately = 0.075mm, Rf = 0.000043m2.K / W. Therefore, the cooling capacity of the factory of the new units should be large than the rating of lithium bromide units should be?% Of the compression chiller is about 3.6% should be large. So use the new units, not only to achieve the rating, and should be greater than the rating. Factory LiBr units larger than the rated cooling capacity of 7%, electricity not been made compression unit standard requirements?
Proved at home and abroad, high-frequency magnetic field can be a good multi-stage processing of water quality, therefore, should promote multi-use high-frequency electromagnetic water treatment device, currently used by some units plus full soft water treatment or medicine is undesirable?
6, strengthen the management of central air conditioning
6.1 to enhance the training of air operators, improve the management quality of personnel, operation of air operators certificate system?
6.2 central air conditioning system to independent power (energy) accounting system?
Overcome electricity? Pot?, Be a waste of electricity (energy) penalty, save power (energy) award system?
Addition to the above points, should be based on specific project circumstances. Actively promote the water loop heat pump, with heat recovery, variable air volume, variable volume systems, energy-saving technology?
Baoliao Hotline :020-22374965 Submission E-mail : hellomily@qq.com Edited by: sub-Yin
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