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Air-conditioning hot and cold water system design and configuration - air conditioning, technology - HVAC Industry by big tree
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Air-conditioning hot and cold water system design and configuration - air conditioning, technology - HVAC Industry by BIG TREE
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| Article Posted: 06/30/2010 |
| Article Views: 21 |
| Articles Written: 1033 - MORE ARTICLES FROM THIS AUTHOR |
| Word Count: 1141 |
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Air-conditioning hot and cold water system design and configuration - air conditioning, technology - HVAC Industry |
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Business,Business News,Business Opportunities
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HC HVAC & R Network With the rapid development of China's steel industry, central air conditioning system in the steel plant has also been more widely used, relative to the split central air conditioning has the following advantages:
central air-conditioning operation and management flexibility, lower operating costs and split air-conditioning, central air conditioning cooling stations can be opened directly control the refrigerator the size of stop time and the cooling capacity can be adjusted according to climate change, to conserve electricity to run .
central air conditioning to ensure the delivery of fresh air to the room, so always keep an empty room with the rapid development of China's steel industry, central air conditioning system in the steel plant has also been more widely used.
Relative to the split central air conditioning air conditioning has the following advantages:
central air-conditioning operation and management flexibility, lower operating costs and split air-conditioning, central air conditioning cooling stations can be opened directly control the refrigerator the size of stop time and the cooling capacity can be adjusted according to climate change, to conserve electricity to run .
central air conditioning to ensure the delivery of fresh air to the room so the room always keep the air fresh, health. But the split air-conditioning is only through the door, window and use
Fresh air ventilator Ventilation and cooling loss great, not only affect the room temperature, but also a waste of energy.
few good repair central air-conditioning fault. Both central air conditioning air conditioning units and the entire air duct system, or a room
Fan Coil Unit And the new air system, both less prone to failure, and refrigeration equipment is located in the cooling station, convenient for maintenance. But the split air conditioner split air conditioner all over everywhere,
Refrigeration compressor Not only the quantity but also spread out the failure to maintain a good hard 11.
split central air-conditioning noise is less than air-conditioning. Central air conditioning can be added all kinds of muffler to reduce noise, and split air-conditioning compressor from the air-conditioned room for more recent, it is difficult to achieve noise reduction measures.
beautiful and diverse forms of central air conditioning at the end may be
Decoration Closely with the construction, piping and equipment can be concealed in the ceiling, the guarantee of the beautiful building, saving the use of interior space; but split air conditioner air-cooled outdoor unit to be fragmented or mounted on a wall hanging out outside the ground, implications decoration effect, including the indoor unit must be wall hung or placed in the ground, but also take up interior space, which virtually reduces the use of room space.
central air conditioning at the end of the air conditioning condensate water discharge can be concentrated, but the split air conditioner layout for distributed, easy to handle condensate discharge.
For these reasons, the steel plant with central air conditioning system is feasible, but the iron and steel plant in the central air conditioning system to the civil construction has the following characteristics: steel factory rather scattered all users of air conditioning, air conditioning users to compare the types of more, the reasonable direction of the design of air conditioning pipeline to address the imbalance in the air conditioning water users to meet the needs of different users are particularly important. complex steel pipe factory, as far as possible the pipeline crisscross the economic compact arrangement is worth exploring, including cooling water pipe insulation outside the project approach is important, it would be improper to directly affect the results. steel factory put into use in all air time to different users, relatively large changes in air conditioning load, due to take full account of the automatic adjustment of units to meet load changes.
Following air-conditioning plant rooms and air conditioning from the two pipelines to discuss the steel plant and air conditioning design, should pay attention to the issues in order for your reference.
1, room side of the design configuration
1.1 Chiller Group selection and configuration
Steel plant central air-conditioning chiller plant selection should take full account of the energy configuration, for most of the steel plant, the steel-making and other processes will generate a lot of steam, from the
Energy Point of view, the choice of air conditioning chillers should consider using this part of the steam as far as possible, so there is excess steam for the steel plant, in the chill preference should be given the choice of the steam-type lithium bromide chillers, cooling capacity for the same steam lithium bromide refrigerating machines and electric refrigeration unit, the unit can be lithium bromide saving about 98%.
Chiller units for the number of options to choose the single unit, under the conditions allow, may choose two or more chillers, that is not considered reserve units, and in the case of load changes, can be turned off part of the cooling unit, saving operating costs, enable higher COP value of units in the run. Chiller and chilled water pumps can be used the way one correspondence, such as limited by room size, it can use multiple chillers and chilled water pumps multiple independent parallel set. This layout has its obvious simplicity? Easy to be used, but this approach should be noted that the part of the cooling load of the case, there is part of the chiller at the closed state, if the management operation and management of the negligence, not the closed road tube chiller
Valve Closed, then there will bypass chilled water diversion phenomenon. Cold water will affect the chiller bypass shunt efficacy and reduce the chiller COP value. On the other hand if the end of the cooling load demand increases, the need for additional chillers Number of units, which requires managers to timely, open and timely way by opening the valve tube chiller, this operation management is clearly more problematic . Solve this contradiction is the most economic measures, additional chiller pipe electric valve. Electric butterfly valve, chiller, cooling water pumps and chilled water pump is designed to run the control chain, so that we can bring the largest energy-consuming air-conditioning system is also energy-saving potential of the region into the most intelligent control, to achieve the most economical investment, The most convenient energy management.
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