制冷机房暖通设计+CAD图纸(3)
The design involves a process for the industrial buildings of air conditioning, so the indoor heat and moisture load requirements for accurate calculations. For air conditioning units, compressed air pipes, water pipes and other design process selection and arrangement provides full and accurate basis. Cold storage using ceiling send cold evaporator cooling mode, using electric defrost, defrost pans and drain electric heating insulation. For cold temperature control, a layer set 2 ~ 8 ℃and -30 ℃cold storage; triple set 2 ~ 8 ℃ and -20 ℃cold storage. And the 3rd plant lyophilizer, in order to ensure safety in production, requires constant cooling; the 3rd part of the air conditioning plant and the 5th plants need 24 hours cooling. The 3rd lyophilizer cooled screw chillers use a separate one, when the chilled water supply and return water temperature 7/12 ℃, cooling water supply and return water temperature 32/37 ℃, the unit's cooling capacity of 580KW. The 3rd lyophilizer outside air and process water cooled centrifugal chiller system uses two sets, when the chilled water supply and return water temperature 7/12 ℃, cooling water supply and return water temperature 32/37 ℃, the unit's cooling capacity of 1934KW.
Besides, the paper also focuses on the choice of the system piping, welding, and air regulator, valve layout and choose the right equipment for specific problems, in particular, details of the process water piping choice. Since the design of multi-storey buildings, so you can use different levels of process water system vertically with the program, this system apart from supply and return piping risers, there are a tube with the way, because the parallel loop piping total substantially the same length, each user of the water resistance of the coil is substantially equal, so the hydraulic system stability, flow distribution uniform, favorable water balance.
Cold heat source for air-conditioning system, the most important equipment, particularly for air conditioners in terms of such processes. Cold source selection includes not only the requirements of the system itself, but also involves the construction area of energy structure, price, policy guidance, environmental protection, urban planning, building use, size, cooling and heating load, initial investment, operating costs and Fire , safety and maintenance management, and many other issues. So this is a technical, economic comprehensive comparison process, you must press safety, reliability, economy, nature, applicability, the principle of comprehensive technical and economic comparison to determine. This design took a water-cooled parallel units and chillers cooling. Required cooling system pumps, refrigeration pumps and other auxiliary equipment installed in the refrigeration station room, cooling towers installed in the roof. Small water-cooled chiller and cooling capacity. In addition to water-cooled chillers using horizontal shell and tube shell and tube condensers and evaporators, which has simple structure, heat stability, efficiency lasting, easy maintenance features.
The design includes: air-conditioning cooling and heating load calculation; air-conditioning systems to identify and argumentation; air condition parameters and determine the amount of air; air handling equipment selection; cold source selection and equipment selection; airflow calculation; hydraulic calculation; other equipment selection; insulation, vibration and noise elimination and so on. For air conditioning systems used in office buildings designed to combine the characteristics of buildings to conform wind speed, temperature, humidity, and human comfort, is conducive to office staff to better and efficient work. For this design, the use of which in the industrial production process of air-conditioners, not only to fully consider reasonable airflow, temperature, humidity and pressure control and energy saving measures to make the design more reasonable. More importantly, it is reasonable to cold source selection and design process uses parameters to conform to requirements.
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