Cold quantity distribution system and method based on flow temperature difference proportion

A cooling capacity distribution and temperature difference technology, applied in the field of cooling capacity distribution system, can solve the problems of unmeasured cooling capacity of variable air volume system, difficult measurement and calibration of humidity and air volume, heavy maintenance workload, etc., to achieve initial investment and later stage Low maintenance and management costs, accurate results, and the effect of achieving hydraulic balance

Inactive Publication Date: 2013-02-06
HARBIN INST OF TECH
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Problems solved by technology

[0015] The present invention aims to solve the cooling capacity distribution problem of apartments and office buildings adopting fan coil air-conditioning system, and to solve the problem of high initial investment and heavy maintenance workload of adopting the water-side cooling meter method, and to solve the problem of time The allocation table method can only be used in systems with graded and fixed wind speeds, and cannot measure the cooling capacity of variable air volume systems, and avoids difficult problems such as relative humidity and air volume in the measurement process of the wind side, which are difficult to measure and verify, thereby providing a flow rate Temperature difference proportional cooling capacity distribution system and method

Method used

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  • Cold quantity distribution system and method based on flow temperature difference proportion
  • Cold quantity distribution system and method based on flow temperature difference proportion
  • Cold quantity distribution system and method based on flow temperature difference proportion

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specific Embodiment approach 1

[0046] Specific implementation mode 1. Combination figure 1 Describe this specific embodiment, flow temperature difference ratio cooling capacity distribution system, it comprises wireless signal transmitting equipment 1, total cooling capacity meter 2, A data collection display 3, computer 8, wireless signal receiving equipment 9, the 3rd communication line 14, N groups of fan coil units 4, N water supply temperature sensors 6, N return water temperature sensors 7, N single point balancing valves 10-1, N single point gate valves 11-1, M branch balancing valves 10-2 , M branch gate valves 11-2, Z group of total balance valves 10-3 and Z total gate valves 11-3; said N groups of fan coil units 4 are divided into A group, A, N, M and Z are all positive integers ;

[0047] The water supply pipes of each group of fan coil units 4 communicate with a water supply branch through a single-point gate valve 11-1, and each water supply branch communicates with a water supply main circuit...

specific Embodiment approach 2

[0057] Embodiment 2. The difference between this embodiment and the flow-temperature-difference proportional cooling capacity distribution system described in Embodiment 1 is that it also includes a fifth communication line 16, the output terminal of the cooling capacity signal of the total cooling capacity meter 2 The fifth communication line 16 is connected to the cooling signal input end of the wireless signal transmitting circuit 1 .

specific Embodiment approach 3

[0058] Embodiment 3. The difference between this embodiment and the flow-temperature-difference proportional cooling capacity distribution system described in Embodiment 1 is that it also includes A second communication lines 13 and N / A water supply temperature sensors 6. The signal output end is connected to a second communication line 13; the return water temperature signal output ends of the N / A return water temperature sensors 7 are also connected to the second communication line 13; A data acquisition displays 3 are respectively connected to A The second communication line 13.

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Abstract

A cold quantity distribution system and method based on flow temperature difference proportion relates to a cold quantity distribution system and method, solving the defects of a current cold quantity metering method and having advantages of accurate and reliable metering result. The method comprises the following steps: a balance valve with a flow measuring function is arranged at front of each tail-end fan coil unit and is used for system hydraulic power balancing regulation and measuring flow through the fan coil unit; a cold quantity meter is arranged at a cold source outlet or an overall main branch; and supply/return water temperature sensors are respectively arranged on user-tail end inlet/outlet pipes and used for transmitting supply/return water temperature and system overall cold supply quantity to a calculator or a data center in a wired or wireless manner for completing cold quantity calculation and distribution operation. The system and the method, provided by the invention, are suitable for an air-conditioning system capable of regulating tail-end speed through make-and-break regulation, three-gear variable-speed regulation and infinitely variable speed regulation, and also suitable for an air-conditioning system capable of regulating the tail-end wind speed through the combination of make-and-break regulation and stepless speed regulation.

Description

technical field [0001] The invention relates to a cold distribution system and method. Background technique [0002] my country's cooling capacity measurement started late, most of the existing buildings did not install cooling capacity measurement facilities, and a small number of new buildings' centralized air-conditioning systems were equipped with cooling capacity measurement instruments. At present, the metering and charging methods used in China include: area method, water-side cooling meter method (integral type, split type), electricity method, and time method; domestic scholars' theoretical research includes: wind-side cooling method, wind-side enthalpy difference method , Harmonic response method. [0003] 1. Area method [0004] Since the requirement of metering was not considered in domestic HVAC design and property management before, no metering device was designed for the air-conditioning system. Therefore, the cooling department charges the cooling cost acc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K17/08
Inventor 方修睦姜永成李辉
Owner HARBIN INST OF TECH
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