Water-mixing regulating method and device of secondary network system of heat exchange unit
A technology of heat exchange unit and adjustment method, which is applied in the directions of heating system, heating method, space heating and ventilation details, etc., can solve the problems of increasing the area of the plate heat exchanger and increasing the cost, and achieves obvious energy saving effect and prolonged The effect of the service life
Inactive Publication Date: 2010-08-11
天津艾耐尔热能设备有限公司
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[0003] The purpose of the present invention is to solve the problem that in the existing heat exchange unit, when the water flow rate of the primary network / the water flow rate of the secondary network is ≥ 1:2, the area of the plate heat exchanger increases a lot, thereby increasing the cost
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Embodiment 1
[0016] Compared with Table 1, for a set of 3MW heat exchange units, the design temperature of the inlet / outlet of the primary network is 100 / 65°C, and the design requirement of the inlet / outlet temperature of the secondary network is 45 / 55°C. Through the solution of the present invention, the flow regulating valve on the parallel connecting pipe is adjusted so that 2 / 3 of the water volume of the secondary network at a temperature of 45°C enters the plate heat exchanger, and the temperature of the water outlet of the plate heat exchanger is 60°C; the temperature is 45°C The other 1 / 3 of the water in the stage network is mixed with the water at the outlet temperature of the heat exchanger at 60°C through the connecting pipe, and the temperature after mixing is exactly 55°C, which meets the design requirements. The selected model of the plate heat exchanger is BRb0.42m-28.14m 2 .
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The invention relates to water-mixing regulating method and device of a secondary network system of a heat exchange unit, aiming to solve the cost problem of the traditional heat exchange unit. The water-mixing regulating method of the secondary network system of the heat exchange unit comprises the following steps of: realizing the heat exchange of two paths of liquid having temperature difference, wherein one path of liquid connected with a hot source or a cold source in series is called as a first network and the other path of liquid connected with the user terminal in series is called as a secondary network; connecting a passage in parallel between the input end and the output end of a plate-type heat exchanger on one path of the secondary network, accessing one part of the liquid of the secondary network to the plate-type heat exchanger for heat exchange, directly mixing the other part of the liquid with the output end of the plate-type heat exchanger via the parallel connected passage and then outputting the liquid. After the passages connected in parallel are increased in the secondary network system, the water flow entering the plate-type heat exchanger is reduced by 30 to 50% compared with the water flow before.
Description
technical field [0001] The invention relates to a hot water central heating system, and further relates to a method and device for regulating mixed water in a secondary network system of a heat exchange unit. Background technique [0002] In recent years, the energy-saving effect of floor heating is better than that of ordinary heating methods, and has been widely used. The characteristics of floor heating heating methods are that the secondary network water flow is large, the temperature difference is small, and the temperature difference is 5°C. The general floor heating system secondary network The water flow is 2 to 3 times that of the primary network, so the area of the plate heat exchanger in the heat exchange unit will increase a lot. Contents of the invention [0003] The purpose of the present invention is to solve the problem that in the existing heat exchange unit, when the water flow rate of the primary network / the water flow rate of the secondary network is ...
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IPC IPC(8): F24D19/00F24D19/10
Inventor 刘毅朱秀红
Owner 天津艾耐尔热能设备有限公司
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