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A determination method of residential heating terminal capacity based on q-τ curve

A determination method and residential technology, applied in the field of heating of residential buildings, can solve problems such as the deviation of the calculation results of the steady-state method, the inability of the steady-state algorithm to calculate, and the inability of the steady-state algorithm to calculate the time dimension

Active Publication Date: 2019-07-02
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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Problems solved by technology

However, in the hot summer and cold winter regions in southern my country, room-by-room and time-sharing discontinuous heating is the mainstream heating mode. The steady-state algorithm cannot calculate the impact caused by the discontinuity in the time dimension. Therefore, the calculation results of the steady-state method will have a large deviation
[0004] Discontinuous heating by room and time sharing will cause problems such as heat storage and release, and the steady-state algorithm cannot be calculated

Method used

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  • A determination method of residential heating terminal capacity based on q-τ curve
  • A determination method of residential heating terminal capacity based on q-τ curve
  • A determination method of residential heating terminal capacity based on q-τ curve

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Embodiment

[0066] The target building of this embodiment is a multi-storey residence located in Changsha in my country's hot summer and cold winter region, with a total of 7 floors, a floor height of 2.7m, and a window-to-wall ratio of 0.4. See building plans figure 2 . The construction area of ​​each floor is 336m 2 , 4 households on each floor, with 3 bedrooms and 1 living room, and one household on the west middle floor is used as the calculation object.

[0067] Residents' activities are concentrated in the living room and bedroom, so only the living room and bedroom are equipped with heating, and the other rooms are not heated. The heating temperature is set at 20°C. The heating season is calculated from November 15th to February 15th, a total of 92 days. Assuming that the doors and windows of the room are tightly closed, the ventilation is based on the number of air changes per hour throughout the day -1 .

[0068] Step 1: Input the residential target building, outdoor meteoro...

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Abstract

The invention provides a house heating terminal capacity determination method based on Q-t curves. The method comprises the following steps: the unit area hourly heating load in the whole heating season is calculated by using unstable building simulation software according to a house target building, envelop enclosure thermal parameters, outdoor climatic parameters, an inner disturbance mold and a zero-dimension heating time length t; an unguaranteed hour number is calculated according to 5 unguaranteed days of the mean daily temperature in the heating season to determine a design day and a heating designed load Q; when preheating is not performed, a Q-t graph is directly drawn out; when preheating is performed, different preheating times and preheating temperatures are input in the unstable building simulation software again, the corresponding heating designed load Q with preheating is obtained according to the determined design day, and the Q-t curves with preheating are drawn to build a Q-t curve cluster; and a designer can respectively determine the terminal capacities with or without preheating according to the Q-t curve cluster and the user demands. The method effectively overcomes main limitation in traditional house heating terminal capacity selection, and can realize reasonable selection of compartmenting and time-sharing heating terminal capacities to prevent the problem of higher or lower equipment capacity.

Description

technical field [0001] The invention belongs to the technical field of residential building heating in heating engineering, and in particular relates to a method for determining the terminal capacity of residential heating based on a Q-τ curve. Background technique [0002] The reasonable choice of the capacity of the residential heating terminal is an important link to ensure the good effect of residential heating and the economy of the heating system. If the terminal capacity of residential heating is not properly selected, when the terminal capacity is too large, the heating capacity will far exceed the heating load, resulting in waste of initial investment costs; if the terminal capacity is too small, the heating capacity will not reach the heating load. Therefore, the indoor temperature cannot meet the design requirements, thus affecting the indoor thermal comfort. In order to avoid the above-mentioned unfavorable situations, it is necessary to make a reasonable determ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F24D19/10
CPCF24D19/10
Inventor 王智伟郑以翔范丽聪闫增峰
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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