A heat exchange station control method based on an energy consumption target or a room temperature target

Abstract

The present invention discloses a heat exchange station control method based on energy consumption target or room temperature target, which comprises the following steps: Step S1: Calculate or query the heating energy consumption constraint value of the heating user at 18°C; Calculate the heating user's indoor temperature or room temperature target value t a energy consumption target value at the time; calculate the energy consumption index q corresponding to the heating outdoor calculated temperature of the heating user; according to the energy consumption index q and the energy consumption target value, or the energy consumption index q and the room temperature target value t a Calculate the real-time heat load Q h ; Step S2: According to the real-time heat load Q h With the primary side flow, or real-time heat load Q h The relationship between the primary side flow rate and the secondary side water supply temperature is used to adjust the primary side flow rate or the secondary side water supply temperature of the heating user; the adjustment method of the present invention can be adjusted by both the primary flow rate and the secondary water supply temperature. Through the heat exchange station optimization control method, the company's energy consumption target can be achieved while ensuring the user's room temperature.

Description

Technical Field

[0001] The present invention belongs to the field of central heating regulation, and particularly relates to a regulation method for heat exchange stations based on energy consumption targets or room temperature targets. Background Art

[0002] During the operation of a central heating system, due to various reasons, the flow distribution of the network often does not meet the needs of the heat supply users of the heat exchange stations, resulting in hydraulic imbalance in the pipe network system, failure to reach the room temperature standard of the users, an increase in the user complaint rate, and an increase in the energy consumption of the heating company. The regulation of heat exchange stations relies on manual experience, and the regulation of heat exchange stations is difficult. It is often necessary to adjust the opening degree of the electric control valve according to the change of the outdoor temperature, and neither the regulation effect nor the final energy consumption target can be guaranteed. Moreover, the adjustment curve formulated by the management personnel usually based on climate compensation by experience cannot accurately reflect the actual heat consumption demand of the heat users, which will bring the difference between the supplied heat and the heat actually required by the heat users, resulting in poor heating quality and high heating energy consumption; while the heat load prediction provides an important basis for the optimal regulation of the heat exchange station heating system, and a relatively accurate load prediction can provide a key reference basis for the adjustment of the heating parameters of the heat exchange station. Summary of the Invention

[0003] The purpose of the present invention is to provide a regulation method for heat exchange stations based on energy consumption targets or room temperature targets to solve the problems of high energy consumption of heat exchange stations and non-compliance of room temperature.

[0004] The present invention adopts the following technical solutions: A regulation method for heat exchange stations based on energy consumption targets or room temperature targets, which consists of the following steps:

[0005] Step S1:

[0006] Calculate or query the heating energy consumption constraint value of the heat supply user at 18°C;

[0007] Calculate the energy consumption target value of the heat supply user at the indoor temperature set by the user or the room temperature target value t a ;

[0008] Calculate the energy consumption index q corresponding to the heating outdoor calculation temperature of the heat supply user;

[0009] According to the energy consumption index q and the energy consumption target value, or the energy consumption index q and the room temperature target value t a Calculate the real-time heat load Q h ;

[0010] Step S2:

[0011] According to the relationship between the real-time heat load Q h and the primary side flow rate, or the relationship between the real-time heat load Q h and the secondary side supply water temperature, adjust the primary side flow rate or the secondary side supply water temperature of the heat supply user.

[0012] Further, when the area where the heat supply user is located is a non-provincial capital city, the real-time heat load Q is calculated according to the energy consumption index q and the energy consumption target value. h Step S1 of calculating the real-time heat load Q consists of the following steps:

[0013] Step S101: Query the average temperature t during the period when the average temperature in the area where the heat supply user is located is ≤ +8°C, i the number of days d when the daily average temperature is ≤ +8°C, i the average temperature t during the period when the average temperature in the provincial capital city of the area where the heat supply user is located is ≤ +8°C, j the number of days d when the daily average temperature is ≤ +8°C, j and query the heating energy consumption constraint value Q' of the provincial capital city of the area where the heat supply user is located.

[0014] Step S102: Calculate the heating energy consumption constraint value Q1 of the heat supply user at 18°C. The calculation formula is:

[0015]

[0016] Step S103: Calculate the energy consumption target value Q of the heat supply user at the indoor temperature set by the user, 1a and the calculation formula is:

[0017]

[0018] In the formula, t n ' is the indoor temperature set by the user, and t i is the average temperature during the period when the average temperature in the provincial capital city of the area where the heat supply user is located is ≤ +8°C.

[0019] Step S104: Query the heating outdoor design temperature t w ’ of the heat supply user, and calculate the energy consumption index q corresponding to the heating outdoor design temperature. The calculation formula is:

[0020]

[0021] In the formula, t w is the real-time outdoor temperature, °C; t w ’ is the outdoor design calculation temperature, °C; d i is the number of days when the daily average temperature in the area where the heat supply user is located is ≤ +8°C.

[0022] Step S105: Calculate the real-time heat load Q according to the energy consumption index q and the energy consumption target value Q 1a The calculation formula is: h

[0023]

[0024] Wherein, Q h is the real-time heat load, in kW; ΣQ is the heat consumption index, in GJ / (m 2 ·a); A is the heating area, in 10,000 m 2 .

[0025] Furthermore, when the area is a provincial capital city, the steps for calculating the real-time heat load Q h from the energy consumption index q and the energy consumption target value are as follows:

[0026] Step S101: Query the average temperature t j during the period when the average temperature in the area where the heat supply user is located is ≤ +8°C, and the number of days d j when the daily average temperature is ≤ +8°C. Query the heating energy consumption constraint value Q' of the area where the heat supply user is located.

[0027] Step S102: Calculate the energy consumption target value Q 2a of the heat supply user at the indoor temperature set by the user. The calculation formula is:

[0028]

[0029] Wherein, t n ' is the indoor temperature set by the user, in °C; t j is the average temperature during the period when the average temperature in the area where the heat supply user is located is ≤ +8°C,

[0030] Step S103: Query the outdoor calculated temperature t w ”’ of the heat supply user, and calculate the energy consumption index q corresponding to this outdoor calculated temperature. The calculation formula is:

[0031]

[0032] Wherein, t w is the real-time outdoor temperature, in °C; t w ’ is the outdoor design calculated temperature, in °C; d j is the number of days when the daily average temperature in the area where the heat supply user is located is ≤ +8°C,

[0033] Step S104: Calculate the real-time heat load Q 2a according to the energy consumption index q and the energy consumption target value Q h . The calculation formula is:

[0034]

[0035] Wherein, Q h is the real-time heat load, in kW; ΣQ is the heat consumption index, in GJ / (m 2 ·a); A is the heating area, in 10,000 m 2 .

[0036] Further, when the area is a non-provincial capital city, according to the energy consumption index q and the room temperature target value t a Calculate the real-time heat load Q h The step S1 of

[0037] Step S101: Query the average temperature t during the period when the average temperature in the area where the heating user is located is ≤ +8°C i , the number of days d when the daily average temperature is ≤ +8°C i , the average temperature t during the period when the average temperature in the provincial capital city of the area where the heating user is located is ≤ +8°C j , the number of days d when the daily average temperature is ≤ +8°C j , query the heating energy consumption constraint value Q' of the provincial capital city in the area where the heating user is located

[0038] Step S102: Calculate the heating energy consumption constraint value Q3 at 18°C for the heating user. The calculation formula is:

[0039]

[0040] Step S103: Calculate the energy consumption target value Q of the heating user at the room temperature target value t a 3a , the calculation formula is:

[0041]

[0042] In the formula, ti is the average temperature during the period when the average temperature in the provincial capital city of the area where the heating user is located is ≤ +8°C

[0043] Step S104: Query the heating outdoor calculation temperature t w ’ of the heating user, and calculate the energy consumption index q corresponding to the heating outdoor calculation temperature. The calculation formula is:

[0044]

[0045] In the formula, t n ' is the indoor temperature set by the user, t w is the real-time outdoor temperature, °C; t w ”’ is the outdoor design calculation temperature, °C; d i is the number of days when the daily average temperature in the area where the heating user is located is ≤ +8°C

[0046] Step S105: Calculate the real-time heat load Q according to the energy consumption index q and the room temperature target value t a h ,

[0047]

[0048] In the formula, Q​​h Q is the real-time heat load, in kW; A is the heating area, in 10,000 m² 2 .

[0049] Furthermore, when the area is a provincial capital city, the real-time heat load Q is calculated according to the energy consumption index q and the room temperature target value t a The steps S1 for calculating the real-time heat load Q h consist of the following steps::

[0050] Step S101: Query the average temperature t during the period when the average temperature in the area where the heat supply user is located is ≤ +8°C j , the number of days d when the daily average temperature is ≤ +8°C j , and query the heating energy consumption constraint value Q'' of the area where the heat supply user is located

[0051] Step S102: Calculate the energy consumption target value Q of the heat supply user at the room temperature target value t a , and the calculation formula is:: 4a In the formula,

[0052]

[0053] where t j is the average temperature during the period when the average temperature in the area where the heat supply user is located is ≤ +8°C,

[0054] Step S103: Query the heating outdoor calculation temperature t w ' of the heat supply user, and calculate the energy consumption index q corresponding to the heating outdoor calculation temperature. The calculation formula is::

[0055]

[0056] In the formula, t n ' is the indoor temperature set by the user, t w is the real-time outdoor temperature, in °C; t w ' is the outdoor design calculation temperature, in °C; d j is the number of days when the daily average temperature in the area where the heat supply user is located is ≤ +8°C,

[0057] Step S104: Calculate the real-time heat load Q according to the energy consumption index q and the room temperature target value t a , h ,

[0058]

[0059] In the formula, Q h is the real-time heat load, in kW; A is the heating area, in 10,000 m² 2 .

[0060] Furthermore, the regulation formula for the primary side flow rate in step S2 is::

[0061]

[0062] Wherein, G h is the primary side flow rate, t / h; Q h is the real-time heat load, kW; t g1 is the measured value of the primary side supply water temperature, °C; t h1 is the measured value of the primary side return water temperature, °C.

[0063] Furthermore, the adjustment formula for the secondary side supply water temperature in step S2 is:

[0064]

[0065] Wherein, Q h is the real-time heat load, kW; K is the heat transfer coefficient of the heat exchanger, kW / (m 2 ·°C); F is the heat transfer area of the heat exchanger, m 2 ; t g2 is the measured value of the secondary side supply water temperature, °C; t h2 is the measured value of the secondary side return water temperature, °C, and the average value of the historical data is taken for KF, t g1 is the measured value of the primary side supply water temperature, °C; t h1 is the measured value of the primary side return water temperature, °C.

[0066] The beneficial effects of the present invention are as follows: Using the present invention, the users of the heating company can select according to their own needs in combination with the actual situation of the project. When selecting the energy consumption target mode, only the energy consumption target value for the current heating season needs to be given. When selecting the room temperature target mode, only the target room temperature of the current user needs to be given; the adjustment method of the present invention can be adjusted by two methods: the primary flow rate and the secondary supply water temperature. Through this optimized control method of the heat exchange station, the energy consumption target of the company can be achieved while ensuring the room temperature of the users; the present invention takes the energy consumption target or the room temperature target as the adjustment basis of the heat exchange station, and respectively proposes the load prediction calculation formulas for the energy consumption target and the room temperature target; the load prediction formula is expressed as a functional relationship between the real-time heat load and the energy consumption target or the room temperature target and the outdoor temperature. According to the heating design parameters of different cities, different coefficients can be calculated; the adjustment method uses the primary flow rate adjustment method or the secondary supply water temperature adjustment method to adjust the opening of the regulating valve, and is realized through rough adjustment and PID fine adjustment; when using the secondary supply water temperature method for adjustment, the dichotomy method is proposed to solve the secondary supply water temperature, and the influence relationship of the secondary supply water temperature on the primary and secondary flow rates is obtained. Brief Description of the Drawings

[0067] Figure 1 is the flow schematic diagram of the present invention;

[0068] Figure 2 is the flow schematic diagram of the present invention;

[0069] Figure 3 For the influence of the secondary water supply temperature adjustment of the radiator user in Embodiment 2 of the present invention on the flow rates of the primary and secondary networks;

[0070] Figure 4 For the influence of the secondary water supply temperature adjustment of the floor heating user in Embodiment 2 of the present invention on the flow rates of the primary and secondary networks. Specific embodiments

[0071] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0072] The present invention discloses a heat exchange station regulation method based on an energy consumption target or a room temperature target, as Figure 1 and Figure 2 shown, which consists of the following steps:

[0073] Step S1:

[0074] Calculate or query the heating energy consumption constraint value of the heating user at 18°C;

[0075] Calculate the energy consumption target value of the heating user at the indoor temperature or room temperature target value t a set by the user;

[0076] Calculate the energy consumption index q corresponding to the outdoor calculated temperature for heating of the heating user;

[0077] According to the energy consumption index q and the energy consumption target value, or the energy consumption index q and the room temperature target value t a calculate the real-time heat load Q h ;

[0078] Step S2:

[0079] According to the relationship between the real-time heat load Q h and the primary side flow rate, or the relationship between the real-time heat load Q h and the secondary side water supply temperature, adjust the primary side flow rate or the secondary side water supply temperature of the heating user.

[0080] The area where the heating user is located is divided into provincial capital cities and non-provincial capital cities. According to the energy consumption index, the method of Step S1 is described as follows:

[0081] When the area where the heating user is located is a non-provincial capital city, calculate the real-time heat load Q according to the energy consumption index q and the energy consumption target value h The said Step S1 consists of the following steps:

[0082] Step S101: Query the average temperature t during the period when the average temperature of the area where the heating user is located ≤ +8°C i and the number of days d when the daily average temperature ≤ +8°C iThe average temperature t during the period when the average temperature of the provincial capital city where the heat supply user is located ≤ +8°C j The number of days d when the daily average temperature ≤ +8°C j to query the heating energy consumption constraint value Q'' of the provincial capital city where the heat supply user is located

[0083] Step S102: Calculate the heating energy consumption constraint value Q1 of the heat supply user at 18°C, and the calculation formula is:

[0084]

[0085] Step S103: Calculate the energy consumption target value Q of the heat supply user at the indoor temperature set by the user 1a , and the calculation formula is:

[0086]

[0087] In the formula, t n ' is the indoor temperature set by the user, and t i is the average temperature during the period when the average temperature of the provincial capital city where the heat supply user is located ≤ +8°C,

[0088] Step S104: Query the outdoor calculation temperature t w ’ of the heat supply user, and calculate the energy consumption index q corresponding to the outdoor calculation temperature. The calculation formula is:

[0089]

[0090] In the formula, t w is the real-time outdoor temperature, °C; t w ’ is the outdoor design calculation temperature, °C; d i is the number of days when the daily average temperature of the area where the heat supply user is located ≤ +8°C,

[0091] Step S105: Calculate the real-time heat load Q based on the energy consumption index q and the energy consumption target value Q 1a , h ,

[0092]

[0093] In the formula, Q h is the real-time heat load, kW; ΣQ is the heat consumption index, GJ / (m 2 ·a); A is the heating area, 10,000 m 2 .

[0094] When the area is the provincial capital city, the step S1 of calculating the real-time heat load Q according to the energy consumption index q and the energy consumption target value consists of the following steps: h :

[0095] Step S101: Query the average temperature t during the period when the average temperature in the area where the heating user is located is ≤ +8°C j , and the number of days d when the daily average temperature is ≤ +8°C j , query the heating energy consumption constraint value Q' of the area where the heating user is located,

[0096] Step S102: Calculate the energy consumption target value Q of the heating user when the indoor temperature is set by the user 2a , and the calculation formula is:

[0097]

[0098] In the formula, t n ' is the indoor temperature set by the user, °C; t j is the average temperature during the period when the average temperature in the area where the heating user is located is ≤ +8°C,

[0099] Step S103: Query the outdoor design calculation temperature t w ’ of the heating user, and calculate the energy consumption index q corresponding to the outdoor design calculation temperature. The calculation formula is:

[0100]

[0101] In the formula, t w is the real-time outdoor temperature, °C; t w ' is the outdoor design calculation temperature, °C; d j is the number of days when the daily average temperature in the area where the heating user is located is ≤ +8°C,

[0102] Step S104: Calculate the real-time heat load Q 2a according to the energy consumption index q and the energy consumption target value Q h , and the calculation formula is:

[0103]

[0104] In the formula, Q h is the real-time heat load, kW; ΣQ is the heat consumption index, GJ / (m 2 ·a); A is the heating area, 10,000 m 2 .

[0105] The area where the heating user is located is divided into provincial capital cities and non-provincial capital cities. According to the room temperature index, the method of step S1 is described as follows:

[0106] When the area is a non-provincial capital city, the step S1 of calculating the real-time heat load Q a according to the energy consumption index q and the room temperature target value t h consists of the following steps:

[0107] Step S101: Query the average temperature t during the period when the average temperature in the area where the heat supply user is located is ≤ +8°C i , the number of days d when the daily average temperature is ≤ +8°C i , the average temperature t during the period when the average temperature in the provincial capital city of the area where the heat supply user is located is ≤ +8°C j , the number of days d when the daily average temperature is ≤ +8°C j , query the heating energy consumption constraint value Q' of the provincial capital city where the heat supply user is located,

[0108] Step S102: Calculate the heating energy consumption constraint value Q3 at 18°C for the heat supply user. The calculation formula is:

[0109]

[0110] Step S103: Calculate the energy consumption target value Q of the heat supply user at the room temperature target value t a , and the calculation formula is: 3a

[0111]

[0112] In the formula, ti is the average temperature during the period when the average temperature in the provincial capital city of the area where the heat supply user is located is ≤ +8°C,

[0113]

[0113] Step S104: Query the heating outdoor calculation temperature t w ' of the heat supply user, and calculate the energy consumption index q corresponding to this heating outdoor calculation temperature. The calculation formula is:

[0114]

[0115] In the formula, t n ' is the indoor temperature set by the user, t w is the real-time outdoor temperature, °C; t w ' is the outdoor design calculation temperature, °C; d i is the number of days when the daily average temperature in the area where the heat supply user is located is ≤ +8°C,

[0116] Step S105: Calculate the real-time heat load Q according to the energy consumption index q and the room temperature target value t a , h ,

[0117]

[0118] In the formula, Q h is the real-time heat load, kW; A is the heating area, 10,000 m 2 .

[0119] When the area is the provincial capital city, calculate the real-time heat load Q according to the energy consumption index q and the room temperature target value t a ​h The said step S1 of

[0120] Step S101: Query the average temperature t during the period when the average temperature in the area where the heat supply user is located ≤ +8°C j and the number of days d when the daily average temperature ≤ +8°C j , and query the heating energy consumption constraint value Q'' of the area where the heat supply user is located

[0121] Step S102: Calculate the energy consumption target value Q of the heat supply user at the room temperature target value t a 4a , and the calculation formula is:

[0122]

[0123] In the formula, t j is the average temperature during the period when the average temperature in the area where the heat supply user is located ≤ +8°C,

[0124] Step S103: Query the heating outdoor calculation temperature t w ' of the heat supply user, and calculate the energy consumption index q corresponding to this heating outdoor calculation temperature. The calculation formula is:

[0125]

[0126] In the formula, t n ' is the indoor temperature set by the user, t w is the real-time outdoor temperature, °C; t w ' is the outdoor design calculation temperature, °C; d j is the number of days when the daily average temperature in the area where the heat supply user is located ≤ +8°C,

[0127] Step S104: Calculate the real-time heat load Q according to the energy consumption index q and the room temperature target value t a h ,

[0128]

[0129] In the formula, Q h is the real-time heat load, kW; A is the heating area, 10,000 m 2 .

[0130] Among them, the regulation formula for the primary side flow rate in step S2 is:

[0131]

[0132] In the formula, G h is the primary side flow rate, t / h; Q h is the real-time heat load, kW; t g1 ​​is the measured value of the primary side supply water temperature, °C; t h1 is the measured value of the primary side return water temperature, °C.

[0133] Among them, the adjustment formula for the secondary side supply water temperature in step S2 is:

[0134]

[0135] In the formula, Q h is the real-time heat load, kW; K is the heat transfer coefficient of the heat exchanger, kW / (m 2 ·°C); F is the heat transfer area of the heat exchanger, m 2 ; t g2 is the measured value of the secondary side supply water temperature, °C; t h2 is the measured value of the secondary side return water temperature, °C, KF takes the average value of historical data, t g1 is the measured value of the primary side supply water temperature, °C; t h1 is the measured value of the primary side return water temperature, °C.

[0136] Embodiment 1

[0137] Table 1 Heating energy consumption constraint value Q' for each heating area

[0138]

[0139]

[0140] Since only the energy consumption constraint values of provincial capital cities are given in the above table, the energy consumption constraint values of non-provincial capital cities are calculated as follows: The indoor temperature is the user-set value, which can be set to 20°C. Take Weifang, Shandong as an example.

[0141] Step S101: Through the "Code for Design of Heating, Ventilation and Air Conditioning of Civil Buildings" GB50736-2012, it is found that the average temperature during the period when the average temperature in Jinan is ≤ +8°C is 2.1°C, the number of days when the daily average temperature is ≤ +8°C and the start and end dates are 122 days and 11.13 - 3.14; through the "Code for Design of Heating, Ventilation and Air Conditioning of Civil Buildings" GB50736-2012, it is found that the average temperature during the period when the average temperature in Weifang is ≤ +8°C is 0.8°C, the number of days when the daily average temperature is ≤ +8°C and the start and end dates are 141 days and 11.8 - 3.28; through inquiry, it is known that the energy consumption constraint value of Jinan, the capital city of Shandong Province, is 0.21 GJ / m 2 .a.

[0142] Step S102: Calculate the constraint value of the building heat consumption index when the indoor temperature in Weifang is 18°C:

[0143]

[0144] Step S103: Calculate the energy consumption target value when the indoor temperature rises to 20°C:

[0145]

[0146] Step S104: Query the outdoor design heating temperature t w ' of Weifang through the Code for Design of Heating, Ventilation and Air Conditioning of Civil Buildings GB50736 - 2012, and calculate the energy consumption index q corresponding to the outdoor design heating temperature of Weifang:

[0147]

[0148]

[0149] Step S105: Calculate the real - time heat load Q 1a according to the energy consumption index q and the energy consumption target value Q h ,

[0150]

[0151] This embodiment uses the primary flow rate for regulation:

[0152] The flow rate regulation formula is:

[0153]

[0154] In the formula: G h is the primary - side flow rate, t / h; Q h is the real - time heat load, kW; t g1 is the measured value of the primary - side supply water temperature, °C; t h1 is the measured value of the primary - side return water temperature, °C. Using this formula, the corresponding flow rates at different outdoor temperatures can be calculated according to the load prediction value.

[0155] Embodiment 2

[0156] The indoor temperature is the user - set value, which can be set to 20°C. Taking Jinan, Shandong as an example:

[0157] Step S101: Query through the Code for Design of Heating, Ventilation and Air Conditioning of Civil Buildings GB50736 - 2012 that the average temperature during the period when the average temperature in Jinan ≤ +8°C is 2.1°C, the number of days when the daily average temperature ≤ +8°C and the start and end dates are 122 days and 11.13 - 3.14; through the constraint value of the building heat consumption index in Table 1, query that the energy consumption constraint value of Jinan, the capital city of Shandong Province, is 0.21 GJ / m 2 .a.

[0158] Step S102: When the indoor temperature rises to 20°C, calculate the energy consumption target value Q 2a :

[0159]

[0160] Step S103: Query the outdoor design heating temperature t w ' of Jinan as -5.3 °C through the Design Code for Heating, Ventilation and Air Conditioning of Civil Buildings GB50736-2012, and calculate the energy consumption index q corresponding to the outdoor design heating temperature of Jinan:

[0161]

[0162] Step S105: Calculate the real-time heat load Q 2a according to the energy consumption index q and the energy consumption target value Q h ,

[0163]

[0164] In this embodiment, the heating company can input the set energy consumption target value before the start of the heating season. The energy consumption target value can be given with reference to the outdoor temperature in the previous heating season and this heating season of the heating company. When the energy consumption target value is given, the real-time heat load and the outdoor temperature are in a linear relationship, and the real-time load changes in real time according to the outdoor temperature.

[0165] This embodiment uses the secondary water supply temperature for adjustment:

[0166] For a plate heat exchanger, designed for countercurrent heat exchange, the heat exchange amount adjustment formula is:

[0167]

[0168] In the formula: K - heat transfer coefficient of the heat exchanger, kW / (m 2 ·°C);

[0169] F - heat transfer area of the heat exchanger, m 2 ;

[0170] t g2 —— measured value of the secondary side water supply temperature, °C;

[0171] t h2 —— measured value of the secondary side return water temperature, °C.

[0172] The KF value is obtained by taking the average of historical data. Thus, by solving the above formula, the secondary side water supply temperature can be obtained. The bisection method can be used to solve it. The upper limit of the bisection method is t g1 -0.1, the lower limit is t h2 +0.1, and the accuracy is taken as 0.1 °C.

[0173] Such as Figure 3 and Figure 4As shown in the figure, it is the influence of secondary water supply temperature regulation on the flow rates of the primary and secondary networks. Under the condition of constant heat load, for radiator users, as Figure 3 shown, as the secondary network supply water temperature decreases, the secondary network return water temperature increases proportionally, the secondary network flow rate increases rapidly, and the primary network return water temperature approaches the secondary network return water temperature; for floor heating users, as Figure 4 shown, as the secondary network supply water temperature decreases, the secondary network return water temperature increases proportionally, the secondary network flow rate increases rapidly, and the change in the primary network return water temperature is small; the change in the primary network flow rate is very small.

[0174] Example 3

[0175] If the energy consumption target mode regulation is not adopted but the temperature index is adopted, the ratio of the total energy consumption to the energy consumption constraint value in the formula can be replaced.

[0176]

[0177]

[0178] Substituting formula (1) into formula (2) can be simplified to formula (3), and the simplified formula is:

[0179]

[0180] In the formula, t a is the room temperature target value, °C; t n ' is the indoor temperature set by the user, °C; t w is the real-time outdoor temperature, °C; t w ’ is the outdoor design calculation temperature, °C; Q h is the real-time heat load, kW; A is the heating area, 10,000 m 2 ; q is the energy consumption index corresponding to the heating outdoor calculation temperature, W / m 2 .

[0181] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A heat exchange station regulation method based on an energy consumption target or a room temperature target, characterized in that, It consists of the following steps: Step S1: Calculate or query the heating energy consumption constraint value of the heating user at 18°C; Calculate the energy consumption target value of the heat supply user when the user sets the indoor temperature or the room temperature target value t a ; Calculate the energy consumption index q corresponding to the outdoor calculated temperature for heating of the heating user; According to the energy consumption index q and the energy consumption target value, or the energy consumption index q and the room temperature target value t a Calculate the real-time heat load Q h ; Step S2: According to the real-time heat load Q h and the primary-side flow rate, or the real-time heat load Q h regulate the primary-side flow rate or the secondary-side supply water temperature of the heat supply user according to the relationship with the secondary-side supply water temperature; Wherein, when the area where the heat supply user is located is a non-provincial capital city, the real-time heat load Q is calculated according to the energy consumption index q and the energy consumption target value h The step S1 described above consists of the following steps: Step S101: Query the average temperature t during the period when the average temperature in the area where the heat supply user is located is ≤ +8°C i , the number of days d when the daily average temperature is ≤ +8°C i , the average temperature t during the period when the average temperature in the provincial capital city of the area where the heat supply user is located is ≤ +8°C j , the number of days d when the daily average temperature is ≤ +8°C j , query the heating energy consumption constraint value Q' of the provincial capital city of the area where the heat supply user is located Step S102: Calculate the heating energy consumption constraint value Q1 of the heating user at 18°C, and the calculation formula is: Step S103: Calculate the energy consumption target value Q of the heating user when the user sets the indoor temperature. 1a , and the calculation formula is: where t n ' is the indoor temperature set by the user, and t i is the average temperature during the period when the average temperature of the provincial capital city where the heat supply user is located is ≤ +8°C. Step S104: Query the outdoor heating calculation temperature t w ' of the heating user, and calculate the energy consumption index q corresponding to the outdoor heating calculation temperature. The calculation formula is as follows: where t w is the real-time outdoor temperature, in °C; t w ' is the outdoor design calculated temperature, in °C; d i is the number of days with the daily average temperature in the area where the heat supply users are located ≤ +8°C, Step S105: Calculate the real-time heat load Q based on the energy consumption index q and the energy consumption target value Q 1a h ,​ Where Q h is the real-time heat load, in kW; ΣQ is the heat consumption index, in GJ / (m 2 ·a); A is the heating area, in 10,000 m 2 .

2. The heat exchange station control method based on an energy consumption target or a room temperature target according to claim 1, wherein When the area where the heat supply user is located is the provincial capital city, calculate the real-time heat load Q according to the energy consumption index q and the energy consumption target value h The step S1 described above consists of the following steps: Step S101: Query the average temperature t during the period when the average temperature in the area where the heat supply user is located is ≤ +8°C j , the number of days d when the daily average temperature is ≤ +8°C j , query the heating energy consumption constraint value Q' of the area where the heat supply user is located Step S102: Calculate the energy consumption target value Q of the heating user when the user sets the indoor temperature. 2a , and the calculation formula is: where t n ' is the indoor temperature set by the user, in °C; t j is the average temperature during the period when the average temperature in the area where the heat supply user is located is ≤ +8°C Step S103: Query the outdoor heating calculation temperature t w ' of the heating user, and calculate the energy consumption index q corresponding to the outdoor heating calculation temperature. The calculation formula is as follows: where t w is the real-time outdoor temperature, in °C; t w ' is the outdoor design calculated temperature, in °C; d j is the number of days with a daily average temperature ≤ +8°C in the area where the heat supply user is located, Step S104: Calculate the real-time heat load Q based on the energy consumption index q and the energy consumption target value Q 2a h The calculation formula is:​ Where Q h is the real-time heat load, in kW; ΣQ is the heat consumption index, in GJ / (m 2 ·a); A is the heating area, in 10,000 m 2 .

3. A heat exchange station control method based on an energy consumption target or a room temperature target according to claim 1, characterized in that, When the area where the heat supply user is located is a non-provincial capital city, according to the energy consumption index q and the room temperature target value t a Calculate the real-time heat load Q h The said step S1 consists of the following steps: Step S101: Query the average temperature t during the period when the average temperature in the area where the heat supply user is located is ≤ +8°C i , the number of days d when the daily average temperature is ≤ +8°C i , the average temperature t during the period when the average temperature in the provincial capital city of the area where the heat supply user is located is ≤ +8°C j , the number of days d when the daily average temperature is ≤ +8°C j , query the heating energy consumption constraint value Q' of the provincial capital city of the area where the heat supply user is located Step S102: Calculate the heating energy consumption constraint value Q3 of the heating user at 18°C, and the calculation formula is: Step S103: Calculate the target energy consumption value Q of the heating user at the target room temperature t a when the formula is: 3a The calculation formula is: where t i is the average temperature during the period when the average temperature in the provincial capital city where the heat supply user is located is ≤ +8°C Step S104: Query the outdoor calculated heating temperature t w ' of the heating user, and calculate the energy consumption index q corresponding to the outdoor calculated heating temperature. The calculation formula is as follows: where t n ' is the indoor temperature set by the user, and t w is the real-time outdoor temperature, in °C; t w ' is the design calculation temperature for the outdoor, in °C; d i is the number of days with a daily average temperature ≤ +8°C in the area where the heat supply user is located, Step S105: Calculate the real-time heat load Q according to the energy consumption index q and the room temperature target value t a h ,​ Where Q h is the real-time heat load, in kW; A is the heating area, in 10,000 m 2 .

4. A heat exchange station control method based on an energy consumption target or a room temperature target according to claim 1, characterized in that When the area where the heat supply user is located is the provincial capital city, according to the energy consumption index q and the room temperature target value t a Calculate the real-time heat load Q h The said step S1 consists of the following steps: Step S101: Query the average temperature t during the period when the average temperature in the area where the heat supply user is located is ≤ +8°C j , the number of days d when the daily average temperature is ≤ +8°C j , query the heating energy consumption constraint value Q' in the area where the heat supply user is located Step S102: Calculate the target energy consumption value Q of the heating user at the target room temperature t a when the formula is as follows: 4a The calculation formula is: where t j is the average temperature during the period when the average temperature in the area where the heat supply user is located is ≤ +8°C Step S103: Query the outdoor calculated heating temperature t w ' of the heating user, and calculate the energy consumption index q corresponding to the outdoor calculated heating temperature. The calculation formula is: where t n ' is the indoor temperature set by the user, t w is the real-time outdoor temperature, °C; t w ' is the outdoor design calculation temperature, °C; d j is the number of days with a daily average temperature ≤ +8°C in the area where the heat supply user is located, Step S104: Calculate the real-time heat load Q according to the energy consumption index q and the room temperature target value t a h ,​ Where, Q h is the real-time heat load, in kW; A is the heating area, in 10,000 m 2 .

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