CN100437062C - Hydraulic performance measuring method and apparatus for heat distribution pipe network - Google Patents

Abstract

A heating distribution network hydraulic work condition measuring method and equipment belong to heat supply network move bugging field. Set temperature sensor and hot water runoff sensor on the entrance of each heating spur track to heating distribution network to test the water supply temperature tg and actual testing runoff Lt of the hot water to the heating spur track. Set temperature sensor on the export to heating spur track, inside and outside room of the consumer to test the backwater th to heating spur track, indoor temperature tn and outdoor temperature tw of the consumer. The said sensor send testing value to the data disposal system and the said system deals with the data to get water power maladjustment x of each heating spur track and fact demand flux Ls to each heating user. It ensures the fact demand flux of heating distribution network based on the locale fact load of heating user without destroy the existing pipe system. Its operation is easy with few test parameters for using at locale.

Description

The hydraulic performance measuring method of heat distribution pipe network and device

Technical field

The present invention relates to measuring method and device in a kind of heating network operation debugging field, relate in particular to and a kind ofly be applicable to the in-site measurement of building the heat distribution pipe network hydraulic regime, just regulate and the hydraulic performance measuring method and the device of the heat distribution pipe network of application scenario such as heat distribution pipe network transformation debugging.

Background technology

In heating system, hydraulic misadjustment is meant the actual flow that each thermal substation of hot water heat distribution pipe network (or hot user) is in operation and the inconsistent phenomenon of regulation flow, that is to say, hydraulic misadjustment is meant that heat distribution pipe network can not distribute to each user by the flow (heat) that user (thermal substation or hot user) needs, and causes the phenomenon uneven in temperature of diverse location.The degree of heating system hydraulic misadjustment is weighed with degree of hydraulic misadjustment.By user's Load Distribution flow, make each user's room temperature reach consistent and meet the demands, then lose and be scheduling to 1, instant heating solenoid net does not have the waterpower imbalance.If it is improper to distribute, hot and cold uneven phenomenon appears, hydraulic misadjustment has been described, its imbalance degree is greater than or less than 1.Greater than 1, can make user's room temperature too high, cause heat waste; Less than 1, can make user's room temperature not reach requirement, heat supply is defective.

Therefore, degree of hydraulic misadjustment is the important measurement index of heat distribution pipe network hydraulic regime stability, and the size of its numerical value has directly reflected the stability of network hydraulic operation state.Therefore, the measurement of degree of hydraulic misadjustment is important means and the foundation that network hydraulic operation state is regulated.

The hydraulic regime of heat distribution pipe network regulate be operation flow allocating with each hot user to desirable flow, promptly satisfy the demand volume of hot user's actual load, distribute uneven and cause hot user problem uneven in temperature to solve the water yield.

Before the hydraulic regime that carries out heat distribution pipe network is regulated, at first carry out the measurement of correlation parameter, and then regulate accordingly according to the result who measures according to the regulative mode of taking.According to the difference of regulative mode, the parameter of measurement is also different.

In the prior art, the technology of regulating about hydraulic regime mainly contains model analysis, adjustment method and simple and easy express method etc.Wherein, described model analysis mainly is that whole heating network is set up mathematical model, the actual motion flow by measuring each user and the pressure of each branch's pipeline section fall, calculate the resistance coefficient of each pipeline section, thereby the calculating interflow is carried out the adjusting of hydraulic regime according to the interflow that calculates to each heating power branch road.Described adjustment method mainly is to have utilized the indoor temperature of heating system and confession, the backwater medial temperature of heating system to have this principle of simple corresponding relation, and promptly when indoor temperature equated, it supplied, the backwater medial temperature must equate.So, the adjustment method is to regulate each user's flow according to confession, backwater medial temperature or the return water temperature of measuring each heating power branch road, make each hot user's confession, backwater medial temperature or return water temperature reach consistent, realize that with this each hot user indoor temperature is even each other.Described simple and easy quickly regulating method is regulated according to the following steps:

(1) total flow of measurement heating system changes the operation platform number of water circulating pump or confession, the backwater total valve of regulating system, makes the total interflow of system be controlled at about 120% of total desirable flow;

(2) be as the criterion with thermal source, from the close-by examples to those far off, regulate each branch road, each user's flow one by one.For nearest branch road, user, its interflow is transferred to about 80%～85% of desirable flow; For nearer branch road, user, interflow should be about the 85%-90% of desirable flow; For branch road far away, user, interflow is about the 90-95% of desirable flow; For branch road, user farthest, interflow is advanced to regulate by the 95%-100 of desirable flow;

(3) when the heating system branch road more for a long time, should on female pipe of branch road, equalizing valve be installed.At this moment, still press principle from the close-by examples to those far off, transfer branch road to transfer the user of each branch road more earlier;

(4) in adjustment process, do not meet the requirements of interflow as certain branch road or certain user yet when the variable valve standard-sized sheet, skip this branch road or user this moment, continue to regulate by both definite sequences.After treating that last user's adjusting finishes, check this branch road or this user's operation flow again.If surpass more than 20% with desirable flow deviation, should check, get rid of relevant fault.

But, above-mentioned prior art exists many weak points, as: the adjusting of hydraulic regime is a benchmark with the designing and calculating operating mode all, but, in the actual design process of heat distribution pipe network heating system, therefore the parameter of design conditions might not conform to hot user's actual demand fully, even under hot user or heat distribution pipe network degree of hydraulic misadjustment are adjusted into 1 situation, also can there be phenomenon uneven in temperature in hot user.And in existing hydraulic regime was measured and regulated, measurement had significant limitation with the applicability of control method.As: model analysis requires the structural parameters of the whole pipe network system of input, and operating process is comparatively complicated, is not easy to the rig-site utilization of actual engineering; Though and employing adjustment method adjustment process measurement parameter is single, for bigger heating system, temperature variation lags behind comparatively obvious, can not reflect the actual effect of adjusting apace.Simultaneously, in the application process of above-mentioned prior art, lack quantization parameter, be not easy to the field adjustable of actual engineering each heat distribution pipe network flow and degree of hydraulic misadjustment.

Therefore, adjusting for ease of the in-site measurement and the hydraulic regime of heat distribution pipe network degree of hydraulic misadjustment, need be benchmark and measuring method and device with hot user's actual need flow with degree of hydraulic misadjustment of field data quantification, measure and the adjusting of hydraulic regime with the degree of hydraulic misadjustment that is applied to build heat distribution pipe network, but also do not have such method and device at present.

Summary of the invention

The technical problem to be solved in the present invention is, at the deficiencies in the prior art, a kind of hydraulic performance measuring method and device of heat distribution pipe network are provided, just regulate not in place, hydraulic misadjustment and the serious problem of energy dissipation phenomenon to solve the existing heat distribution pipe network system that causes because of hydraulic regime adjustment method and process are complicated in service.

For solving above-mentioned technical matters, the invention provides a kind of hydraulic performance measuring method of heat distribution pipe network, may further comprise the steps:

Step 1, temperature sensor and hot water flow sensor are set, to measure the supply water temperature t of heating power branch road in the porch of each heating power branch road of heat distribution pipe network _gAnd the measured discharge L of heating power branch road hot water _tAt the outlet of heating power branch road, the indoor and outdoor temperature sensor that is provided with respectively of hot user, measure the return water temperature t of heating power branch road respectively _h, hot user indoor temperature t _hOutdoor environment temperature t _w

The measured value that step 2, the sensor will measure separately sends to data handling system;

Step 3, described data handling system are carried out data processing to the data that receive, and obtain the degree of hydraulic misadjustment x of each heating power branch road according to formula (8), obtain each heating power user's actual demand flow L according to formula (9) _s:

$x=2\×\frac{t_n-t_w}{t_{\mathrm{ns}}-t_w}\·\frac{t_g-[t_{\mathrm{ns}}+(\frac{t_g+t_h}{2}-t_n)\×{\left(\frac{t_n-t_w}{t_{\mathrm{ns}}-t_w}\right)}^{1+b}]}{t_g-t_h}---\left(8\right)$

$L_s=L_t\&CenterDot;\frac{t_g-{\mathrm{<figure-callout\; id="2"\; label="t\; h"\; filenames="C20061008754200141.png,C20061008754200151.png"\; state="\{\{state\}\}">t</figure-callout>}}_h}{2\&times;[t_g-t_{\mathrm{ns}}-(\frac{t_g+t_h}{2}-t_n)\&times;{\left(\frac{t_n{-t}_w}{t_{\mathrm{ns}}-t_w}\right)}^{1+b}]}\&CenterDot;\frac{t_{\mathrm{ns}}-t_w}{t_n-t_w}---\left(9\right)$

Wherein, t _NsBe hot user's indoor design temperature;

B is the index relevant with the heat spreader structures form.

For solving above-mentioned technical matters, the present invention also provides a kind of hydraulic regime measurement mechanism of heat distribution pipe network, comprise measuring unit and data processing unit, described measuring unit comprises supply water temperature sensor and the hot water flow sensor that is arranged at each heating power branch road porch, be arranged at the return water temperature sensor in each heating power branch road exit, be arranged at the indoor temperature sensor of each hot user and hot user's outdoor temperature sensor, described data processing unit receives the measured value that above-mentioned all the sensors sends, and obtain the degree of hydraulic misadjustment x of each heating power branch road according to following formula (8), obtain each heating power user's actual demand flow L according to following formula (9) _s

The hydraulic performance measuring method of heat distribution pipe network of the present invention and device can be used for single heating power branch road, also can be used for many heating power branch road, when measuring, can be from the least favorable branch road of heat distribution pipe network, and the heat source center is measured successively.

The present invention compared with prior art, the present invention is based on the actual demand flow that hot user's field measurement loads to determine heat distribution pipe network, has eliminated to lose in the heat distribution pipe network water conservancy to be scheduling to 1 o'clock cold and hot uniform phenomenon of hot user; The present invention passes through directly to measure the in-site measurement of flow, supply and return water temperature and hot user's indoor and outdoor temperature realization heat distribution pipe network degree of hydraulic misadjustment of heat distribution pipe network branch road, need not to destroy existing pipe system, processing ease, and measurement parameter is few, method is simple; Use method of the present invention and device can on-the-spot show actual flow, demand volume and the current parameters such as degree of hydraulic misadjustment of tested branch road quickly and intuitively, rig-site utilization is very convenient, particularly is useful in engineering application scenarios such as the on-the-spot test of the first adjusting of building the heating network hydraulic regime and hydraulic regime, hydraulic regime test that heat distribution pipe network is transformed and adjusting.

Description of drawings

Fig. 1 is a specific embodiment synoptic diagram of the hydraulic regime measurement mechanism of heat distribution pipe network of the present invention;

Fig. 2 is the structural representation of data processing unit of the present invention.

Fig. 3 is the principle schematic of another specific embodiment of the hydraulic regime measurement mechanism of heat distribution pipe network of the present invention.

Embodiment

Below in conjunction with accompanying drawing and specific embodiment the present invention is described in detail.

Referring to Fig. 1, be a specific embodiment synoptic diagram of the hydraulic regime measurement mechanism of heat distribution pipe network of the present invention.Heat distribution pipe network in the heating system comprises a plurality of hot users 7, a plurality of heat distribution pipe network feed pipes 8, and a plurality of heat distribution pipe network return pipes 9, an end of described a plurality of heat distribution pipe network feed pipes 8 is connected with water trap 10, and the other end is connected with hot user 7; One end of described a plurality of heat distribution pipe network return pipes 9 and hot user 7, the other end is connected with water collector 11.

The hydraulic performance measuring method of heat distribution pipe network of the present invention is:

At first,, temperature sensor 1 and hot water flow sensor 2 are set on heat distribution pipe network feed pipe 8 promptly, to measure the supply water temperature t of heating power branch road in the porch of each heating power branch road of heat distribution pipe network _gAnd the measured discharge L of heating power branch road hot water _tIn the outlet of heating power branch road, on the instant heating solenoid net return pipe 9 temperature sensor 3 is set, be used for measuring the return water temperature t of heating power branch road _h,, measure hot user indoor temperature t respectively in indoor and outdoor temperature sensor 4 and 5 of being provided with respectively of hot user _nAnd outdoor environment temperature t _wEach sensor is connected with data processing unit 6 by transmission line 12.

In Fig. 1, also disclose the hydraulic regime measurement mechanism of heat distribution pipe network of the present invention, promptly comprised a plurality of sensors and a data processing unit.In the present invention, in described data processing unit 6, store various raw data in advance, as the specific heat per unit volume C of water _w, the area of dissipation F of heating radiator, the heat transfer coefficient a of heating radiator, index b relevant and each hot user's indoor design temperature t with the heat spreader structures form _NsOr the like.

Secondly, the measured value that the sensor will measure separately sends to data processing unit 6.

At last, 6 pairs of data that receive of data processing unit are handled, and obtain the degree of hydraulic misadjustment x of each heating power branch road according to formula (8), obtain the hot user's of described heating power branch road actual demand flow L according to formula (9) _sWherein,

$x=2\&times;\frac{t_n-t_w}{t_{\mathrm{ns}}-t_w}\&CenterDot;\frac{t_g-[t_{\mathrm{ns}}+(\frac{t_g+t_h}{2}-t_n)\&times;{\left(\frac{t_n-t_w}{t_{\mathrm{ns}}-t_w}\right)}^{1+b}]}{t_g-t_h}---\left(8\right)$

$L_s=L_t\&CenterDot;\frac{t_g-{\mathrm{<figure-callout\; id="2"\; label="t\; h"\; filenames="C20061008754200141.png,C20061008754200151.png"\; state="\{\{state\}\}">t</figure-callout>}}_h}{2\&times;[t_g-t_{\mathrm{ns}}-(\frac{t_g+t_h}{2}-t_n)\&times;{\left(\frac{t_n{-t}_w}{t_{\mathrm{ns}}-t_w}\right)}^{1+b}]}\&CenterDot;\frac{t_{\mathrm{ns}}-t_w}{t_n-t_w}---\left(9\right)$

Wherein, t _NsBe hot user's indoor design temperature;

B is the index relevant with the heat spreader structures form.

The structural principle of data processing unit 6 as shown in Figure 2, data processing unit 6 comprises signal acquisition circuit 61, signal amplification circuit 62, A/D change-over circuit 63 and microprocessor 64, provides the enough energy by built-in power 60 or external power supply for the work of above-mentioned each circuit.Described signal acquisition circuit 61 is gathered the signal that each sensor sends, and sends signal amplification circuit 62 to, sends to A/D converter 63 through the signal after amplifying, and after the A/D conversion, sends to microprocessor 64, is handled by described microprocessor.

Data processing unit 6 among the present invention at first carries out data acquisition, amplification, A/D conversion to the data that receive, and will receive the data conversion that comes from each sensor is the data that can be discerned, handle by microprocessor.Then, according to the measured discharge L of described heating power branch road hot water _t, described heating power branch road supply water temperature t _gReturn water temperature t _hAnd formula (1) is calculated the actual heating load Q of this heating power branch road _t

Q _t＝L _t·C _w·(t _g-t _h) (1)

Wherein, C _wSpecific heat per unit volume for water;

The actual heating load Q of the described heating power branch road that obtains according to formula (1) _tAnd the linear relationship of thermal load and indoor/outdoor temperature-difference, calculate at design room temperature t by formula (2) _NsUnder this heating power branch road demand heating load Q _s

$Q_s=Q_t\&CenterDot;\frac{t_{\mathrm{ns}}-t_w}{t_n-t_w}---\left(2\right)$

Relation according to the demand heating load shown in the formula (3) and the relation between the demand hot water flow and formula (1)～formula (2) is calculated degree of hydraulic misadjustment x:

Q _s＝L _s·C _w·(t _g-t _hs) (3)

$x=\frac{L_t}{L_s}=\frac{t_g-t_{\mathrm{hs}}}{t_g-t_h}\&CenterDot;\frac{t_n-t_w}{t_{\mathrm{ns}}-t_w}---\left(4\right)$

Heat dissipation capacity computing formula (5) and (6) according to hot user's heating radiator obtain temperature t in the design office _NsThe return water temperature t of following heating power branch road _Hs

$Q_t=a\&CenterDot;F\&CenterDot;{(\frac{t_g+t_h}{2}-t_n)}^{1+b}---\left(5\right)$

$Q_s=a\&CenterDot;F\&CenterDot;{(\frac{t_g+t_{\mathrm{hs}}}{2}-t_{\mathrm{ns}})}^{1+b}---\left(6\right)$

$t_{\mathrm{hs}}=2\&times;[t_{\mathrm{ns}}+(\frac{t_g+t_h}{2}-t_n)\&times;{\left(\frac{t_n-t_w}{t_{\mathrm{ns}}-t_w}\right)}^{1+b}]-t_g---\left(7\right)$

Wherein, a is the heat transfer coefficient of heating radiator; F is the area of dissipation of heating radiator;

Formula (7) substitution formula (4) is obtained the degree of hydraulic misadjustment x of this heating power branch road.

$x=2\&times;\frac{t_n-t_w}{t_{\mathrm{ns}}-t_w}\&CenterDot;\frac{t_g-[t_{\mathrm{ns}}+(\frac{t_g+t_h}{2}-t_n)\&times;{\left(\frac{t_n-t_w}{t_{\mathrm{ns}}-t_w}\right)}^{1+b}]}{t_g-t_h}---\left(8\right)$

Can obtain the heating power user's at this heating power branch road place actual demand flow L by formula (1)～(3) and formula (7) _s

$L_s=L_t\&CenterDot;\frac{t_g-{\mathrm{<figure-callout\; id="2"\; label="t\; h"\; filenames="C20061008754200141.png,C20061008754200151.png"\; state="\{\{state\}\}">t</figure-callout>}}_h}{2\&times;[t_g-t_{\mathrm{ns}}-(\frac{t_g+t_h}{2}-t_n)\&times;{\left(\frac{t_n{-t}_w}{t_{\mathrm{ns}}-t_w}\right)}^{1+b}]}\&CenterDot;\frac{t_{\mathrm{ns}}-t_w}{t_n-t_w}---\left(9\right)$

Wherein, t _NsBe hot user's indoor design temperature;

B is the index relevant with the heat spreader structures form

t _gSupply water temperature for the heating power branch road;

t _hReturn water temperature for the heating power branch road;

t _nBe hot user indoor temperature,

t _wBe outdoor environment temperature.

In addition, the present invention can also be with each above-mentioned measured value, as the supply and return water temperature t of heating power branch road _g, t _h, result of calculation is as the actual heating load Q of every heating power branch road _t, the degree of hydraulic misadjustment x of each heating power branch road and each heating power branch road place heating power user's actual demand flow L _sStorage or demonstration or printout.Accordingly, the hydraulic regime measurement mechanism of heat distribution pipe network of the present invention can also comprise storage unit 20 and/or display unit 30 and/or output interface 40, as shown in Figure 3.Described storage unit 20 is connected with data processing unit 6, is used to store each data that measure and intermediate data that calculates and result data; Described display unit 30 is connected with data processing unit 6, is used to show various measured values and the various result datas by calculating; Described output interface 40 is used for being connected with various external units, as printer.In the present invention, described storage unit 20 can be internal storage, also can be external memory storage, described display unit 30 can also can be the charactron display for LCDs at present commonly used, and described output interface 40 can be one, also can be for a plurality of, can be USB (USB (universal serial bus)) interface, also can be parallel bus interface or IEEE1394 interface, or any interface that is used to transmit data.

In addition, need to prove, each sensor shown in Fig. 1 only shows and can be connected by transmission line 12 with data processing unit 6, also can carry out the transmission of data by the mode of wireless telecommunications, when adopting the transmission mode of wireless telecommunications, each sensor has wireless transmit portion, and data processing unit 6 has wireless receiving portion, this dual mode of wire transmission described here and wireless transmission not only can use separately, also can be used in combination.

The present invention is based on hot user's field measurement and load to determine the actual demand flow of heat distribution pipe network, eliminated in the mistake of heat distribution pipe network water conservancy and be scheduling to 1 o'clock hot user even phenomenon uneven in temperature; The present invention directly measures flow, supply and return water temperature and hot user's indoor and outdoor temperature of each branch road of heat distribution pipe network, realize the in-site measurement of heat distribution pipe network degree of hydraulic misadjustment, need not to destroy existing pipe system, processing ease, measurement parameter is few, method is simple, and rig-site utilization is very convenient.

It should be noted last that, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not breaking away from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.

Claims (10)

1. the hydraulic performance measuring method of a heat distribution pipe network is characterized in that, may further comprise the steps:

Step 1, temperature sensor and hot water flow sensor are set, to measure the supply water temperature t of heating power branch road in the porch of each heating power branch road of heat distribution pipe network _gAnd the measured discharge L of heating power branch road hot water _tAt the outlet of heating power branch road, the indoor and outdoor temperature sensor that is provided with respectively of hot user, measure the return water temperature t of heating power branch road respectively _h, hot user indoor temperature t _nAnd outdoor environment temperature t _w

The measured value that step 2, the sensor will measure separately sends to data handling system;

Step 3, described data handling system are carried out data processing to the data that receive, and obtain the degree of hydraulic misadjustment x of each heating power branch road according to formula (8), obtain actual demand flow L to hot user that should the heating power branch road according to formula (9) _s, wherein,

$x=2\&times;\frac{t_n-t_w}{t_{\mathrm{ns}}-t_w}\&CenterDot;\frac{t_g-[t_{\mathrm{ns}}+(\frac{t_g+t_h}{2}-t_n)\&times;{\left(\frac{t_n-t_w}{t_{\mathrm{ns}}-t_w}\right)}^{1+b}]}{t_g-t_h}---\left(8\right)$

$L_s=L_t\&CenterDot;\frac{t_g-t_h}{2\&times;[t_g-t_{\mathrm{ns}}-(\frac{t_g+t_h}{2}-t_n)\&times;{\left(\frac{t_n-t_w}{t_{\mathrm{ns}}-t_w}\right)}^{1+b}]}\&CenterDot;\frac{t_{\mathrm{ns}}-t_w}{t_n-t_w}---\left(9\right)$

Wherein, t _NsBe hot user's indoor design temperature;

B is the index relevant with the heat spreader structures form.

2. the hydraulic performance measuring method of heat distribution pipe network according to claim 1 is characterized in that, described formula (8) and formula (9) obtain according to following steps:

Step 31, according to the measured discharge L of formula (1) and described heating power branch road hot water _t, described heating power branch road supply water temperature t _g, return water temperature t _hCalculate the actual heating load Q of this heating power branch road _t

Q _t＝L _t·C _w·(t _g-t _h)(1)

Wherein, C _wSpecific heat per unit volume for water;

The actual heating load Q of step 32, the described heating power branch road that obtains according to formula (1) _tAnd the linear relationship of the thermal load and the indoor and outdoor temperature difference, calculate at design room temperature t by formula (2) _NsUnder described heating power branch road demand heating load Q _s

Wherein, $Q_s=Q_t\&CenterDot;\frac{t_{\mathrm{ns}}-t_w}{t_n-t_w}---\left(2\right)$

Step 33, calculate degree of hydraulic misadjustment x according to the relation of the demand heating load shown in the formula (3) and the relation between the demand hot water flow and formula (1)～formula (3):

Q _s＝L _s·C _w·(t _g-t _hs) (3)

$x=\frac{L_t}{L_s}=\frac{t_g-t_{\mathrm{hs}}}{t_g-t_h}\&CenterDot;\frac{t_n-t_w}{t_{\mathrm{ns}}-t_w}---\left(4\right)$

Step 34, obtain temperature t in the design office according to heat dissipation capacity computing formula (5) and (6) of hot user's heating radiator _NsThe return water temperature t of following heating power branch road _Hs

$Q_t=a\&CenterDot;F\&CenterDot;{(\frac{t_g+t_h}{2}-t_n)}^{1+b}---\left(5\right)$

$Q_s=a\&CenterDot;F\&CenterDot;{(\frac{t_g+t_{\mathrm{hs}}}{2}-t_{\mathrm{ns}})}^{1+b}---\left(6\right)$

$t_{\mathrm{hs}}=2\&times;[t_{\mathrm{ns}}+(\frac{t_g{+t}_h}{2}-t_n)\&times;{\left(\frac{t_n-t_w}{t_{\mathrm{ns}}-t_w}\right)}^{1+b}]-t_g---\left(7\right)$

Wherein, a is the heat transfer coefficient of heating radiator; F is the area of dissipation of heating radiator;

Step 35, the degree of hydraulic misadjustment x that formula (7) substitution formula (4) is obtained this heating power branch road are:

$x=2\&times;\frac{t_n-t_w}{t_{\mathrm{ns}}-t_w}\&CenterDot;\frac{t_g-[t_{\mathrm{ns}}+(\frac{t_g+t_h}{2}-t_n)\&times;{\left(\frac{t_n-t_w}{t_{\mathrm{ns}}-t_w}\right)}^{1+b}]}{t_g-t_h};$

Can obtain the heating power user's at this heating power branch road place actual demand flow L by formula (1)～(3) and formula (7) _sFor:

$L_s=L_t\&CenterDot;\frac{t_g-t_h}{2\&times;[t_g-t_{\mathrm{ns}}-(\frac{t_g+t_h}{2}-t_n)\&times;{\left(\frac{t_n-t_w}{t_{\mathrm{ns}}-t_w}\right)}^{1+b}]}\&CenterDot;\frac{t_{\mathrm{ns}}-t_w}{t_n-t_w}.$

3. the hydraulic performance measuring method of heat distribution pipe network according to claim 1 and 2, it is characterized in that, in the described step 2, described each sensor will detect the measured value that obtains separately by wireless transmission or wire transmission or mode that the two combines and send to described data handling system.

4. the hydraulic performance measuring method of heat distribution pipe network according to claim 1 and 2 is characterized in that, also comprises step 4:

Described data handling system is stored measured value and/or the data result that calculates, and/or outputs on the display screen and show, and/or exports by printer prints.

5. the hydraulic regime measurement mechanism of a heat distribution pipe network, comprise measuring unit and data processing unit, it is characterized in that, described measuring unit comprises supply water temperature sensor and the hot water flow sensor that is arranged at each heating power branch road porch, be arranged at the return water temperature sensor in each heating power branch road exit, be arranged at indoor temperature sensor of each hot user and outdoor temperature sensor, described data processing unit receives the measured value that above-mentioned all the sensors sends, obtain the degree of hydraulic misadjustment x of each heating power branch road according to formula (8), obtain actual demand flow L hot user that should the heating power branch road according to formula (9) _s:

$x=2\&times;\frac{t_n-t_w}{t_{\mathrm{ns}}-t_w}\&CenterDot;\frac{t_g-[t_{\mathrm{ns}}+(\frac{t_g+t_h}{2}-t_n)\&times;{\left(\frac{t_n-t_w}{t_{\mathrm{ns}}-t_w}\right)}^{1+b}]}{t_g-t_h}---\left(8\right)$

$L_s=L_t\&CenterDot;\frac{t_g-t_h}{2\&times;[t_g-t_{\mathrm{ns}}-(\frac{t_g+t_h}{2}-t_n)\&times;{\left(\frac{t_n-t_w}{t_{\mathrm{ns}}-t_w}\right)}^{1+b}]}\&CenterDot;\frac{t_{\mathrm{ns}}-t_w}{t_n-t_w}---\left(9\right)$

Wherein, t _NsBe hot user's indoor design temperature;

B is the index relevant with the heat spreader structures form;

t _gSupply water temperature for the heating power branch road;

t _hReturn water temperature for the heating power branch road;

t _nBe hot user indoor temperature,

t _wBe outdoor environment temperature.

6. the hydraulic regime measurement mechanism of heat distribution pipe network according to claim 5 is characterized in that, described hot water flow sensor is a ultrasonic flow sensor.

7. according to the hydraulic regime measurement mechanism of claim 5 or 6 described heat distribution pipe networks, it is characterized in that the mode that described each sensor sends signal is wired or/and the wireless communication transmission mode.

8. according to the hydraulic regime measurement mechanism of claim 5 or 6 described heat distribution pipe networks, it is characterized in that, also comprise storage unit and/or display unit and/or output interface;

Described storage unit is connected with data processing unit, is used to store various measurement data and intermediate data that calculates and result data;

Described display unit is connected with data processing unit, is used to show various measured values and the various result datas by calculating;

Described output interface is connected with data processing unit, is used for being connected with various external units.

9. the hydraulic regime measurement mechanism of heat distribution pipe network according to claim 8 is characterized in that, described output interface be USB (universal serial bus) or/and parallel bus interface or/and the IEEE1394 interface.

10. the hydraulic regime measurement mechanism of heat distribution pipe network according to claim 5, it is characterized in that, described data processing unit comprises signal acquisition circuit, signal amplification circuit, A/D converter and microprocessor, described signal acquisition circuit is gathered the signal that each sensor sends, and send signal amplification circuit to, send to A/D converter through the signal after amplifying, after the A/D conversion, send to microprocessor, handle by described microprocessor.

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