JPS5943404A - Pump operating method - Google Patents

Abstract

PURPOSE:To hold the water level in a water distribution tank at a prescribed limit, to secure a consumer head and water consumption and to decrease the frequency of pump switching by setting a maximum and a minimum discharge for daily water consumption and performing operation within this range. CONSTITUTION:The maximum and minimum pump discharge are set for the daily water consumption and the operation is carried on within the range. For example, necessary data are set initially for one operation facility 1 consisting of plural pumps arranged in parallel and estimated daily water consumption and a maximum and a minimum pump discharge are supplied to set the number of pumps in operation and pump discharges at prescribed intervals of time on the basis of said data. The operation facility 1 is put in operation by a set operating method to supply water from a water purifying plant 6 to the water distributing tank 3 through a water distribution system 2 and the water level variation of the distribution tank 3, consumer head, etc., are checked to distribute water to comsumer terminals 5 through piping 4 in the best state.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a bonno delivery method suitable for application to pump plant equipment for water supply and sewage, irrigation water, and government water temples, and is designed to minimize operating costs. This paper relates to the knee-to-center rolling force method in which synthesis is switched.

In the case of a water supply bong plant, a bong installation 1 consisting of multiple pumps installed in parallel is installed as shown in Figure 1.
These pumps supply water from the water purification pond 6 to the water distribution tank 3 through the distribution line 2, and from this water distribution tank 3, water is distributed to the descendant Yongduan 5 via the distribution line 4. I'm counting on 1 to make it happen.

In such a pump plant system, the pump.

It is necessary for the operator to operate a plurality of pumps by appropriately switching over them depending on the moment-to-moment changes in the water supply required by the descendants (current pump discharge h). This bone cutting is named after the following.

(1) The water level of the water distribution tank 3 is maintained within the yoke of Domin and Shimoichigitsune.

(2) By minimizing the number of pump incisions, the occurrence of pump failures is reduced and the burden of continuous tumor production is reduced.

(3) Reduce the cost of using a bong (4) 1 water on the end! Ensure a sufficient amount of water.

However, the current situation is that the operation of J2;H+-j monthly shellfish is based on the operator's previous experience, and for this reason, this manual power transfer method does not allow for the quantitative planning of the valley-doku construction method. Otherwise, there will be disadvantages such as ℃ and ivy.

On the other hand, many inspections have been made public in the evening for the 1l11 mobilization of this persimmon pump operator, especially the number J: ♀ Elbow I four methods to calculate the pump's tonne force, iU. A driving method that minimizes the number of bong cuts, a reversing method that minimizes the number of bong cuts, and a driving method that minimizes water level fluctuations in the water tank 3 are known.

Unconsciously, I made sure to keep the water level in the water distribution tank within the specified limits while ensuring that the water level of the water distribution tank was within the specified limit.

The purpose of this invention is to provide a completely new method for turning off the pump by reducing the number of times the pump is turned off and minimizing operating costs.

According to Sashiaki Honsashi, the operating area was the name of the place where the first few fixed-rotation rotary pumps of Tani Zenyo Arashi were given, and the shark water supply in the 111th edition.
As expected, I',! IT run 1υ'' between jυ, I stopped trying to deal with the change in A, and I was trying to make a real change. For the convex water side, set the maximum and J collection and small Bonzo discharge position, and within this Guo 1 phase, it will roll, and it will be 9, and the J line will be phantom, and the water box will change to a sea bream. ξυ within the set maximum and minimum discharge 1i
Each offshore 1
(Considering the Sakamo-ta that is held as a stop-out mouse), these are the driving methods for 2 draws (1y "square" + ii ii K-husband, etc.), and the driving cost and cut-off number are reduced. Day 113'''face'
We are trying to quickly select an operating method that minimizes the number of switching operations using the data that minimizes operating costs, without repeating the old tricks of Harizuro Teishi in the midst of storms and storms.

The preferred real MNtlJ of Book 6, illustrated in FIGS. 2 to 4, will be described in detail below.

Figure 2 shows the elements of the 2-bu-hirofu-1-ko of Bong Shutenriki by Fuei Akira, and I will explain the same content below.

In element 10, the first operation point (Bongumi stop b, waterway,
Water distribution tank water head, Kamo Hong (!Ii force 1 (hb),
Operation pump intersection 4) and constants (water head in the water purification pond, pump characteristics, continuous change time interval Δt (Δt is determined based on the time required to start and stop the pump, the fluctuation range of the water supply amount, etc.),
Give the maximum dimension time (K, Δ1, etc.).

Element] 1 or give 196 points of water to be piled up.
11. As shown in Figure 3, the January price is 18% low, and it is a function of time. In addition, this element includes the discharge amount of all cylinders, the maximum amount of water in the distribution tank, the maximum amount of water in the tank, and the maximum amount of water in the tank.
Water supply, Pong cavidation/water head, water purification, water level, indication.

Of course, the ribbon is bold and provides the minimum discharge amount. In Fig. 3, Silkworm? , No. 1 20 indicates the water storm, 21 indicates the maximum pump discharge f(i, and 22 indicates the minimum pump discharge amount.

In element 12, I
+i-Δ1 (1 is any value for I-) time ahead Fu'an Melon (
Water 11i decides whether or not it will be released.

Element 13 determines the fuel oil (discharge amount) of the pump stand and the number of pumps.

In element 14, the operating point of the pump I pump is determined by i-Δ.

Element 15 controls the operating cost and number of cuttings at that pump operating point by ':f+.

In element 16, it's the present moment! - Determine whether Δ has been evaluated for one day every fJ.

In element 17, it is determined whether 1 to K are repeated as l of l-Δt.

In element 18, the minimum number of pump switching times is 1.
) and the minimum operating cost operating method (operating method ①), but the evaluation was repeated.

In the case of element 19, the current 1h of j-soba<#Y
flllJ (Determine the optimum pump number switching time and the number of pumps at that time using a 2XK hammer base.

More specifically, in elements 1o and 11, necessary data is initialized 1. as described above. The predicted demand for water supply during H period and the maximum/minimum Honda discharge by one company are -Fjλ, and based on these data, Δ is always calculated as described above at 1fiJ i6. Here, it is assumed that 1 m of pump installation consists of a constant number of rotational speed pumps with a valley ψ and a large discharge amount, and two types of pumps are considered as the operating method. As shown in Fig. 4, the pump discharge amount is always set between the maximum pop discharge amount 21 and the minimum pop discharge amount 22, but first of all, as the first operating method, the pump discharge amount is set to be between the maximum pop discharge amount 21 and the minimum pop discharge amount 22. From the current point t, the pop discharge amount ahead of ΔtII 1i41 is the maximum.
Minimum discharge - If the curve is the same, the number of pumps in continuous operation should not be changed (No. 4, No. 23), and the operation method II is to increase the maximum and minimum discharge from the lowest point of operation cost. This is a method (41st numeral 24) of switching the number of bongs to be as close to the minimum discharge amount as possible between the volume curves.

From the current time t p i@Δt (i = 1.2...-, it is constant) the pop discharge amount in the future will maintain the same discharge amount as the current time unless the current number of pumps in operation is changed9. Shikashi,
If 1・Δ is expected to be outside the range of the maximum and minimum pop discharge amount set in 1. (determined by element 12).

The required discharge change -Δq(t) is given by the equation (1).

However, maxQL(t"t+i ・Δt) is $ Wj
The minimum pop discharge amount from point t to 1・Δ1 hour ahead, m1nQn (1-1+biΔt), is the current time t or r:)
1・Δ is the minimum value of the maximum pop discharge amount up to the time, Q(
1) does not indicate the pop discharge amount at time m.

For this discharge change 1uΔQ(t)iv, the algorithm for switching the number of continuous rotation units at the current equipment capacity is shown below (element 13).

The number of pop-ups currently in use is fN□, N2,...

Nll1. Nl currently unused and usable popup welcome.

I]2. ...' ``ITI, Bo/P discharge per unit-
QIrQ2・°”″・QIn is Jku “Nbu spoon duty” and the transfer is θ Kei Δn,, 20, 1.... Shun, n
e (l-1~rn) The increase in discharge amount is ΔQj −Σ Δn, sQB (E =
, 1ゝh1) (2nr21 The number of possible activation combinations is (n, +1)ψ(n2+1)"・(nm+1)=II
Express it as Cnl+1)k21.

11' Here, ΔQJ(t) s (3==l~II
(nl + January E = z Select several cases. Furthermore, among them, the number of starting pumps (Σ
Δ114) is small, and the number of units that can be locked in one board is Δ120, 1. . . . NIl (for g+=1~) Also for the small discharge amount chart, select the Bo μ: 1 knob combination case from II (N, +1) combinations.

For the pump capacity and weight thus determined and the number of pumps, the turning point at time L+i·Δt is determined using the following analytical formula (element 14).

HP(t)2=HD I)−Ha+ΔH(Σ(N
I, (t)-Qg(t)') (41-1 Q Balini f1k(HP(t))
+6)ηbat)2f2℃(Q,g(t) )
(7) However, Hp(i) is pump discharge water fm,
(t) is the distribution tank water head, ΔH is the piping head loss, H
o is water purification pond hydroponic, Nl (t) is the number of pumps used (ll = 1~m), Ql is pump discharge amount/unit (l
V, =, 1~1η], A) Water distribution tank cross-sectional area, Q
D(t) is the expected demand water supply f1 is the pump characteristic (l=1
~m), η℃(1) is the bong illusion rate (t3=-21~m)
, f2 shows a note with bong efficiency.

A total of 1 in element 15 for the change point determined in this way
Let's play the song. As for the number of switching times, if there is a switching at 4 o'clock, it is counted once (even if the switching occurs at the same time, it is counted as 1 time).

The cost, or power consumption, of one 4-wheeled car is determined by the following. However, η is the motor efficiency.

By the way, the total 1 (,) period of the day given by ':l water supply storm name in Figure 3 is tough and 1 Δt (arbitrary of i21~) time 1υ, (2 times l' is t + 21 · Δt) Repeat elements 12 to 15 to perform a total of 1 songs of Hi 1 Tsukasa (16).

After this, change ■ and repeat 9 times of elements 12 to 16 for the value of 1 from 1 to K, 1 time per day for a total of 1
Perform a song (element 17).

Then, the above driving evaluation is carried out regarding driving method 1 and ■ (element 18). This completes the two-day evaluation of the driving method for the case from now on.

Based on this evaluation, the case with the lowest operating cost is selected, and one operating method with the least number of switching is selected from among them.

This is a daily evaluation, and it is sufficient to implement the operating method at time t determined in this selection case at the present time.

Changes in demand forecasts and other data
Calculate elements 2 to 19 each time, or usually for each Δ.According to the present invention, an operating method that reduces operating costs and cutting times is calculated based on the expected demand amount. Evaluate with
Find out the best way to drive in this situation! The operation adopted there will be adopted at the current time.・In general, there are six operating methods (switching time, variable discharge rate, number of starting/stopping pumps, volume of peaches, etc.), and the most suitable (minimum operating cost) is selected from all of them. It is not possible to choose the driving method. For this reason, we have selected several cases in advance and selected the most suitable case from among the seven. First, by determining the maximum and minimum pump discharge amounts, it is possible to ensure a stable pop-up operation range, a limited range of water level fluctuations in the water distribution tank, and a stable flow of water. In addition, the operating method is limited to 1 and 1, and the case with the least number of pump pumps and the lowest operating cost is selected. By changing the pump promotion interval consideration from 1 to K, the optimum switching time can be selected. Regarding the pump buildings and number of pumps when switching over, we have selected a combination that requires fewer switches and is more efficient in operation than all combinations of existing equipment. Based on the above, from among the operating methods for the 2/K case, the operating method that minimizes the pump operating cost and has the least amount of praise in history has been determined. The driving method performed in the first time step of the driving method is implemented at the present moment (1) //I! 1, it is possible to continuously switch the number of units at the current time for optimal operation at 1 yaw Ibj.

Figure 1 is a diagram showing an example of a pump gland system for waterworks to which the "unexploded 1jJ" method is applied, and Figure 2 shows the operation flow of the pump operation method according to the present invention. 3 and 3 are diagrams showing an example of changes in daily expected water supply amount, and FIG. 4 is a diagram for explaining the method of the present invention.

1. Pump installation (1 source, 2. Self-pipe ho, 3. Self-water tank, 4. Piping, 5. Descendant home end, 6. Water purification pond.
20... Simple J9 fetal fluid-121... Maximum pop discharge amount, 2
2.-Minimum pop discharge amount, 23.. Operating method 1124..
Driving Law U525: Case where the switching time interval is changed.

Claims (1)

[Claims] Consulting l-111, lJ + Hiyaku Anhod Water-, set the Mondai and Minimum end ng discharge - Song IH, and set the maximum and minimum effusion from the current time to the previous maximum and minimum effusion + 1th1 gland. The continuous operation cost and the number of switching times are evaluated for each time step for each of the minimum number of pump switching methods and the minimum continuous rotation method that brings the number of pumps close to the minimum discharge curve. Considering the number and capacity of the pumps, from all combinations of the number of units that can be started or stopped when switching pumps, select the number that will minimize the number of units to be switched and maximize operating efficiency, and Yuzu 1.
Using the daily forecast from the current time as a pattern, we calculate the case with the minimum cost from the above-mentioned minimum operating cost continuous method, and the case where the minimum number of pumps is switched from the minimum number of pumps switching method using the daily lr + J plan. A pump operating method characterized in that the bong cutting at the current time is performed at a predetermined rectangular time interval of 1 fJ.