Медведев Г.Г., Максимов В.И., Половников В.Ю. Практикум по гидравлическим расчетам в теплоэнергетике

Подождите немного. Документ загружается.

(ɪɢɫɭɧɨɤ). Ɉɩɪɟɞɟɥɢɬɶ ɜɟɥɢɱɢɧɭ ɯ, ɟɫɥɢ Ɋ = 300 ɇ; G = 200 ɇ; d = 0,1 ɦ;

h = 0,4 ɦ; ȡ = 1000 ɤɝ/ɦ

; g = 10 ɦ/ɫ

Ɉɬɜɟɬ: 5,97 ɦ.

20. ɇɚ ɡɚɮɢɤɫɢɪɨɜɚɧɧɵɣ ɧɚ ɩɨɥɭ ɩɨɪɲɟɧɶ ɨɩɢɪɚɟɬɫɹ ɰɢɥɢɧɞɪɢɱɟ-

ɫɤɢɣ ɫɨɫɭɞ ɛɟɡ ɞɧɢɳɚ, ɡɚɩɨɥɧɟɧɧɵɣ ɜɨɞɨɣ. Ɉɩɪɟɞɟɥɢɬɶ ɜɟɥɢɱɢɧɵ ɞɚɜ-

ɥɟɧɢɹ

ɢ ɪ

(ɪɢɫɭɧɨɤ), ɟɫɥɢ ɜɟɫ ɫɨɫɭɞɚ G = 103 ɇ; ȡ = 1000 ɤɝ/ɦ3;

ɚ = 0,8 ɦ; D = 0,4 ɦ; g = 10 ɦ/ɫ

Ɉɬɜɟɬ: 15,960 ɇ/ɦ

21. ɉɶɟɡɨɦɟɬɪ ɢ ɞɜɚ ɠɢɞɤɨɫɬɧɵɯ ɦɚɧɨɦɟɬɪɚ ɩɪɢɫɨɟɞɢɧɟɧɵ ɤ ɪɟɡɟɪ-

ɜɭɚɪɭ (ɪɢɫɭɧɨɤ), ɧɚɩɨɥɧɟɧɧɨɦɭ ɛɟɧɡɢɧɨɦ ɞɨ ɨɬɦɟɬɤɢ 2 ɦ (

= 700

ɤɝ/ɦ

). Ɉɩɪɟɞɟɥɢɬɶ ɩɨɤɚɡɚɧɢɹ ɦɚɧɨɦɟɬɪɚ Ɇ ɢ ɩɶɟɡɨɦɟɬpa H ɞɥɹ ɭɪɨɜɧɟɣ

ɜɨɞɵ, ɪɬɭɬɢ, ɭɤɚɡɚɧɧɵɯ ɧɚ ɪɢɫɭɧɤɟ ɜ ɦɟɬɪɚɯ. ɉɥɨɬɧɨɫɬɶɸ ɜɨɡɞɭɯɚ ɦɨɠ-

ɧɨ ɩɪɟɧɟɛɪɟɱɶ.

Ɉɬɜɟɬ: 31,5·10

ɇ/ɦ

, 47 ɦ.

22. ɋɢɫɬɟɦɚ ɞɜɭɯ ɩɨɪɲɧɟɣ ɧɚɯɨɞɢɬɫɹ ɜ ɪɚɜɧɨɜɟɫɢɢ (ɪɢɫɭɧɨɤ). Ɉɩ-

ɪɟɞɟɥɢɬɶ ɪɚɡɧɢɰɭ ɩɨɤɚɡɚɧɢɣ ɩɶɟɡɨɦɟɬɪɨɜ

h, ɟɫɥɢ D/d = 3; ɇ = 2 ɦ;

= ȡ

= const.

Ɉɬɜɟɬ: 1,778 ɦ.

23. Ƚɪɭɧɬɨɜɵɟ ɜɨɞɵ, ɮɨɪɦɢɪɭɸɳɢɟ ɫɢɫɬɟɦɭ ɫ ɧɟɮɬɹɧɵɦ ɩɥɚɫɬɨɦ,

ɜɵɯɨɞɹɬ ɧɚ ɩɨɜɟɪɯɧɨɫɬɶ (ɪɢɫɭɧɨɤ). Ʉɚɤɨɜɚ ɞɨɥɠɧɚ ɛɵɬɶ ɩɥɨɬɧɨɫɬɶ ɝɥɢ-

ɧɢɫɬɨɝɨ ɪɚɫɬɜɨɪɚ, ɩɪɢɦɟɧɹɟɦɨɝɨ ɩɪɢ ɛɭɪɟɧɢɢ (

min

), ɱɬɨɛɵ ɧɟ ɛɵɥɨ ɮɨɧ-

ɬɚɧɢɪɨɜɚɧɢɹ ɧɟɮɬɢ ɩɪɢ ɜɫɤɪɵɬɢɢ ɩɥɚɫɬɚ? Ƚɥɭɛɢɧɚ ɫɤɜɚɠɢɧɵ

h = 2500

ɦ; ɪɚɫɫɬɨɹɧɢɟ ɦɟɠɞɭ ɭɪɨɜɧɟɦ ɜɵɯɨɞɚ ɩɨɞɡɟɦɧɵɯ ɜɨɞ ɧɚ ɩɨɜɟɪɯɧɨɫɬɶ ɢ

ɝɪɚɧɢɰɟɣ ɜɨɞɚ–ɧɟɮɬɶ

= 3200 ɦ; ɪɚɫɫɬɨɹɧɢɟ ɦɟɠɞɭ ɭɪɨɜɧɟɦ ɜɵɯɨɞɚ

ɝɪɭɧɬɨɜɵɯ ɜɨɞ ɧɚ ɩɨɜɟɪɯɧɨɫɬɶ ɢ ɭɫɬɶɟɦ ɫɤɜɚɠɢɧɵ

= 600 ɦ; ɩɥɨɬɧɨɫɬɶ

ɩɨɞɡɟɦɧɵɯ ɜɨɞ

= = 1100 ɤɝ/ɦ

; ɩɥɨɬɧɨɫɬɶ ɧɟɮɬɢ ȡ

= 850 ɤɝ/ɦ

Ɉɬɜɟɬ: 1347 ɤɝ/ɦ

24. ɐɢɥɢɧɞɪ ɞɢɚɦɟɬɪɨɦ d = 20 ɫɦ ɡɚɩɨɥɧɟɧ ɜɨɞɨɣ ɢ ɡɚɤɪɵɬ ɫɜɟɪɯɭ

ɛɟɡ ɡɚɡɨɪɚ ɩɥɚɜɚɸɳɢɦ ɩɨɪɲɧɟɦ, ɧɚ ɤɨɬɨɪɵɣ ɩɨɥɨɠɟɧ ɝɪɭɡ ɦɚɫɫɨɣ 5 ɤɝ.

ɇɚ ɤɚɤɭɸ ɜɵɫɨɬɭ ɩɨɞɧɢɦɟɬɫɹ ɜɨɞɚ ɜ ɩɶɟɡɨɦɟɬɪɟ, ɫɨɟɞɢɧɟɧɧɨɦ ɫ ɩɨɪɲ-

ɧɟɦ?

Ɉɬɜɟɬ: 0,159 ɦ.

25.Ɉɩɪɟɞɟɥɢɬɶ ɞɚɜɥɟɧɢɟ ɜɨɞɵ ɧɚ ɞɧɨ ɪɟɡɟɪɜɭɚɪɚ ɢ ɧɚ ɩɪɨɛɤɭ, ɡɚ-

ɤɪɵɜɚɸɳɭɸ ɨɬɜɟɪɫɬɢɟ ɜ ɧɚɤɥɨɧɧɨɣ ɫɬɟɧɤɟ ɪɟɡɟɪɜɭɚɪɚ. Ⱦɚɜɥɟɧɢɟ ɧɚ

ɫɜɨɛɨɞɧɭɸ ɩɨɜɟɪɯɧɨɫɬɶ ɠɢɞɤɨɫɬɢ

= 5 Ɇɉɚ; h = 2 ɦ; ɞɢɚɦɟɬɪ ɩɪɨɛɤɢ

d = 40 ɦɦ; h

= 1 ɦ.

Ɉɬɜɟɬ: 9836,7 ɇ.

2.3. Ɍɣɦɛ ɟɛɝɦɠɨɣɺ ɡɣɟɥɩɬɭɣ ɨɛ ɬɭɠɨɥɮ (ɪɦɩɬɥɮɹ ɣ ɥɫɣɝɩɦɣɨɠɤɨɮɹ)

Ɋɚɫɫɱɢɬɚɬɶ ɦɚɧɨɦɟɬɪɢɱɟɫɤɨɟ ɞɚɜɥɟɧɢɟ ɪ

ɢ ɫɢɥɭ ɞɚɜɥɟɧɢɹ, ɞɟɣ-

ɫɬɜɭɸɳɭɸ ɧɚ ɜɟɪɯɧɸɸ ɤɪɵɲɤɭ ɫɨɫɭɞɚ, ɩɨɥɧɨɫɬɶɸ ɡɚɩɨɥɧɟɧɧɨɝɨ ɜɨɞɨɣ

(ɪɢɫɭɧɨɤ), ɟɫɥɢ ɜɟɫ ɫɨɫɭɞɚ

G = 5·10

ɇ; ɞɢɚɦɟɬɪ ɫɨɫɭɞɚ D = 0,4 ɦ; S

–

ɩɥɨɳɚɞɶ ɫɟɱɟɧɢɹ ɜɟɪɯɧɟɣ ɤɪɵɲɤɢ; ɞɢɚɦɟɬɪ ɩɨɪɲɧɹ, ɞɟɣɫɬɜɭɸɳɟɝɨ ɧɚ

ɠɢɞɤɨɫɬɶ,

d = 0,2 ɦ; ɩɥɨɳɚɞɶ ɫɟɱɟɧɢɹ ɩɨɪɲɧɹ S

= (3,14·d

)/4.

Ɉɬɜɟɬ: 15,9·10

ɇ/ɦ

; 19,97·10

ɇ.

2. Ɉɩɪɟɞɟɥɢɬɶ ɫɢɥɭ ɞɚɜɥɟɧɢɹ ɧɚ ɜɟɪɬɢɤɚɥɶɧɭɸ ɫɬɟɧɤɭ A B C D ɫɨ-

ɫɭɞɚ, ɩɨɥɧɨɫɬɶɸ ɡɚɩɨɥɧɟɧɧɨɝɨ ɜɨɞɨɣ (ɪɢɫɭɧɨɤ), ɢ ɩɨɥɨɠɟɧɢɟ ɰɟɧɬɪɚ

ɞɚɜɥɟɧɢɹ, ɟɫɥɢ

L = 32 ɦ; l = 26 ɦ; h = 18 ɦ; ȡ = 103 ɤɝ/ɦ

; g = 10 ɦ/ɫ

Ɉɬɜɟɬ: 454·10

ɇ; 11,8 ɦ.

Ɉɩɪɟɞɟɥɢɬɶ ɫɢɥɵ ɞɚɜɥɟɧɢɹ ɠɢɞɤɨɫɬɢ ɧɚ ɫɬɟɧɤɢ ɢ ɨɫɧɨɜɚɧɢɟ ɨɬ-

ɤɪɵɬɨɝɨ ɫɨɫɭɞɚ, ɟɫɥɢ

l = 5 ɦ; b = 3 ɦ; ȡ = 1000 ɤɝ/ɦ

; h = 2 ɦ; Į = 60°;

g = 10 ɦ/ɫ

(ɪɢɫɭɧɨɤ).

Ɉɬɜɟɬ: 1,13·10

ɇ; 3·10

ɇ.

4. Ɉɩɪɟɞɟɥɢɬɶ ɫɢɥɵ ɞɚɜɥɟɧɢɹ ɧɚ ɛɨɤɨɜɵɟ ɩɨɜɟɪɯɧɨɫɬɢ ɪɟɡɟɪɜɭɚɪɚ,

ɡɚɩɨɥɧɟɧɧɨɝɨ ɛɟɧɡɢɧɨɦ (ɪɢɫɭɧɨɤ), ɢ ɤɨɨɪɞɢɧɚɬɵ ɰɟɧɬɪɨɜ ɞɚɜɥɟɧɢɹ, ɟɫ-

ɥɢ

Į = 60°; b = 1 ɦ; h = 4 ɦ; ȡ = 750 ɤɝ/ɦ

; g = 10 ɦ/ɫ

Ɉɬɜɟɬ: 1,6·10

ɇ; 2 ɦ.

5. Ɉɩɪɟɞɟɥɢɬɶ ɫɢɥɭ ɞɚɜɥɟɧɢɹ ɜɨɞɵ ɧɚ ɰɢɥɢɧɞɪɢɱɟɫɤɭɸ ɫɬɟɧɤɭ ɪɟ-

ɡɟɪɜɭɚɪɚ (ɪɢɫɭɧɨɤ), ɚ ɬɚɤɠɟ ɭɝɨɥ ɧɚɤɥɨɧɚ ɤ ɝɨɪɢɡɨɧɬɭ ɥɢɧɢɢ ɞɟɣɫɬɜɢɹ

ɷɬɨɣ ɫɢɥɵ ɚ, ɟɫɥɢ ɪɚɞɢɭɫ ɫɬɟɧɤɢ

R = 2 ɦ, ɲɢɪɢɧɚ ɫɬɟɧɤɢ ȼ = 3 ɦ, ɜɵɫɨɬɚ

ɭɪɨɜɧɹ ɜɨɞɵ ɜ ɬɪɭɛɤɟ ɩɶɟɡɨɦɟɬɪɚ, ɭɫɬɚɧɨɜɥɟɧɧɨɝɨ ɧɚ ɜɟɪɯɧɟɣ ɤɪɵɲɤɟ

ɪɟɡɟɪɜɭɚɪɚ,

h = 0,5 ɦ.

Ɉɬɜɟɬ: 151 ɤɇ; 54°8`.

6. Ɉɩɪɟɞɟɥɢɬɶ ɫɢɥɭ ɞɚɜɥɟɧɢɹ ɧɚ ɨɫɧɨɜɚɧɢɟ ɪɟɡɟɪɜɭɚɪɚ (ɪɢɫɭɧɨɤ), ɚ

ɬɚɤɠɟ ɫɢɥɭ, ɞɟɣɫɬɜɭɸɳɭɸ ɧɚ ɡɟɦɥɸ ɩɨɞ ɪɟɡɟɪɜɭɚɪɨɦ, ɟɫɥɢ

h = 3 ɦ; b = 3

ɦ;

ȡ = 103 ɤɝ/ɦ

; l

= 6 ɦ; Į = 60°;g = 10ɦ/ɫ

. Ɉɛɴɹɫɧɢɬɶ ɩɨɥɭɱɟɧɧɵɟ ɪɟ-

ɡɭɥɶɬɚɬɵ. ȼɟɫɨɦ ɪɟɡɟɪɜɭɚɪɚ ɦɨɠɧɨ ɩɪɟɧɟɛɪɟɱɶ.

Ɉɬɜɟɬ: 6,975·10

ɇ; 5,4·10

ɇ.

7. Ɉɩɪɟɞɟɥɢɬɶ ɫɢɥɭ F, ɧɟɨɛɯɨɞɢɦɭɸ ɞɥɹ ɭɞɟɪɠɚɧɢɹ ɜɟɪɬɢɤɚɥɶɧɨɝɨ

ɩɚɧɧɨ (ɫɬɟɧɤɢ) ɲɢɪɢɧɨɣ

b = 4 ɦ ɢ ɜɵɫɨɬɨɣ ɇ = 5,5 ɦ (ɪɢɫɭɧɨɤ) ɩɪɢ ɝɥɭ-

ɛɢɧɟ ɜɨɞɵ ɫɥɟɜɚ

= 5 ɦ, ɫɩɪɚɜɚ h

= 2 ɦ; ȡ = 1000 ɤɝ/ɦ

; g = 10ɦ/ɫ

Ɉɬɜɟɬ: 1,42·10

ɇ.

8. Ɍɪɭɛɨɩɪɨɜɨɞ ɞɢɚɦɟɬɪɨɦ d = 0,75 ɦ ɡɚɤɚɧɱɢɜɚɟɬɫɹ ɡɚɩɨɥɧɟɧɧɵɦ

ɧɟɮɬɶɸ (

ȡ = 860 ɤɝ/ɦ

) ɪɟɡɟɪɜɭɚɪɨɦ ɢ ɡɚɤɪɵɬ ɤɪɵɲɤɨɣ ɫ 12 ɛɨɥɬɚɦɢ (ɪɢ-

ɫɭɧɨɤ). ɋɜɨɛɨɞɧɚɹ ɩɨɜɟɪɯɧɨɫɬɶ ɜ ɪɟɡɟɪɜɭɚɪɟ ɧɚɯɨɞɢɬɫɹ ɧɚ ɪɚɫɫɬɨɹɧɢɢ

= 7 ɦ ɨɬ ɰɟɧɬɪɚ ɬɹɠɟɫɬɢ ɤɪɵɲɤɢ. ɇɚɩɪɹɠɟɧɢɟ ɧɚ ɪɚɡɪɵɜ ɫɬɚɥɢ ɛɨɥɬɨɜ

[

ı] = 7000 ɇ/ɫɦ

. Ɉɩɪɟɞɟɥɢɬɶ ɫɢɥɭ ɞɚɜɥɟɧɢɹ ɠɢɞɤɨɫɬɢ ɧɚ ɤɪɵɲɤɭ, ɝɥɭ-

ɛɢɧɭ ɰɟɧɬɪɚ ɞɚɜɥɟɧɢɹ ɢ ɞɢɚɦɟɬɪ ɛɨɥɬɨɜ, ɟɫɥɢ

D = d.

Ɉɬɜɟɬ: 26488 ɇ; 7,01 ɦ; 0,63 ɫɦ.

9. Ɉɩɪɟɞɟɥɢɬɶ ɫɢɥɭ ɫɭɦɦɚɪɧɨɝɨ ɞɚɜɥɟɧɢɹ ɜɨɞɵ ɧɚ ɩɥɨɫɤɢɣ ɳɢɬ,

ɩɟɪɟɤɪɵɜɚɸɳɢɣ ɤɚɧɚɥ, ɢ ɭɫɢɥɢɟ, ɤɨɬɨɪɨɟ ɧɟɨɛɯɨɞɢɦɨ ɩɪɢɥɨɠɢɬɶ ɞɥɹ

ɩɨɞɴɟɦɚ ɳɢɬɚ. ɒɢɪɢɧɚ ɤɚɧɚɥɚ

b = 1,8 ɦ, ɝɥɭɛɢɧɚ ɜɨɞɵ ɜ ɧɟɦ h = 2,2 ɦ.

ȼɟɫ ɳɢɬɚ

G = 15 ɤɇ. Ʉɨɷɮɮɢɰɢɟɧɬ ɬɪɟɧɢɹ ɳɢɬɚ ɩɨ ɨɩɨɪɚɦ f = 0,25 (ɪɢ-

ɫɭɧɨɤ).

Ɉɬɜɟɬ: 42,7 ɤɇ.

10. Ɉɩɪɟɞɟɥɢɬɶ ɪɟɡɭɥɶɬɢɪɭɸɳɭɸ ɫɢɥɭ ɞɚɜɥɟɧɢɹ ɧɚ ɩɥɨɫɤɭɸ ɩɨ-

ɜɟɪɯɧɨɫɬɶ Ⱥ ɢ ɩɨɥɨɠɟɧɢɟ ɬɨɱɤɢ ɟɟ ɩɪɢɥɨɠɟɧɢɹ (ɪɢɫɭɧɨɤ). ɉɨɤɚɡɚɧɢɟ

ɦɚɧɨɦɟɬɪɚ ɧɚ ɡɚɤɪɵɬɨɦ ɪɟɡɟɪɜɭɚɪɟ, ɡɚɩɨɥɧɟɧɧɨɦ ɜɨɞɨɣ,

= 5000 ɇ/ɦ

;

ɇ = 4 ɦ; D = 1 ɦ; ȡ = 103 ɤɝ/ɦ3; g = 10ɦ/ɫ

Ɉɬɜɟɬ: 35,325 ɇ; 4,015 ɦ.

11. ɉɨɤɚɡɚɧɢɟ ɦɚɧɨɦɟɬɪɚ M

= 5 ɇ/ɫɦ

, ɩɨɤɚɡɚɧɢɟ ɦɚɧɨɦɟɬɪɚ Ɇ

= 6 ɇ/ɫɦ

, ȡ = 1000 ɤɝ/ɦ

, g = 10ɦ/ɫ

. Ɉɩɪɟɞɟɥɢɬɶ ɩɨɡɢɰɢɸ ɫɜɨɛɨɞɧɨɣ

ɩɨɜɟɪɯɧɨɫɬɢ ɨɬ ɞɧɚ ɪɟɡɟɪɜɭɚɪɚ (ɪɢɫɭɧɨɤ).

Ɉɬɜɟɬ: 1 ɦ.

12. ɂɦɟɟɬɫɹ ɰɢɥɢɧɞɪɢɱɟɫɤɚɹ ɰɢɫɬɟɪɧɚ ɫ ɛɟɧɡɢɧɨɦ (ɪɢɫɭɧɨɤ). Ɇɚ-

ɧɨɦɟɬɪ ɩɨɤɚɡɵɜɚɟɬ ɢɡɛɵɬɨɱɧɨɟ ɞɚɜɥɟɧɢɟ ɩɚɪɨɜ ɧɚɞ ɫɜɨɛɨɞɧɨɣ ɩɨɜɟɪɯ-

ɧɨɫɬɶɸ. Ɉɩɪɟɞɟɥɢɬɶ ɫɢɥɭ ɞɚɜɥɟɧɢɹ ɧɚ ɩɨɜɟɪɯɧɨɫɬɶ

Ⱥȼ ɢ ɤɨɨɪɞɢɧɚɬɭ

ɰɟɧɬɪɚ ɞɚɜɥɟɧɢɹ, ɟɫɥɢ

D = 2,2 ɦ; ɇ = 2,4 ɦ; ȡ = 0,72·10

ɤɝ/ɦ

; ɪ

1,5·10

ɇ/ɦ

; g = 10ɦ/ɫ

Ɉɬɜɟɬ: 6,041·10

ɇ; 1,53 ɦ.

13.

ɋɬɚɥɶɧɨɣ ɩɨɥɭɫɮɟɪɢɱɟɫɤɢɣ ɪɟɡɟɪɜɭɚɪ ɪɚɞɢɭɫɨɦ R = 1 ɦ ɢ ɦɚɫ-

ɫɨɣ

m = 2550 ɤɝ, ɪɚɫɩɨɥɨɠɟɧɧɵɣ ɧɚ ɝɨɪɢɡɨɧɬɚɥɶɧɨɣ ɩɥɨɫɤɨɫɬɢ Ⱥ–Ⱥ ɱɟ-

ɪɟɡ ɩɶɟɡɨɦɟɬɪ ɡɚɩɨɥɧɹɟɬɫɹ ɜɨɞɨɣ (ɪɢɫɭɧɨɤ). ɉɪɢ ɤɚɤɨɣ ɜɵɫɨɬɟ

ɯ ɩɪɨ-

ɢɡɨɣɞɟɬ ɨɬɪɵɜ ɪɟɡɟɪɜɭɚɪɚ ɨɬ ɩɥɨɫɤɨɫɬɢ Ⱥ–Ⱥ?

Ɉɬɜɟɬ: 0,875 ɦ.

14. Ɋɟɡɟɪɜɭɚɪ ɧɚɩɨɥɧɟɧ ɛɟɧɡɢɧɨɦ. Ɉɩɪɟɞɟɥɢɬɶ ɫɢɥɵ ɞɚɜɥɟɧɢɹ, ɞɟɣ-

ɫɬɜɭɸɳɢɟ ɧɚ ɨɫɧɨɜɚɧɢɟ, ɛɨɤɨɜɵɟ ɩɨɜɟɪɯɧɨɫɬɢ ɢ ɤɪɵɲɭ, ɟɫɥɢ

D = 5 ɦ;

h = 1,5 ɦ; ɇ = 4 ɦ; ȡ

= 0,8·10

ɤɝ/ɦ

; g = 9,81 ɦ/ɫ

(ɪɢɫɭɧɨɤ).

Ɉɬɜɟɬ: 8,47·10

ɇ; 7,15·10

ɇ; 1,54·10

ɇ.

15. ɉɪɨɫɬɟɣɲɢɣ ɚɪɟɨɦɟɬɪ (ɩɪɢɛɨɪ ɞɥɹ ɨɩɪɟɞɟɥɟɧɢɹ ɩɥɨɬɧɨɫɬɢ

ɠɢɞɤɨɫɬɢ), ɜɵɩɨɥɧɟɧɧɵɣ ɢɡ ɤɪɭɝɥɨɝɨ ɤɚɪɚɧɞɚɲɚ ɞɢɚɦɟɬɪɨɦ

d = 8 ɦɦ ɢ

ɩɪɢɤɪɟɩɥɟɧɧɨɝɨ ɤ ɟɝɨ ɨɫɧɨɜɚɧɢɸ ɦɟɬɚɥɥɢɱɟɫɤɨɝɨ ɲɚɪɢɤɚ ɞɢɚɦɟɬɪɨɦ

= 5 ɦɦ, ɢɦɟɟɬ ɜɟɫ G = 0,006 ɇ. Ɉɩɪɟɞɟɥɢɬɶ ɩɥɨɬɧɨɫɬɶ ɠɢɞɤɨɫɬɢ ȡ, ɟɫ-

ɥɢ ɚɪɟɨɦɟɬɪ ɰɢɥɢɧɞɪɢɱɟɫɤɨɣ ɱɚɫɬɶɸ ɩɨɝɪɭɠɚɟɬɫɹ ɜ ɧɟɟ ɧɚ ɝɥɭɛɢɧɭ

h = 1,5 ɫɦ.

Ɉɬɜɟɬ: 747 ɤɝ/ɦ

2.4. Ɋɦɛɝɛɨɣɠ ɭɠɦɛ. ɂɛɥɩɨ Ȼɫɰɣɧɠɟɛ

ȼ ɨɛɵɱɧɵɯ ɭɫɥɨɜɢɹɯ ɱɟɥɨɜɟɤ ɩɨɞɧɢɦɚɟɬ ɛɟɡ ɬɪɭɞɚ ɫɬɚɥɶɧɭɸ ɝɢ-

ɪɸ ɦɚɫɫɨɣ

= 30 ɤɝ. ɋɬɚɥɶɧɭɸ ɝɢɪɸ ɤɚɤɨɣ ɦɚɫɫɵ ɱɟɥɨɜɟɤ ɦɨɠɟɬ ɩɨɞ-

ɧɹɬɶ ɛɟɡ ɬɪɭɞɚ ɩɨɞ ɜɨɞɨɣ, ɟɫɥɢ

= 10

ɤɝ/ɦ

; ȡ

ɫɬ

= 7,8 10

ɤɝ/ɦ

Ɉɬɜɟɬ: 33,8 ɤɝ.

2. ɉɪɹɦɨɭɝɨɥɶɧɚɹ ɛɚɪɠɚ ɪɚɡɦɟɪɨɦ l ɯ b ɯ H = 60 ɯ 8 ɯ Ɂ,5 ɦ (ɪɢɫɭ-

ɧɨɤ) ɧɚɩɨɥɧɟɧɚ ɩɟɫɤɨɦ ɨɬɧɨɫɢɬɟɥɶɧɨɣ ɩɥɨɬɧɨɫɬɶɸ

= 2,0 ɤɝ/ɦ

ɢ ɜɟɫɨɦ

G = 1440·10

ɇ. Ɉɩɪɟɞɟɥɢɬɶ ɨɫɚɞɤɭ ɛɚɪɠɢ h; ɨɛɴɟɦ ɩɟɫɤɚ, ɤɨɬɨɪɵɣ ɧɟ-

ɨɛɯɨɞɢɦɨ ɨɬɝɪɭɡɢɬɶ ɫ ɛɚɪɠɢ, ɱɬɨɛɵ ɨɫɚɞɤɚ ɧɟ ɩɪɟɜɵɲɚɥɚ

h = 1,2 ɦ

(

= 1000 ɤɝ/ɦ

Ɉɬɜɟɬ: 3 ɦ, 288 ɦ