Nghiên cứu tính toán tiêu thụ điện cho máy lạnh theo giá trị non tải tích hợp IPLV

i/NGHIEN CQU TINH TOAN TIEU THU DIEN CHO

MAY LANH THEO GIA TRI NON TAI TICH HOP-IPLV

Pham Van LiTomg

ABSTRACT

In the Builings, The system of Heat,

ventilation and air-conditioning

(HVAC) is highest electric consumtion.

To have the good HVAC, the designer

have to know howr to calculation

electric consumtion of Chiller and

choice the Chiller have the lowest

electric consumtion.

Th.S Pham Van LiTomg

Vien Khoa hoc va ky thuat moi tnldng

Tradng Dai hoc Xay diTng

Di dong: 0912.151.466

Email: luonganhhapham(i)yahoacom

T

ieu thu dien hang nam eua he

thdng Dieu hda khdng khi (DHKK)

Nha gaTI sin bay Ndi Bii l i tren 6

trieu kWh/nim,Thip ddi Vincom l i

tren 8 trieu kWh/nam, Bdi vay trong edng

tie thiet ke he thdng DHKK cdng suit Idn

can die biet chu y de'n mue tieu tiet kiem

ning lupng,

Thdng thudng khi tinh toi n tieu thu

dien nang, ngudi ta thudng sU dung cdng

suit dien cua may lanh d che dp toan tai,

nhung thue te van hanh thi mi y lanh ehi

chay d che dp nay ri t it m i chu yeu l i d che

dp non tii , Bdi vay, viee dUa ra he sd tinh

toi n tieu thu dien khi van hinh mi y lanh

d che dp non ti i l i ri't cin thiet, Tinh toi n

lupng dien tieu thu cua mi y lanh vdi chi sd

non tai tich hop-IPLV:

Dien tieu thu (kWh) = IPLVx RTx Sd gid

chay may,

Trong do: IPLV l i chi sd non ti i tieh hop;

RT l i don vj cdng suit cua mi y lanh, 1

RT=3,516kW= 12000 Btu/h,

600

^ 500

c 400 CD

' ? 300

jE 200

100

0

36.4 28 19.7 11.4 3.1

Nhiet dp ngoai, "'C

Hinh 1, So lieu khi hau va mifc dp chay may lanh trang binh

Bing 1, He sd a, b, e, d cho nhdm 4, [5],

PI

n l

T

PI

n n

1. Chi so IPLV duoc tinh toan d cac

nUdc tien tien tren The giori

Ddi vdi cie nude thude he thdng Anh￾My, tieu chuan thiet ke dupe dinh hudng

theo cie nghien eUu cua ASHRAE- Hdi sudi

i m , cap lanh v i dieu hda khdng khi My v i

ARI- Vien nghien eUu ky thui t lanh v i dieu

hda khdng khi My,

Theo ARI Standard 550/590, thi mUc dd

hieu qu i cua mi y lanh khdng chi the hien

qua gi i trj tieu thu dien- kW/RT d 100%

edng suit- day tii , m i dupe the hien qua

gia trj chay non tai tich hpp (IPLV):

IPLV= l/(a/A-Fb/B-Fc/C-Fd/D), kW/RT

Trong do: A= kW/RT d 100% tii ,

B=kW/RTd75%ti i

C=kW/RTd50%tii,

D=kW/RTd25%ti i

Cie he sd a, b, c, v i d l i thdi lupng van

hanh d eic mUe 100%, 75%, 50%, v i 25%

edng suit lanh trong eic cdng trinh thdng

dung theo sd lieu khi hi u trung binh cua

My (a=0,01, b=0,42, c=0,45, d=0,12),

Theo ARI Standard 550/590, thdi gian

van hinh cua he thdng

dieu ho i khdng khi trong

eic to i nh i chia ra 4

nhdm:

-Nhdm 1:

7 ngiy/tuin,

>-18°C,

-Nhdm 2:

7 ngiy/tuin,

>12,8°C,

-Nhdm 3:

5 ngiy/tuin ,

>-18''C,

-Nhom 4: 12h/ngiy 5

-5.3 -14

24h/ngay,

nhiet dd

24h/ngay,

nhiet dp

12h/ngiy,

nhiet dd

dMy,[5)

He so

a

b

c

d

%Tai

100

75

50

25

IPLV

NUdc giai nhiet di

vao, =C.

29,4

24,2

18,8

N/A

Nhiet dp Ichong

khi.'C

35

28

19

N/A

1

0 018/A-I-0.501 /B-l-0,481 /C-(-0,0/D

Ti trong, %

1,8

50,1

48.1

0

48nSfI1S!V 01.2011