Đồ án tốt nghiệp - Research air conditioning system and design teaching model

HO CHI MINH CITY UNIVERSITY OF TECHNOLOGY AND EDUCATION
FACULTY OF INTERNATIONAL EDUCATION

GRADUATION PROJECT

RESEARCH AIR CONDITIONING SYSTEM AND
DESIGN TEACHING MODEL

NGUYEN CONG KHANH
Student ID: 19145191
NGUYEN MINH TRIET
Student ID: 19145052

Major: AUTOMOTIVE ENGINEERING TECHNOLOGY
Supervisor: MS. VU DINH HUAN.
Ho Chi Minh City, January 2024

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THE SOCIALIST REPUBLIC OF VIETNAM

Independence – Freedom– Happiness


EVALUATION SHEET OF
DEFENSE COMMITTEE MEMBER
Student name: Nguyen Cong Khanh

Student ID: 19145191

Student name: Nguyen Minh Triet

Student ID: 19145052

Student name: .................................................................

Student ID: .............................

Major: Automotive Engineering Technology
Project title: Research air conditioning system and design teaching model
Name of Defense Committee Member:
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EVALUATION
1. Content and workload of the project
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2. Strengths:
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3. Weaknesses:
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teinhart1, 0)
lcd.setCursor(16, 1)
lcd.print(*C)

pressureValue1 = analogRead(pressureInput1)
float V = pressureValue1 * 5 / 1024
pressureValue1 = ((pressureValue1 - pressureZero) * pressuretransducermaxPSI) /
(pressureMax - pressureZero)
Serial.print(pressureValue1, 1)
Serial.println(psi)
lcd.setCursor(0, 2)
lcd.print(Pressure: )
lcd.print(pressureValue1, 1)
lcd.setCursor(17, 2)
lcd.print(psi)
(sensorread)
(1000)
}

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Measuring temperature and pressure in evaporator
#define coolantsensorDivider 1700
#define coolantsensorPin1 A0
#define NUMSAMPLES1 5
#include LiquidCrystal_I2C.h
#include Wire.h
LiquidCrystal_I2C lcd(0x27, 20, 4)
const float steinconstA = 0.00494838599138165000000
const float steinconstB = -0.00059485520380309200000
const float steinconstC = 0.00000664029106104212000
int samples[NUMSAMPLES1]
const int pressureInput1 = A2
const int pressureZero = 0.5 * 1024 / 4.95
const int pressureMax = 4.5 * 1024 / 4.95
const int pressuretransducermaxPSI = 300
const int baudRate = 9600
const int sensorread = 100
float pressureValue1 = 0
void setup() {
Serial.begin(baudRate)
lcd.init()
lcd.backlight()
}
void loop() {
uint8_t i
float average1
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for (i = 0 i NUMSAMPLES1 i++) {
samples[i] = analogRead(coolantsensorPin1)
(100)
}
average1 = 0
for (i = 0 i NUMSAMPLES1 i++) {
average1 += samples[i]
}
average1 /= NUMSAMPLES1
average1 = (coolantsensorDivider * average1) / (1023 - average1)

float steinhart1
steinhart1 = log(average1)
steinhart1 = pow(steinhart1, 3)
steinhart1 *= steinconstC
steinhart1 += (steinconstB * (log(average1)))
steinhart1 += steinconstA
steinhart1 = 1.0 / steinhart1
steinhart1 -= 273.15

Serial.print(Temperature = )
Serial.print(steinhart1, 1)
Serial.println( *C)
Serial.print(Resitance =)
Serial.print(average1, 1)
Serial.println(Ohm)
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lcd.setCursor(0, 0)
lcd.print(-EVAPORATOR-)
lcd.setCursor(0, 1)
lcd.print(Temperature: )
lcd.print(steinhart1, 0)
lcd.setCursor(16, 1)
lcd.print(*C)

pressureValue1 = analogRead(pressureInput1)
float V = pressureValue1 * 5 / 1024
pressureValue1 = ((pressureValue1 - pressureZero) * pressuretransducermaxPSI) /
(pressureMax - pressureZero)
Serial.print(pressureValue1, 1)
Serial.println(psi)
lcd.setCursor(0, 2)
lcd.print(Pressure: )
lcd.print(pressureValue1, 1)
lcd.setCursor(17, 2)
lcd.print(psi)
(sensorread)
(1000)
}

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