First of all, I would like to express my praises and gratitude to the Merciful Allah who makes me able to complete this thesis successfully. Mostofa Hossain, Head of the Department of Mechanical Engineering, Sonargaon University and Bachelor of Science in Mechanical Engineering, Dhaka, Bangladesh for giving permission to use all relevant laboratories and all kinds of advice. I would like to express my sincere gratitude and thanks to the Vice Chancellor of Sonargaon University, Bachelor of Science in Mechanical Engineering for the financial support during the research period.
Ice-based cold thermal energy storage (CTES) systems have attracted much attention over the past decades. Compared to conventional refrigeration and air conditioning systems without cold storage of thermal energy, the implementation of CTES will increase environmental standards and the overall efficiency of energy systems as it contributes to the gradual removal of synthetic refrigerants and reduces peak loads on electricity networks . Our focus is to create a different ventilation system instead of a cooler for a low temperature in the working area of the industry (Textiles).
For the application of HVAC systems for cold thermal energy storage in industry and construction, it is necessary to have the right design tools to predict their performance with sufficient accuracy. We will make ice cream through an ice plant. The aim of this thesis is to expand the knowledge in the field of ice-based Cool Thermal Energy Storage (CTES) systems, by contributing to the development and wider use of those systems.
CHAPTER-01
Introduction
In residential and industrial areas, we follow time-of-day tariffs for electricity consumption per unit, the costs of which vary throughout the day per hour. In which, with the help of a compressor and coolant, we will produce ice in that period when the cost of electricity per unit is lower and then use this ice to exchange heat from the air and bring heat into the room. In addition to the fact that HVAC systems make human life healthier and more productive, various products could also be produced faster, better and more economically in a properly controlled environment.
Almost every residential, institutional, commercial and industrial building in the developed countries of the world has a year-round controlled environment.
Objective
CHAPTER-02 Literature Review
- HVAC System
- Ice Bank (Ice Cell) System
- Uses of thermal storage
- Ventilation System
- Types of Air conditioning system
- Split Air Conditioner System
- Packaged Heating & Air Conditioning System
- Types of Packaged Units
- Central Air Conditioning Plants
- Deferent type of Ventilation Systems
- Mechanical ventilation System
- Natural ventilation System
- Exhaust Ventilation Systems
- Supply Ventilation Systems
- Balanced Ventilation Systems
Air conditioning: Air conditioning is controlled in the process of indoor air temperature and movement, humidity and temperature. The conditioner works to remove excess moisture from the air or add it as needed. Thermal storage allows you to produce cooling when it's more convenient or less expensive and use it for air conditioning or process cooling when you need it.
Air conditioning systems can be designed that use Ice-Cell thermal storage and cost little or no more than conventional chiller-only systems. How to use: Ice-Cell is mainly used to store refrigeration capacity for air conditioning. Most central air conditioning systems for large buildings use electrically driven liquid coolers. This is the uncontrolled flow of air into a room through accidental or unintentional holes and cracks in the building envelope.
It should be noted that the initial cost of this type of air conditioning unit is significantly higher than that of a window unit and it requires professional installation. Central air conditioning installations require a special room in which the compressor, condenser, thermostatic expansion valve and evaporator are located. These systems function in the same way as any other air conditioning unit, except they are much larger and have a higher capacity.
These huge machines pump out cooled air, which is channeled through ducts throughout the building, resulting in quiet, yet highly efficient air conditioning in every room. To operate and maintain central air conditioning systems, you need good operators, technicians and engineers. The cooling coil is fixed in the air handling unit, which also houses a large fan.
But in the summer season, electricity for operating fans can be saved by using natural ventilation. Wind-driven ventilation relies on the force of the prevailing wind to pull and push air through the closed space as well as through breaks in the building's climate screen. The technique was generally abandoned in larger American buildings in the late 20th century as the use of air conditioning became more widespread.
Because air is brought into the house in separate places, outdoor air may need to be mixed with indoor air before delivery to avoid cold drafts in winter. Also, like supply ventilation systems, outdoor air must be mixed with indoor air before delivery to avoid cold air drafts in winter.
CHAPTER-03
Working Procedure
To evaluate the performance of a static, indirect, external melt, ice-on-coil cooled thermal energy storage system for different design arrangements and under different operating conditions. In the first phase, a mathematical model has been developed that includes components of an ice bank system and their interconnections. Due to the high complexity of the system and numerous design and operating parameters that affect its performance a computer application.
Input of design and operating parameters is enabled through drop-down menus while results are presented through figures, diagrams and figures. The exception we made here is that, to make cold water here, instead of using a chiller, I used the ice plant. At first we tried to create an ice plant, which contained water mixed with salt and in the middle was an ice storage container.
We use a chilled water pump and a condenser water pump to send this baby water to the floor.
Multiple Inverter Compressors
Scroll Compressor
Gas gets trapped in crescent-shaped pockets between the two rollers, and constant spinning moves it steadily toward the center, decreasing volume and creating compression. The discharge port design determines the amount of internal compression, similar to that of a screw compressor. However, there are practical limits to the maximum amount of compression, mainly due to the size, shape, wall thickness and strength of the curls, and the size and geometry of the exhaust port.
CHAPTER-04 Result and Discussion
Problem
The air-conditioned room, located in a well-ventilated basement, measures 37 m in length, 3 m in height and 30 m in width. From the following information, calculate the sensible, latent and total heat gains in the room, the sensible heat factor of the room. In order to calculate the required cooling power, it is necessary to know the losses in the return air ducts.
Project Cooling load calculation
Result
Electricity Bill calculation
Conclusion
A static, indirect, cold heat storage system with external ice melting on the coil was considered. A refrigerator with ice storage gives you greater operational flexibility while reducing space cooling costs. Just keep in mind that every project is unique and the potential savings from ice storage is highly dependent on your electricity rate.
