ABSTRACT

This project developed a Virtual Reality (VR) application to introduce the basics of HVAC systems for domestic air conditioning. Targeting students from the Refrigeration and Air Conditioning program, the project aims to provide a practical experience in identifying refrigerant types, technical equipment, and procedures for inspection and hose installation. The application was developed using Unity 2022, Blender, Adobe Photoshop and Illustrator, and PICO 4 as the VR platform. This innovation offers a more interactive and safer learning experience while reducing physical costs. Features like equipment interaction, exploration of indoor and outdoor units, and periodic inspections enrich the user experience. With successful implementation, this application is expected to improve technical learning methods and provide a more engaging and effective virtual learning experience.

Introduction

This project aims to develop an innovative Virtual Reality (VR) application that focuses on the fundamentals of HVAC (Heating, Ventilation, and Air Conditioning) systems, with a particular emphasis on domestic air conditioning units. Designed specifically for students enrolled in the Refrigeration and Air Conditioning program, this application serves as an interactive educational tool that enhances traditional learning methods. By leveraging the immersive capabilities of VR technology, students are given the opportunity to explore and engage with complex technical processes related to air conditioning systems in a highly interactive, lifelike, and practical setting. The goal is to provide a risk-free environment where learners can gain hands-on experience with various components of HVAC systems, such as installation, maintenance, and troubleshooting, all while avoiding the physical hazards and equipment damage associated with real-world training. Through this virtual platform, students are able to develop a deeper understanding of HVAC principles, improve their technical skills, and better prepare themselves for future practical applications in the field. This project also aims to modernize the educational approach in technical and vocational programs by integrating advanced VR technologies to complement and enhance traditional teaching methods.

Project Background

Domestic air conditioning systems represent a fundamental subject within the Refrigeration and Air Conditioning course, as they encompass essential knowledge on how to regulate indoor climates effectively and ensure proper air quality. Understanding the technical processes, components, and systems that underpin domestic air conditioning is critical for students pursuing careers in the HVAC (Heating, Ventilation, and Air Conditioning) industry. With rapid advancements in technology, traditional hands-on learning has expanded into more innovative, simulation-based methodologies such as Virtual Reality (VR). These methods provide students with an opportunity to learn and practice technical skills in a controlled and immersive virtual environment, where they can safely explore the operation, maintenance, and inspection of air conditioning systems without the risks involved in real-world scenarios.

This project originally commenced as a preliminary study during the Final Year Project (PSM) 1 & 2, under the title Development of Virtual Reality for Periodic Inspection of Domestic Air Conditioning Systems. During this phase, the groundwork for integrating VR technology into HVAC education was laid, with a focus on simulating the periodic inspection and upkeep of domestic air conditioning systems. As part of the continuous improvement and expansion of the original project, it underwent further refinement during the Industrial Training placement at the Centre for Virtual Learning (CVL) at Universiti Tun Hussein Onn Malaysia (UTHM). The refinement process spanned over 10 months, during which the VR application evolved into HVAC VR v1.2.5. This version of the project included significant updates and enhancements, incorporating more interactive features, user-friendly interfaces, and improved learning modules, allowing students to perform more complex tasks, such as identifying refrigerant types, using diagnostic tools, and following proper installation and safety procedures. This evolution of the project reflects the commitment to leveraging VR technology as a modern teaching tool that enriches students’ learning experiences in the rapidly advancing field of HVAC systems.

Project Objectives

• To apply VR technology in learning the basics of HVAC systems for domestic air conditioning.

• To enhance students’ understanding of refrigerant types, equipment used, and components in air conditioning systems.

• To provide a virtual hands-on experience for hose installation and periodic inspection of air conditioning systems.

Innovation Information

The innovation introduced through the HVAC VR application lies in its integration of Virtual Reality (VR) technology to create an immersive and realistic simulation environment where students can interact with HVAC equipment without the need for physical machinery. This approach significantly enhances practical learning by allowing students to perform crucial tasks such as identifying different refrigerant types, operating measuring tools, and following detailed installation procedures, all within a virtual space. This not only reduces the risk of damaging costly equipment but also mitigates physical hazards associated with real-life HVAC training. The latest version, HVAC VR v1.2.5, is specifically designed to focus on domestic air conditioning units, providing five comprehensive activities that users can explore to better understand system components and operations. These activities are tailored to offer a hands-on experience, allowing users to practice and refine their skills in system diagnostics, maintenance, and installation processes. The version numbering reflects the application’s development, where "1" indicates a major release, "2" denotes two significant user interface changes, and ".5" represents minor bug fixes and performance improvements. The inclusion of this VR-based approach in technical and vocational education, particularly in areas like HVAC, is invaluable, as it offers a safe, interactive, and engaging learning experience that mimics real-world scenarios, ensuring students are well-prepared for future practical applications.

Activities in HVAC VR v1.5.2

Novelty

The uniqueness of this application lies in the use of VR technology for simulating a domestic air conditioning system, including interactive features such as matching refrigerants, arranging tools, and performing hose installation and periodic inspection in a realistic 3D environment. This project allows students to explore and learn in a virtual environment without the additional cost of physical materials.

VR Application Development

• Step 1: Initial Research – Conducted literature reviews and gained an understanding of HVAC components and equipment.
  
• Step 2: 3D Model Design – Used Blender to design 3D models of air conditioning units, equipment, and hoses.
  
• Step 3: Development in Unity – Integrated the 3D models into the Unity engine and configured user interaction using PICO 4 VR.
  
  
  
• Step 4: Testing and Refinement – Tested the application for compatibility and fixed issues such as technical bugs or interaction problems.
  
• Step 5: Documentation and Completion – Finalized the project by adding short videos, audio, and additional information.
  

Problems Encountered: Several technical issues arose during the integration of interactive elements in Unity and the VR device, especially in terms of graphical performance and VR equipment compatibility. Solutions included adjusting graphical settings and debugging through Unity Profiler.

Expectations

The development of the HVAC VR application is anticipated to significantly enhance the educational experience of students specializing in the Refrigeration and Air Conditioning field. By integrating Virtual Reality technology into the curriculum, students can engage in immersive, interactive learning environments that simulate real-world HVAC scenarios. This approach provides a more practical and hands-on learning experience without the associated risks of working directly with live equipment, such as accidental damage or safety hazards. Furthermore, the use of VR technology is expected to lower the costs traditionally associated with physical training equipment and materials, making it a more accessible and efficient solution for institutions. Through repeated practice in a risk-free environment, students can build their confidence, improve their technical skills, and gain a deeper understanding of HVAC systems—particularly domestic air conditioning units—thereby becoming better prepared for real-world applications. In essence, this application offers the potential to revolutionize how students learn, providing an innovative, cost-effective, and impactful method of technical education.

Conclusion

The HVAC VR application represents a forward-thinking innovation that redefines how students in technical and vocational education learn about domestic air conditioning systems. By offering a fully immersive and interactive platform, the VR application allows students to practice complex technical tasks such as system diagnostics, refrigerant identification, and equipment installation with greater ease and accuracy. This technology fosters a deeper level of engagement by providing users with a realistic environment to apply theoretical knowledge in a practical context. Additionally, the use of VR technology eliminates the risks typically associated with hands-on HVAC training, such as accidental damage to expensive equipment or potential safety hazards, making the learning process safer and more efficient. Despite the technical challenges faced during its development, the application has been thoroughly tested and optimized to deliver a seamless user experience. With these improvements, the HVAC VR application is now fully prepared to be integrated into HVAC training programs, offering a modernized approach to education that not only enhances student learning but also equips them with the practical skills necessary for success in the HVAC industry.

Reflection

The development process of this application presented various challenges, particularly in terms of technical and integration issues between VR software and Unity. However, this experience provided valuable lessons on the importance of debugging and adjusting settings to ensure the project runs smoothly. This application also demonstrates that VR technology can take learning to the next level with more interactivity and realism.

HVAC VR 1.2.5 refers to a specific version of a Virtual Reality (VR) application designed for HVAC (Heating, Ventilation, and Air Conditioning) systems. Here’s a more detailed breakdown of what it typically entails:

1. HVAC (Heating, Ventilation, and Air Conditioning):
HVAC systems are crucial in controlling indoor climate by regulating heating, ventilation, and air conditioning. The study or simulation of these systems in a virtual environment helps users understand complex components and mechanics involved in managing air quality, temperature, and energy efficiency in buildings.

2. VR (Virtual Reality):
VR allows users to immerse themselves in a virtual environment, where they can interact with simulated HVAC equipment, explore system designs, and perform troubleshooting tasks. In this context, HVAC VR provides a 3D, interactive environment for hands-on experience without the need for physical equipment.

3. Version 1.2.5:
The version number represents a specific update of the HVAC VR application. Here's the breakdown:

• 1.x.x: Major release indicating a stable, fully functional product with key features.
• x.2.x: Minor update introducing additional features or optimizations.
• x.x.5: Patch or bug fix update addressing minor issues or performance improvements.

4. Possible Features in HVAC VR 1.2.5:
This version may include:

• Interactive HVAC system simulations, visualizing components like compressors and condensers.
• System diagnostics for practicing maintenance or troubleshooting in a risk-free environment.
• Learning and training modules for educational purposes.
• Enhanced user interface or controls for better navigation in the VR environment.
• Bug fixes and performance improvements for smoother operation.

5. Educational and Professional Use:
HVAC VR is highly beneficial for training in technical and vocational education (TVET) programs. It allows users to simulate HVAC operations and repairs, practice tasks like refrigerant charging, and gain hands-on experience in a virtual environment before engaging with real-world equipment.

In summary, HVAC VR 1.2.5 likely serves as a virtual reality tool for teaching and training users on HVAC systems, providing an immersive, interactive environment to safely learn system functions, troubleshoot issues, and perform maintenance efficiently.

Download HVAC VR 1.2.5 apk file

CLICK HERE

How to download?

How to control the VR controller [PICO 4] ?

"Welcome to HVAC VR! Please use your Pico VR headset to explore and interact with the air conditioning systems. Follow the instructions carefully, and enjoy a safe, hands-on learning experience! We apologize for any shortcomings, as the HVAC VR application will be continuously improved over time."

I would like to express my utmost gratitude to the lecturers of the Faculty of Technical and Vocational Education, especially from the Creative Multimedia Program and the Refrigeration and Air Conditioning Program, for the guidance and knowledge shared throughout my studies. Their support and mentorship have been a crucial foundation in the development of this project. A heartfelt thanks also goes to the CVL UTHM for providing the opportunity to continue the VR development project on the topic of air conditioning. This opportunity has been invaluable in expanding my skills in VR technology and has provided a meaningful experience in combining creative and technical elements. Thank you to everyone involved for the invaluable assistance and support.