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Study of the ITO sublayer influence on the tubular carbon nanostructures formation
The study of the formation of catalytic centers and the growth of CNT-based TCN was carried out on the Ni (10 nm)/ITO (100 nm)/Si (370 μm) structure. Shown that the temperature at the stage of heating and growth has a significant impact on the parameters of the formed TCN. Promising for instrumental use, the TCN were formed at a temperature of 750 °C, a heating time of 20 minutes, an activation time of 3 minutes. The effect of plasma ions at the stages of «activation» and growth was also demonstrated.
Journal Article
Testing and Balancing HVAC Air and Water Systems
Thoroughly revised, this book provides the reader with an understanding of the principles and practices of testing and balancing (TAB) heating, ventilating, and air conditioning (HVAC) air and water systems. For the novice and the experienced testing and balancing technician, it is a field reference book of procedures, equations, and information tables.
Divided into five parts, Part I has general and specific balancing procedures for constant air volume systems, variable air volume systems, return air systems, and fans and fan performance. Part II covers testing and balancing fume hood systems and cleanrooms, commissioning HVAC systems, centrifugal pumps and pump performance, analog and digital controls and water balancing procedures using flow meters, system components, and temperatures. Part III covers fans, pumps, air distribution, water distribution, motors, electrical, fluid flow, psychrometrics, refrigeration, and instrument usage and care. Part IV includes equations and tables. New to this edition, Part V has information and additional test and balance procedures and graphics for chapters 1-7 and 13-14. TAB Data and Test forms are in the new addendum as well.
Provides the readers with revised information about the principles and practices of testing and balancing (TAB) heating
Represents a field reference guide for both the novice and experienced testing and balancing technician
Includes a new section with information and additional test and balance procedures and graphics
Thoroughly revised, this book provides the reader with an understanding of the principles and practices of testing and balancing (TAB) heating, ventilating, and air conditioning (HVAC) air and water systems. For the novice and the experienced testing and balancing technician, it is a field reference book of procedures, equations, and information tables.
Divided into five parts, Part I has general and specific balancing procedures for constant air volume systems, variable air volume systems, return air systems, and fans and fan performance. Part II covers testing and balancing fume hood systems and cleanrooms, commissioning HVAC systems, centrifugal pumps and pump performance, analog and digital controls and water balancing procedures using flow meters, system components, and temperatures. Part III covers fans, pumps, air distribution, water distribution, motors, electrical, fluid flow, psychrometrics, refrigeration, and instrument usage and care. Part IV includes equations and tables. New to this edition, Part V has information and additional test and balance procedures and graphics for chapters 1-7 and 13-14. TAB Data and Test forms are in the new addendum as well.
• Provides the readers with revised information about the principles and practices of testing and balancing (TAB) heating
• Represents a field reference guide for both the novice and experienced testing and balancing technician
• Includes a new section with information and additional test and balance procedures and graphics
eBook
Система напольного отопления на основе аморфной металличесκой ленты
The article contains an overview of innovative heating technology for rooms - a floor heating system based on tape amorphous metal heaters developed by Advanced Heating Technologies. In the article are listed the basic properties and parameters of the product, carried out calculations, with the results of which is made a comparative analysis of the development and system with a traditional cable floor, which is demonstrating the advantages of technology, in particular in the energy efficiency sphere. Were revealed the main advantages of the new method, peculiarities of using these heaters, and its limitations.
Journal Article
A Review on Techno-Economic Assessment of Solar Water Heating Systems in the Middle East
Currently, the economy of Middle Eastern countries relies heavily on fossil fuel sources. The direct and indirect adverse consequences of fossil fuel utilization for power generation enforce the region’s countries to raise the share of renewable energy. In this context, various incentive policies have been developed to encourage the residential and industrial sectors to support a portion of energy needs through renewable energy resources. In this case, a solar water heating system (SWHS) as an application of solar thermal technology provides some of the heat energy requirements for domestic hot water (DHW) and space heating, supported conventionally by electricity or natural gas, or even other fossil fuels. This paper reviews the feasibility of the SWHS in the Middle East region from technical and economical standpoints and investigates some of the progress, challenges, and barriers toward this market. The pay-back times and CO2 emission reduction under different incentive frameworks and configurations of each system have been assessed in this context. Furthermore, the advantages and weaknesses of the SWHS in several countries have been reported. Finally, various guidelines have been proposed to enhance the development of this technology.
Journal Article
At your best as an HVAC/R tech : your playbook for building a successful career and launching a thriving small business as an HVAC/R technician
\"The only series of step-by-step guides to succeeding in the skilled trades and achieving the American dream. At Your Best as an HVAC/R Tech is your playbook for learning if a career as an electrician is right for you, progressing from pre-apprentice to journeyman to master technician, and launching your own small business. Learn: What does a career as an HVAC/R tech look like? Why should you consider becoming an HVAC/R tech? How do you become a successful craftsman as an HVAC/R tech? How much can you make as an HVAC/R tech? What are your career options once you become an HVAC/R tech? How long does it take to be successful at each stage in a HVAC/R tech's career? How and where do you find work as an HVAC/R tech? What does it take to strike out on your own? What does it take to launch and build a successful small business? At Your Best is the only step-by-step handbook to finding if a career in the trades is right for you, educating yourself and earning the proper certifications, establishing yourself as an excellent apprentice and journeyman in the industry, and moving on to start your own small business in the trades. At each step of the way, your At Your Best playbook and its companion, www.AtYourBest.com, provide the information, recommendations, outside resources, and concrete actions needed for taking the next successful step in You, Inc. Whether you are beginning your first career, changing careers, or ready to move up and start your own business as a carpenter, plumber, HVAC/R tech, or other tradesman, this is the book that will tell you how. There currently over 6.5 million unfilled jobs in the skilled trades in the US. Despite being well-paying and secure, these jobs remain open because enough qualified candidates with the skills, attitude, and experience required do not exist. Moreover, plenty of opportunity exists for established tradespeople to start their own business, but they have no guidance. The At Your Best Playbooks series and www.AtYourBest.com change that.\" -- ONIX annotation.
Book
Low and Ultra-Low Temperature District Heating Equipped by Heat Pumps—An Analysis of the Best Operative Conditions for a Swiss Case Study
The manuscript analyses the management of low and ultra-low-temperature district heating systems (DHS) coupled with centralised and decentralised heat pumps. Operative conditions are defined in order to satisfy the heating needs without overloading the electric grid. The results are achieved by dynamic simulations, based on a real DHS located in southern Switzerland. At the building level, the heating needs are estimated considering real data and simultaneous energy simulations. Two DHS configurations, alternatives to the existing one, are simulated and suitable parameters for the management of the DHS are selected. The global performance of the two DHS is evaluated by KPIs also including the flexibility and the impact on the electric peak due to heat pumps. The achieved results are discussed providing suggestions for the stakeholders involved in DHS management for an optimal matching of the electric grid and thermal networks towards a reduction of the peak power. The rule-based control strategies defined allow the expected electric peak shaving and load levelling, conversely, the yearly energy consumptions are lightly increased and have to be further investigated. The outcomes demonstrate a global better performance of the ultra-low temperature DHS in terms of response to the applied control strategies and of energy savings.
Journal Article