Fondamenti e ingegneria
Costruzione della pompa (Parte 1)
In 1689 the physicist Denis Papin invented the centrifugal pump and today this kind of pump is the most used around the world. The centrifugal pump is built on a simple principle: Liquid is led to the impeller hub and by means of the centrifugal force it is flung towards the periphery of the impellers. The construction is fairly inexpensive, robust and simple and its high speed makes it possible to connect the pump directly to an asynchronous motor.
Selezione delle valvole di espansione
The expansion valve regulates the amount of compressed liquid refrigerant moving into the evaporator. It removes pressure from the liquid refrigerant to allow expansion or change of state from a liquid to a gas in the evaporator. In order to properly select Expansion Valves one should pay attention to the items that we mention in this post.
Tubo d'acqua contro caldaie a tubo di fuoco
Water tube boilers and fire tube boilers are two different types of steam boilers that are commonly used in industrial and commercial applications. Both types of boilers use a system of tubes to generate steam, but they differ in the way that the tubes are arranged and the way that the hot gases from the burner pass through the tubes.
Colpo d'ariete (parte 1)
Under unfavorable circumstances, damage due to water hammer may occur in pipelines measuring more than one hundred meters and conveying only several tenths of a liter per second. But even very short, unsupported pipelines in pumping stations can be damaged by resonant vibrations if they are not properly anchored. By contrast, the phenomenon is not very common in building services systems, e.g. in heating and drinking water supply pipelines, which typically are short in length and have a small cross-section.
Formule e calcoli di refrigerazione
These formulas are commonly used in the field of refrigeration and air conditioning to calculate various performance parameters of a refrigeration system such as compression work, compression power, coefficient of performance, net refrigeration effect, capacity, compressor displacement, heat of compression, volumetric efficiency, and compression ratio. These formulas are based on the thermodynamics principles and are generally used to evaluate the performance of the refrigeration system and to optimize its design.
Il coefficiente di velocità (CV)
Cv, or coefficient of velocity, is a measure of the flow capacity of a valve. It represents the number of gallons per minute (GPM) of water at 60°F that will flow through a valve with a one-inch opening at a pressure drop of one pound per square inch (PSI). Cv can be calculated using various formulas, such as the one based on water at 60F and one that takes into account the specific gravity of the fluid. Cv is a theoretical value and it may vary depending on the actual conditions of the valve. When selecting a valve for a specific application, it is important to consider the Cv in relation to the flow rate and pressure drop requirements of the system, as well as other factors such as ease of maintenance, cost, and safety.
Linee guida per l'isolamento dei tubi
Pipe insulation is crucial for maintaining energy efficiency, temperature control, condensation control, noise reduction, and safety. ASHRAE provides specific thickness recommendations for different pipe sizes and temperature ranges in its standard 90.1. When selecting pipe insulation based on ASHRAE standards, it’s important to consider the temperature, pipe size, environmental considerations, fire resistance, and energy efficiency.
Tubazioni del refrigerante – parte 2
In questo post continueremo la nostra formazione completa su come dimensionare le tubazioni del refrigerante. Tratteremo tutti gli aspetti importanti di questo processo, inclusa la determinazione della dimensione del tubo, della caduta di pressione e di altri fattori. Discuteremo anche argomenti come il dimensionamento delle linee del refrigerante, la lunghezza equivalente delle linee del refrigerante e come determinare la lunghezza equivalente. Con questa formazione avrai la conoscenza e la sicurezza necessarie per dimensionare le tubazioni del refrigerante in modo accurato e corretto in qualsiasi situazione.
Standard e conformità
Design di ventilazione HVAC: ventilazione dell'aria di scarico per velocità e ACH
Complete guide to HVAC exhaust air ventilation design using ASHRAE, CIBSE, and Carrier standards covering rate calculations, ACH requirements, and specialized applications for effective contaminant removal and energy efficiency.
Design di ventilazione HVAC: ventilazione dell'aria esterna per velocità e ACH
Complete guide to HVAC outdoor air ventilation design using ASHRAE, CIBSE, and Carrier standards covering rate calculations, ACH requirements, and building-specific applications for optimal indoor air quality.
Progettazione della ventilazione HVAC: qualità dell'aria interna e contaminanti dell'aria
Complete guide to HVAC indoor air quality and air contaminant management using ASHRAE, CIBSE standards covering contaminant identification, control strategies, and advanced treatment technologies for healthy indoor environments.
Design di ventilazione HVAC: distanza minima di separazione dell'aria
Complete guide to HVAC air intake minimum separation distances using ASHRAE 62.1 standards covering contamination source requirements, measurement methods, and compliance strategies for optimal outdoor air quality protection.
Design di ventilazione HVAC: classificazioni aeree
Complete guide to HVAC air classifications using ASHRAE 62.1 and CIBSE standards covering air quality categories, contamination levels, filtration requirements, and ventilation strategies for optimal indoor environmental control.
Design di ventilazione HVAC: schema generale ed equazioni
Complete guide to HVAC ventilation design using ASHRAE 62.1 standards covering calculation procedures, system schematics, and modern ventilation strategies for optimal indoor air quality and energy efficiency.
Stima del carico HVAC: fattore di fouling
Complete guide to fouling factors in HVAC load estimation using Carrier water conditioning standards for accurate heat transfer equipment sizing and comprehensive water quality management strategies.
Stima del carico HVAC: fattore di diversità
Complete guide to diversity factors in HVAC load estimation using CIBSE and Carrier standards for accurate system sizing that reflects realistic building operation patterns and prevents equipment oversizing.
Stima del carico HVAC: condizioni di progettazione interna e requisiti di sistema per tipo di costruzione
Complete guide to indoor design conditions for HVAC load estimation covering temperature, humidity, air quality, and specialized requirements for residential, commercial, industrial, healthcare, and specialty building applications using ASHRAE, CIBSE, and Carrier standards.
Stima del carico HVAC: guadagno e perdita di infiltrazione di calore
Complete guide to infiltration in HVAC load estimation using ASHRAE, CIBSE, and Carrier standards for accurate assessment of uncontrolled air exchange and its impact on heating and cooling loads.
Strumenti e risorse digitali
Libri di clinica per il condizionamento dell'aria Trane
These clinics are comprehensive and detailed courses used to educate on the fundamentals heating, ventilating, and air conditioning (HVAC). Each clinic includes a student workbook, with corresponding quiz questions/problems.
Libri TDP di sviluppo tecnico (TDP)
Technical Development Programs (TDP) are modules of technical training on HVAC theory, system design, equipment selection and application topics. They are targeted at engineers and designers who wish to develop their knowledge in this field to effectively design, specify, sell or apply HVAC equipment in commercial applications.
Rhvac – Residential Hvac Loads And Duct Sizes
Rhvac can calculate peak heating and cooling loads (both block and room by room) for residential buildings and some light commercial applications in accordance with ACCA Manual J, D, and S. Rhvac include a complete ACCA Manual D duct sizing capability and a complete Manual S equipment selection.
Colori contenitore refrigerante
Questa linea guida è destinata alla guida del settore, inclusi produttori, ingegneri, installatori, appaltatori e utenti.
Refrig - Carichi della scatola di refrigerazione
Refrig quickly calculates the maximum refrigeration load in btu’s per 24 hour period for all types of refrigeration applications. Refrig has provision for all kinds of loads including: roofs, walls, partitions, floors, products, containers, infiltration, lights, equipment, people, defrost, compressor run-time, and more.
Software 3E Plus
NAIMA’s FREE 3E Plus® software program makes it easy to calculate the appropriate insulation thickness necessary for any application. To ensure accuracy, the program has customizable inputs for every aspect of your job—and offers default values if your exact numbers aren’t available.
Diagramma PH dei refrigeranti
The pressure-enthalpy diagram (log P/h diagram) is a very useful tool for refrigerant technicians, engineers and researchers. Since it’s not always possible to have all of these diagrams together, we decided to give you this complete pack.
Aspettativa di vita delle attrezzature HVACR
Below you can see ASHRAE chart of HVAC Equipment Life Expectancy. The chart includes a list of median life expectancy for the following types of equipment: