Grundlagen & Ingenieurwesen
Pumpenbau (Teil1)
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.
Expansion Valves Selection
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.
Wasserrohr gegen Feuerrohrkessel
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.
Wasserschlag (Teil1)
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.
Kühlformeln und Berechnungen
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.
Der Geschwindigkeitskoeffizient (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.
Pipe Insulation Guideline
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.
Kältemittelleitungen – Teil2
In diesem Beitrag werden wir unser umfassendes Training zur Größe des Kältemittelsrohrs fortsetzen. Wir werden alle wichtigen Aspekte dieses Prozesses abdecken, einschließlich der Bestimmung der Rohrgröße, des Druckabfalls und anderer Faktoren. Wir werden auch Themen wie die Größengrößenlinienlinien, die äquivalente Länge für Kältemittellinien und die Bestimmung der äquivalenten Länge diskutieren. Mit diesem Training haben Sie in jeder Situation das Wissen und das Selbstvertrauen in die Größe des Kältemittelsrohrs genau und korrekt.
Standards & Compliance
HVAC-Kanaldesign: Reibungsverlust von Kanalanschlüssen
Complete guide to HVAC duct fittings friction loss using Carrier standards covering loss coefficients, pressure drop calculations, and system optimization for efficient air distribution design.
HLK -Kanaldesign: Dämpfer, Dämpfer und Spulen -Reibungsverlust
Complete guide to HVAC dampers, attenuators, and coils friction loss using SMACNA standards covering pressure drop calculations, component selection, and system optimization for efficient air distribution design.
HLK -Kanaldesign: Kanalrunde bis rechteckig Äquivalent
Complete guide to HVAC round-to-rectangular duct equivalency using ASHRAE standards covering conversion formulas, performance considerations, and system optimization for space-constrained installations.
HLK -Kanal Design: Verlust von Kanalliktion
Complete guide to HVAC duct friction loss calculations using ASHRAE standards covering friction charts, pressure drop analysis, and system optimization for efficient air distribution design.
HLK -Kanalkonstruktion: Klassifizierung der Kanaldruckdruck
Complete guide to HVAC duct pressure classification using SMACNA standards covering pressure class selection, construction requirements, and testing protocols for safe and efficient ductwork systems.
HLK -Kanal Design: Kommerzielle Küchenkanalgröße
Complete guide to commercial kitchen duct sizing using ASHRAE and NFPA standards covering exhaust hood design, grease management, fire safety, and make-up air systems for food service operations.
HVAC Duct Design: Duct Sizing by Velocity & Noise Criteria (NC)
Complete guide to HVAC duct sizing using velocity and noise criteria with ASHRAE and CIBSE standards covering acoustic design, velocity limits, and noise control for sensitive applications.
HVAC-Kanaldesign: Kanaldimensionierung nach der Methode gleicher Reibung
Complete guide to HVAC duct sizing using the equal friction method with SMACNA and ASHRAE standards covering calculation procedures, friction rate selection, and system optimization for effective air distribution design.
HVAC-Kanaldesign: SMACNA-Empfehlungen zur Kanalgröße
Complete guide to HVAC duct sizing using SMACNA recommendations covering equal friction, velocity, and static regain methods with design calculations and system optimization for effective air distribution.
Digitale Tools und Ressourcen
Psychrometric Programming Functions
ibrary of psychrometric functions to calculate thermodynamic properties of air for Python, C, C#, Fortran, JavaScript and VBA/Excel
Carrier Hap-Software
Carrier’s Hourly Analysis Program is two powerful tools in one package – versatile features for designing HVAC systems for commercial buildings AND powerful energy analysis capabilities for comparing energy consumption and operating costs of design alternatives.
Trace 700-Software
Mit TRACE 700 können Gebäudeplaner die Gebäude-, System- und Gerätekonstruktionen auf der Grundlage der Energienutzung und der Lebenszykluskosten optimieren. Die Trane-Software für TRACE 700 erleichtert die Analyse der energetischen und wirtschaftlichen Auswirkungen praktisch jeder Kühlanlagenkonfiguration, indem sie es Benutzern ermöglicht, eine Vielzahl von Variablen zu manipulieren und ein Profil ihres spezifischen Gebäudes zu erstellen.
Download Evap-Cond 5.0: Das ultimative Wärmetauscher-Simulationsinstrument für HLK-Ingenieure
Egal, ob Sie einen neuen Wärmetauscher entwerfen, ein vorhandenes System optimieren oder alternative Kältemittel erforschen, Evap-Cond bietet die detaillierten Analysefunktionen, die für fundierte Entscheidungen erforderlich sind. Ich ermutige alle HLK -Ingenieure und Forscher, dieses leistungsstarke Simulationstool zu untersuchen und aus erster Hand zu erleben, wie es Ihren Ansatz zum Design des Wärmetauschers verändern kann.
Wärmeübertragungslehrbuch herunterladen
The book is meant for juniors, seniors, and first-year graduate students. And to those who choose to learn the subject on their own, and to practicing engineers who use it as a reference. Whether one studies alone or with a class, learning means posing, then answering, one’s own questions.