Hot Water Heating Systems - Online Design Application
This tool can be used to design hot water heating systems.
How to Use
- Make a sketch of the system - something similar to the default sketch below. Custom drawings can be linked to the application - any global (http://..) or local (file://..) url should work
- Tag the sections and add them to the hierarchical application structure below (after reset)
- Add input data - power, preliminary dimensions, lengths, minor coefficients, temperature drop, and so on for each section
- Modify the piping dimensions to achieve reasonable values for velocities and pressure drops
- Select pump - the pump pressure must be larger than the highest accumulated pressure loss in the system
- Balance the system - start with the endpoints - add balancing pressures until the pump pressures in the end points equals zero. Add balancing pressure in other sections if required.
- Save the data file to your computer/network
- dimensions, minor loss coefficients, viscosity, density, roughness, specific heat
Important! - this calculation is for the flow OR the return piping system. If the flow and return piping systems are more or less identical - as in the default example above - the total pressure loss through the system for the pump to handle is 2 times the calculated (as indicated in the graph).
If the flow and the return system are different - like with a reversed return system - then the flow and the return systems must be calculated separately. The total pressure loss for the pump to handle will be the summarized pressure loss for the flow and return system.
- Note! - Since only half of the system is calculated - use only half the minor loss coefficients specified by suppliers in connection points between flow and return systems - typical in heating elements and/or in the central heater and pump.
- When selecting balancing valves - keep the flow but double the calculated balancing pressure drop for systems with identical flow and return piping - and summarize if the piping is different.
Related Topics
• Heating
Heating systems - capacity and design of boilers, pipelines, heat exchangers, expansion systems and more.
Related Documents
ANSI Schedule 40 Steel Pipes - Dimensions
Internal and external diameters, areas, weights, volumes and number of threads for ANSI schedule 40 steel pipes.
ANSI Schedule 80 Steel Pipes - Dimensions
Internal and external diameters, areas, weights, volumes and number of threads for schedule 80 steel pipes.
ASME/ANSI B36.10/19 - Carbon, Alloy and Stainless Steel Pipes - Dimensions
Pipe sizes, inside and outside diameters, wall thickness, schedules, moment of inertia, transverse area, weight of pipe filled with water - U.S. Customary Units.
ASME/ANSI B36.10/19 - Carbon, Alloy and Stainless Steel Pipes - Dimensions - Metric Units
Pipe sizes, inside and outside diameters, wall thickness, schedules, weight and weight of pipe filled with water - Metric Units.
ASTM B88 - Seamless Copper Water Tubes - Dimensions
Water and gas copper tubes according ASTM B88 - type K, L and M - imperial units.
ASTM F876 - PEX Tube - Dimensions
Dimensions of PEX tubes.
BS 2871 Copper Tubes Table X, Y and Z - Working Pressures vs. Size
Working pressures of metric sized copper tubes according the BS (British Standard) 2871.
Copper Tubes - Heat Carrying Capacities
Hot water heat carrying capacities in copper tubes type L.
Design of Hot Water Heating Systems
Calculate gravity and forced circulating hot water heating systems.
District Heating - Heat Capacity vs. Temperature
Water temperature and heating capacity.
Domestic Hot Water Service Systems - Design Procedures
Design procedures for domestic hot water service systems.
EN 10255 - Non-alloy Steel Tubes for Welding and Threading - Dimensions
Dimensions and weights of steel tubes according BS EN 10255.
Equivalent Length Method - Minor Pressure Loss in Piping Systems
Calculate minor pressure loss in piping systems with the Equivalent Pipe Length Method.
Ethylene Glycol Heat-Transfer Fluid Properties
Properties like freezing point, viscosity, specific gravity and specific heat of ethylene glycol based heat-transfer fluids, or brines.
Fittings and Minor Pressure Loss
Minor pressure loss with fittings in piping heating systems.
Gravity Heating System
The density difference between hot and cold water is the circulating force in a self circulating gravity heating system.
Heat Emission from Radiators and Heating Panels
The heat emission from a radiator or a heating panel depends on the temperature difference between the radiator and the surrounding air.
Heating System Flow Rates
Calculate flow rates in heating systems.
Heating Systems - Safety Valves Size vs. Boiler Power
Safety valves with boilers ranging 275 to 1500 kW.
Heating Up Applications - Energy Required and Heat Transfer Rates
Energy required to heat up a substance.
Hot Water Circulation System - Return Pipes
Hot water can be circulated through a return pipe if it's instantly required at the fixtures.
Hot Water Expansion Tanks - Sizing
Required hot water expansion volume in open, closed and diaphragm tanks.
Hot Water Heating System - Design Procedure
Hot water heating system design procedure with heat loss, boiler rating, heater units and more.
Hot Water Heating System Temperatures vs. Outdoor Temperatures
Hot water heating temperatures adapts to outdoor temperatures.
Hot Water Heating Systems - Flow Temperatures vs. Outside Temperatures
Seasonal effects on hot-water heating systems flow temperatures.
Hot Water Heating Systems - Online Design Application, Imperial Units
Online design tool for hot water heating systems.
Hot Water Heating Systems - Pressure Loss in Steel Pipes
Pressure loss nomogram for hot water steel pipes.
Hot Water Systems - Equivalent Length vs. Fittings Resistance
Equivalent length of fittings like bends, returns, tees and valves in hot water heating systems - equivalent length in feet and meter.
Hot-Water Heating Systems - Classification
Hot-water heating systems can be classified by temperature and pressure.
NPS - 'Nominal Pipe Size' and DN - 'Diametre Nominal'
The size of pipes, fittings, flanges and valves are often given in inches as NPS - Nominal Pipe Size, or in metric units as DN - 'Diametre Nominal'.
Pipes - Nominal Wall Thickness
Nominal wall thickness of seamless and welded carbon and alloy steel pipes
Piping - Recommended Insulation Thickness
Recommended insulation thickness for heating systems like hot water and low, medium or high pressure steam systems.
Piping Materials - Temperature Expansion Coefficients
Temperature expansion coefficients for materials used in pipes and tubes like aluminum, carbon steel, cast iron, PVC, HDPE and more.
Pressfit Piping - Dimensions
Dimension of pressfit pipes.
Propylene Glycol based Heat-Transfer Fluids
Freezing points of propylene glycol based heat-transfer fluids suitable for the food processing industry.
Snow Melting Systems
Sizing snow melting systems - water and antifreeze.
Steam Heating Systems - Design
An introduction to the basic design of steam heating systems.
Water Systems - Maximum Flow Velocities
Water velocities in pipes and tubes should not exceed certain limits.