| Pump and
Plumbing Sizing for Solar Water/Space Heating Systems |
| Pump and
Plumbing Sizing for Solar Water or Space Heating System
Details on
solar pump/pipe sizing... |
 This
page covers the details of sizing the pump and the plumbing for a solar
space or water heating system so that the system efficiently transfers heat
from the collector to the storage tank without being excessively large.
Details on
solar pump/pipe sizing... |
| How to
Determine Collector Flow Rates |
 This
page takes you through how to determine flow rate for your collector, and
what the tradeoffs are ... |
| HVAC |
| Pipe
Flow Calculations
http://www.pipeflowcalculations.com
|
 Nice
set of calculators for pressure drop, airflow calculations, ... |
| Free Calc -- a variety of HVAC
calculators
http://www.freecalc.com/
Air duct
pressure drop calculator...
Pipe pressure
drop calculator... |
 Some
nicely done and generally easy to use calculators for water pipe and air
duct pressure losses, channel flow, fan laws, ...
|
Air Duct Friction Loss Calculator
From The Engineering Toolbox
www.engineeringtoolbox.com/...
|
 A
simple calculator for calculating the pressure losses in air ducts.
Useful for sizing ducts and fans. |
| Air Friction chart for flex ducts
http://www.hartandcooley.com/flex/air_friction_chart.pdf
|
An easy to use chart to look up
friction losses for flex ducts. I find this one simple chart answers most
of my duct loss questions -- it even has a correction for bends at the
bottom. |
Flex Duct Loses Due to Compression
and Sags...
Static Pressure Losses in
6”, 8”, and 10” Non-Metallic Flexible Duct... |
Flex ducting is subject to extra
losses compared to rigid metal ducts when it has sags between supports and
when it is not fully stretched out. These extra losses can be
quite larger.
This paper measures extra losses for flex ducting with sags and with
compressed ducts.
|
|
Stack Effect Ventilation Calculator |
Estimates airflow for thermal
stacks |
| Friction loss in round or
rectangular ducts
www.engineeringtoolbox.com/ ...
Note: The Engineering Toolbox site
has a lot of useful stuff, but also has some very scummy popup windows -- so
beware. |
A very simple air duct pressure
loss calculator. The duct calculator at the link just above is will handle
a wider variety of conditions, but is more complex to use. |
|
Temperature Drop Calculator for Air Ducts...
|
This handy calculator estimates the temperature drop in an insulated duct based on inside and outside temperatures, duct flow, duct size, and insulation level.
Note that the heat loss that goes with this temperature drop is about: (flow in cfm)(Temp drop in F)(1.08) BTU/hr
|
| Air Density Calculator
http://www.denysschen.com/catalogue/density.asp
|
Calculates air density for the
temperature and altitude you input. |
Reynolds Number
Re
Calculator...
|
 A
nice and flexible calculator for Reynodls number -- accepts a wide variety
of units and flow conditions.
The fluid viscosity inputs that are needed can be looked up on the
Engineering Toolbox website. |
Borst Engineering and Construction
Calculators
Many Calculators... |
Borst Engineering has a whole raft of calculators -- HVAC, solar position,
shading, and incident heat, water wheels, pipe sizing, ... |
| Pipe Flow |
| Copper Pipe Pressure Drop
http://www.engineeringtoolbox.com
|
Handy pressure drop table for
copper pipe. Note: 1 psi = 2.3 ft of head
Other pressure drop tools on this site:
Engineering Toolbox -- Pipe Flow |
| Pipe Pressure Drop Online
Calculator
http://www.pressure-drop.com/
|
 Nice
online pressure drop calculator. Handles a wide variety of situations.
Also figures loss for bends, orifices, nozzles, ... |
| Pipe flow and Duct Flow Calculators
Mike Rocchetti
http://www.connel.com/freeware/index.shtml
|
Calculators for pressure loss in
pipes and ducts, steam tables, and a Psychrometric Calculator |
| Hydronic
Heaters -- Baseboard, ... |
| SlantFin Hydronic Baseboard
Radiator Output
Baseboard output at low temps... |
 SlantFin
manual on their hydronic baseboard units showing output at lower temps that
might be typical of what you would get on efficient solar heating systems. |
