Sherif,
Using a differential controller will work but Trnsys18 also has some just-plain-thermostat models (Type106 or Type166) that might be easier to implement. You'll need two connections. One connection might come from an equation or a combination of an equation and a forcing function that results in the temperature that you want the boiler to supply. The equation might be:
isSummer = AND(GT(TIME,3624),LT(TIME,6552))The other connection will be the temperature that is being monitored to decide whether the boiler should be on or off. Again you'll probably need some equations here so that the decision to turn on the boiler can come in summer when conditions are such that you want to run the chiller or in winter when you want heat.
kind regards,
David
checked Thanks, I have another question I used a differential controller to the boiler type 700 and need temperature out of it in the range between 80-90 in summer(cooling season) to supply absorption chiller and need temperature in winter(heating season) in the range of 30-45. I linked the upper input Temp.(Th) to outlet of the boiler, linked the lower input Temp.(TL) to the return flow from the tank to the boiler. for monitoring Temp. (Tin),upper dead band(dt) and lower dead band(dt) I don't really know how to link or what value should be. could anyone help, please?, Thanks in advance.
On Tue, Jul 6, 2021 at 8:32 PM David BRADLEY <d.bradley@tess-inc.com> wrote:
Sherif,
There are a number of examples in the .\Trnsys18\Examples\HVACTemplates\ folder that will give you some ideas about how to implement control of HVAC systems. Have a look at the 10-Examples.pdf documentation in parallel with those examples. I don't think that any of them have a radiant floor in them but the principals are the same.
You might also have a look at the example:
.\Trnsys18\Examples\Feedback Control\SunSpace - Floor heating PID controller.tpf
Its controls are possibly more complicated than the ones in your case but it will show how to do the system-level connections between Type56's active layers and the HVAC system.
kind regards,
David
On 07/06/2021 10:20, SHERIF SAIED via TRNSYS-users wrote:
Hello everyone,
I need help in some controls on radiant cooling and heating system model like type 165 to control either boiler for heating system or control building temperatures, also need to control on different components for the cooling system to work uniformly according to season if summer cooling system work and if winter will work the heating system and so on . I have problems in PPD and PMV for building through all year. if anyone would help or have an example model for how I can set these controllers in two systems?Regards,
--
Sherif Saied.Tel: (+2)01004419468 / (+2)01124348957
_______________________________________________ TRNSYS-users mailing list TRNSYS-users@lists.onebuilding.org http://lists.onebuilding.org/listinfo.cgi/trnsys-users-onebuilding.org-- *************************** David BRADLEY Principal Thermal Energy Systems Specialists, LLC 3 North Pinckney Street - suite 202 Madison, WI 53703 USA P:+1.608.274.2577 d.bradley@tess-inc.com http://www.tess-inc.com http://www.trnsys.com
--
Sherif Saied.Tel: (+2)01004419468 / (+2)01124348957
_______________________________________________ TRNSYS-users mailing list TRNSYS-users@lists.onebuilding.org http://lists.onebuilding.org/listinfo.cgi/trnsys-users-onebuilding.org
-- *************************** David BRADLEY Principal Thermal Energy Systems Specialists, LLC 3 North Pinckney Street - suite 202 Madison, WI 53703 USA P:+1.608.274.2577 d.bradley@tess-inc.com http://www.tess-inc.com http://www.trnsys.com