Re: [TRNSYS-users] type 16

2011/6/13 <trnsys-users-request@cae.wisc.edu>

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Today's Topics:

1. Question(solar radiation) (=?EUC-KR?B?udrB2L/4?=)
2. TRNSYS Active Layer Flowrate (Devin Rohan)
3. type 700 efficiencies (Pablo D?az N??ez)

---------- 已转发邮件 ----------
From: 박준원<flowrime@naver.com>
To: <trnsys-users@cae.wisc.edu>
Date: Mon, 13 Jun 2011 20:33:02 +0900
Subject: [TRNSYS-users] Question(solar radiation)

Hi!!

I am a Korean student, i'm having some trouble with solar radiation.

I want to get "Indoor solar radiation" using Type56b(Multi zone)...

But. I dont know output value about solar radiation..

I think, Ntype 73 (zone output) is zone solar radiation, is it right??

However i dont know unit of that..

So.. My question are..

1. is Ntype 73 zone solar radiation? so what's the unit??

2. if not Ntype 73, How can i get the indoor solar radiation?

thanks to all,

---------- 已转发邮件 ----------
From: Devin Rohan <dmrohan@gmail.com>
To: trnsys-users@cae.wisc.edu
Date: Sat, 11 Jun 2011 20:10:01 -0400
Subject: [TRNSYS-users] TRNSYS Active Layer Flowrate
The Type 56 manual suggests that the specific mass flow rate be greater than 13 kg/h-m^2. Say I wanted to convert this to mass flow rate in kg/s and the fluid was flowing through a 3/8" (or 9.525 mm) inside diameter pipe. Here's what I'm doing...

A_pipe= (pi*D^2)/4 = (pi*.009525^2)/4= 7.1256 E-5 m^2

13 kg/h-m^2 x (7.1256 E-5 m^2) x (h / 3600 sec) = 2.573 E-7 kg/s

This seems like an awfully low mass flow rate, since what I've seen in literature for floor heating applications is around .05 kg/s. Am I missing something here?

--
Devin M. Rohan
drohan@purdue.edu

---------- 已转发邮件 ----------
From: "Pablo Díaz Núñez" <p.diazn87@gmail.com>
To: trnsys-users@cae.wisc.edu
Date: Mon, 13 Jun 2011 18:16:34 +0200
Subject: [TRNSYS-users] type 700 efficiencies

Dear trnsys users,

I am simulating and studying the behaviour of a central heating system of a residential building with gas boilers. For the boiler I'm using type 700, where combustion and boiler efficiencies are inputs. I need these values as a function of the intlet water temperature and the part load ratio for the model to work and I don't find this data in any boiler catalog. Only partial data like the boiler efficiency at rated power.

If somebody had any cataloge with this data I would be very thankful. Or maybe somebody knows any manufacturer who could provide me.

I know it's not a doubt or question about trnsys itself, but I'm a bit desperate.

Thanks in advance!

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