[TRNSYS-users] WEIRD phenomena

Subject: [TRNSYS-users] WEIRD phenomena

Date: Wed, 13 Jul 2011 09:57:18 +0200

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I control OP(window opening factor) in order to make indoor CO2% lower than 0.001476 kg/kg (900 ppm) based on indoor CO2%. I used 2 simple methods:

1) OP=(LT(0.001476, CO2%))*1, i.e. if CO2%>0.001476, OP=1 windows will open completely;
2) I defined SCHEDULE 001: about every 1 or 2 hours, OP=1 during 15 mins, 6 cycles.

BUT the two methods' results are very weird. to 1): OP is from 0 to 1 then to 0, there are 6 cycles during 24 h, 1 open/close cycle about only 6 mins, but FLTOZ: escaping air flow mass about 3000kg in all, CO2% is indeed lower than 900 ppm; Please see the ATTACHED 1st and 2nd, 3rd is the Online-plotter. FLTOZ can be seen from the *.out file 4th Attached.

to 2): SCHEDULE 001 is from 0 to 1, after 15 mins, from 1 to 0, there are also 6 cycles during 24 h, 1 open/close cycle about 15 mins, ALTHOUGH cycle time is bigger than 1): 6 mins, FLTOZ: escaping air flow mass about only 1550kg in all (weird), CO2% is higher than 900 ppm sometimes (weird); Please see the ATTACHED 5th and 6th, 7th is the Online-plotter. FLTOZ can be seen from the *.out file 8th Attached. SCHEDULE 001 can be found in TRNBUILD file.

I can't understand why 2)'s opening time is bigger than 1) and its open type is complete open during 15 mins (like a rectangle), but FLTOZ (escaping air flow mass about only 1550kg in all), CO2% is higher than 900 ppm sometimes , however, 1)'s open type is from 0 to 1 then to 0 only during 6 mins like a triangle, but FLTOZ (escaping air flow mass about 3000kg in all), CO2% is indeed lower than 900 ppm?

Please give me some advices! I think the problem may be TRNSYS and TRNFlow compatible reason.

Many thanks in advance!

Br.

wang

2011/7/7 <trnsys-users-request@cae.wisc.edu>

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Today's Topics:

1. Type 101-CLOSE error (Baboo Gowreesunker)
2. type 15-2 weather file (Muhammad Farooq)

---------- 已转发邮件 ----------
From: Baboo Gowreesunker <Baboo.Gowreesunker@brunel.ac.uk>
To: "trnsys-users@cae.wisc.edu" <trnsys-users@cae.wisc.edu>
Date: Thu, 7 Jul 2011 10:32:40 +0100
Subject: [TRNSYS-users] Type 101-CLOSE error

Hi all

I’m running type 101 on a windows 7, 64 bit machine.

Everytime I run the simulation, it runs for a few time steps, and then I obtain the following error:

Forrtl: severe (28): CLOSE error, Unit 10, file “Unknown” Image PC Routine Line Source libifcoremd.dll 03DBD3FE Unknown Unknown Unknown

Stack trace terminated abnormally.

I don’t believe its an error in the code because otherwise it would not run the few timesteps.

I don’t know whether it has to do with ‘limited access to C: drive’, where libifcoremd.dll is located.

Can somebody help me ?

---------- 已转发邮件 ----------
From: Muhammad Farooq <engr_farooq85@yahoo.com>
To: trnsys-users@cae.wisc.edu
Date: Thu, 7 Jul 2011 14:56:45 +0100 (BST)
Subject: [TRNSYS-users] type 15-2 weather file

Hi,

I am simulating type 1b solar thermal collector using type 15-2 weather files.I want to calculate the useful energy of the collector for london environment.but the useful energy is in negative,why is that it should be positive.take a look of the simulation result below:I have highlighted it with the red color. waiting for the reply

Time QColl
+0.0000000000000000E+00 +0.0000000000000000E+00
+1.0000000000000000E+00 +0.0000000000000000E+00
+2.0000000000000000E+00 +0.0000000000000000E+00
+3.0000000000000000E+00 +0.0000000000000000E+00
+4.0000000000000000E+00 +0.0000000000000000E+00
+5.0000000000000000E+00 +0.0000000000000000E+00
+6.0000000000000000E+00 +0.0000000000000000E+00
+7.0000000000000000E+00 +0.0000000000000000E+00
+8.0000000000000000E+00 +0.0000000000000000E+00
+9.0000000000000000E+00 -2.4173684203587297E+02
+1.0000000000000000E+01 -2.5441648977456410E+02
+1.1000000000000000E+01 +4.8138101649880042E+01
+1.2000000000000000E+01 +1.6144304197108370E+03
+1.3000000000000000E+01 +3.4669850296828163E+03

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Label not available Period QALFL_S7 +1 +0.5886686097364873E+01 +2 +0.5874571711756289E+01 +3 +0.5870481887832284E+01 +4 +0.5868694237433374E+01 +5 +0.5868229649495333E+01 +6 +0.5868197861127555E+01 +7 +0.5869541899301112E+01 +8 +0.5870883716270328E+01 +9 +0.5870311190374196E+01 +10 +0.4820322541496716E+03 +11 +0.4815497620473616E+03 +12 +0.5858816583640873E+01 +13 +0.4811787499906495E+03 +14 +0.4811684841499664E+03 +15 +0.5855275082867593E+01 +16 +0.4812460304168053E+03 +17 +0.4816156947053969E+03 +18 +0.5858901953324676E+01 +19 +0.5858938519377261E+01 +20 +0.5861233023460954E+01 +21 +0.5864111830014735E+01 +22 +0.5866574035026133E+01 +23 +0.5867884776089340E+01 +24 +0.5869222800247371E+01 Maximum Instantaneous Values Label not available Maximum Value +0.9529092121124268E+04 Time of Maximum +0.9449999999999999E+01 Minimum Instantaneous Values Label not available Minimum Value +0.5852300953119993E+01 Time of Minimum +0.1365000000000000E+02 Maximum Integrated Values Label not available Maximum Value +0.4820322541496716E+03 Time of Maximum +0.1000000000000000E+02 Minimum Integrated Values Label not available Minimum Value +0.5855275082867593E+01 Time of Minimum +0.1500000000000000E+02 Sum (note: sums are set to zero for inputs that were not integrated.) Label not available Total +0.2994399532314856E+04

Attachment: OP_1 tringle.jpg
Description: JPEG image

Attachment: SunSpace.bui
Description: Binary data

Label not available Period Fltoz +1 +0.2279031499056146E+01 +2 +0.2114541971823201E+01 +3 +0.2087683409918100E+01 +4 +0.2069744659820572E+01 +5 +0.2070216990541667E+01 +6 +0.2070541474968195E+01 +7 +0.2079835706390440E+01 +8 +0.2094045986887068E+01 +9 +0.2144003083230928E+01 +10 +0.2472861289826687E+03 +11 +0.2294894303195179E+01 +12 +0.2507755868334789E+03 +13 +0.2514201268041506E+03 +14 +0.2328026363393292E+01 +15 +0.2522034974943381E+03 +16 +0.2533673059742432E+03 +17 +0.2539419648761395E+03 +18 +0.2376539027318358E+01 +19 +0.2414686818374321E+01 +20 +0.2426220254274085E+01 +21 +0.2428240020526573E+01 +22 +0.2418394291307777E+01 +23 +0.2399059619056061E+01 +24 +0.2379940110258758E+01 Maximum Instantaneous Values Label not available Maximum Value +0.1128946709632874E+04 Time of Maximum +0.1655000000000000E+02 Minimum Instantaneous Values Label not available Minimum Value +0.1782002463005483E+01 Time of Minimum +0.9850000000000000E+01 Maximum Integrated Values Label not available Maximum Value +0.2539419648761395E+03 Time of Maximum +0.1700000000000000E+02 Minimum Integrated Values Label not available Minimum Value +0.2069744659820572E+01 Time of Minimum +0.4000000000000000E+01 Sum (note: sums are set to zero for inputs that were not integrated.) Label not available Total +0.1549470256555360E+04

Follow-Ups:

[TRNSYS-users] WEIRD phenomena
- From: 王洋 <wanghongyang1767@gmail.com>

References:

[TRNSYS-users] WEIRD phenomena
- From: 王洋 <wanghongyang1767@gmail.com>