|Program name||Package id||Status||Status date|
|Package ID||Orig. computer||Test computer|
|NESC0809/01||IBM 3033||IBM 3033|
|NESC0809/02||CDC 7600||CDC 7600|
TVENT1P predicts flows and pressures in a ventilation system or other air pathway caused by pressure transients, such as a tornado.
For an analytical model to simulate an actual system, it must have
the same arrangement of components in a network of flow paths;
the same friction characteristics;
the same boundary pressures;
the same capacitance; and
the same forces that drive the air.
A specific set of components used for constructing the analytical model includes filters, dampers, ducts, blowers, rooms, or volume connected at nodal points to form networks. The effects of a number of similar components can be lumped into a single one.
TVENT1P contains a material transport algorithm and features for turning blowers off and on, changing blower speeds, changing the resistance of dampers and filters, and providing a filter model to handle very high flows. These features make it possible to depict a sequence of events during a single run. Component properties are varied using time functions. The filter model is not used by the code unless it is specified by the user. The basic results of a TVENT1P solution are flows in branches and pressures at nodes. A postprocessor program, PLTTEX, is included to produce the plots specified in the TVENT1P input. PLTTEX uses the proprietary CA-DISSPLA graphics software (see http://www.gaeinc.com).
The continuity equation is satisfied at each node in the flow network with the dependent variable (pressure) solved simultaneously by point-wise (local) relaxation techniques. The flows are determined from the calculated pressures with experimental or classical flow descriptions. The boundary conditions are specified as stated but are arbitrary functions of time. The material transport algorithm is based on a simple convection model.
50 boundary nodes
25 plot frames with 4 plots per frame
20 resistance functions
20 removed branches
20 removed nodes
20 points per blower curve
17 blower curves
10 filter models
10 blower speed functions
5 material functions
5 control dampers
Assumptions include one-dimensional, isothermal flow, lumped parameters (neglecting spatial distribution of components), and incompressible flow with fluid storage at nodes. TVENT1P does not include inertia or shock.
TVENT1P is designed to be portable and is highly user-oriented for architect-engineers and heating, ventilation, and air conditioning (HVAC) designers. The program is self-contained and does not require nonstandard system utilities. Line printer plots are generated.
|Package ID||Status date||Status|
|NESC0809/01||17-SEP-1980||Tested at NEADB|
|NESC0809/02||29-SEP-1980||Tested at NEADB|
TVENT1P, NESC No. 809.7600, TVENT1P CDC Version Tape Description, National Energy Software Center Note 87-106, September 30, 1987.
TVENT1P, NESC No. 809.4331, TVENT1P IBM Version Tape Description, National Energy Software Center Note 87-107, September 30, 1987.
|Package ID||Computer language|
Only one set of input data may be processed per execution. The program is structured as a one-level overlay to permit use on medium-size computers and to provide for program expansion. The auxiliary program, PLLTEX, is written in FORTRAN66. The CDC7600 version of PLLTEX was not tested by NESC.
|File name||File description||Records|
|NESC0809_01.003||SIMPLE VENTILATION SYSTEM (S.P.1)||35|
|NESC0809_01.004||TYP. ARCHITECT-ENGINEERING FORMAT (S.P.2)||42|
|NESC0809_01.005||S.P.3 (TO BE RESTARTED)||42|
|NESC0809_01.006||S.P.4 (RESTART JOB)||44|
|NESC0809_01.007||SERIES-PARALLEL NETWORK (S.P.5)||64|
|NESC0809_01.008||SIMPLIFIED SERIES-PARALLEL NETWORK (S.P.6)||46|
|NESC0809_01.009||SIMPLIFIED PARALLEL NETWORK (S.P.7)||46|
|NESC0809_01.010||JCL AT ANL||73|
|NESC0809_01.011||JCL AT NEA||19|
|NESC0809_01.012||PRINTED OUTPUT OF S.P.1||410|
|NESC0809_01.013||PRINTED OUTPUT OF S.P.2||520|
|NESC0809_01.014||PRINTED OUTPUT OF S.P.3||441|
|NESC0809_01.015||PRINTED OUTPUT OF S.P.4||432|
|NESC0809_01.016||PRINTED OUTPUT OF S.P.5||200|
|NESC0809_01.017||PRINTED OUTPUT OF S.P.6||510|
|NESC0809_01.018||PRINTED OUTPUT OF S.P.7||157|
|File name||File description||Records|
|NESC0809_02.003||INPUT DATA FOR S.P.1||35|
|NESC0809_02.004||INPUT DATA FOR S.P.2||42|
|NESC0809_02.005||INPUT DATA FOR S.P.3||42|
|NESC0809_02.006||INPUT DATA FOR S.P.4||44|
|NESC0809_02.007||INPUT DATA FOR S.P.5||64|
|NESC0809_02.008||INPUT DATA FOR S.P.6||46|
|NESC0809_02.009||INPUT DATA FOR S.P.7||64|
|NESC0809_02.010||INPUT DATA FOR S.P.8||46|
|NESC0809_02.011||PRINTED OUTPUT OF S.P.1||410|
|NESC0809_02.012||PRINTED OUTPUT OF S.P.2||520|
|NESC0809_02.013||PRINTED OUTPUT OF S.P.3||441|
|NESC0809_02.014||PRINTED OUTPUT OF S.P.4||432|
|NESC0809_02.015||PRINTED OUTPUT OF S.P.5||591|
|NESC0809_02.016||PRINTED OUTPUT OF S.P.6||510|
|NESC0809_02.017||PRINTED OUTPUT OF S.P.7||585|
|NESC0809_02.018||PRINTED OUTPUT OF S.P.8||509|
Keywords: flow models, nuclear facilities, pressure, tornadoes, transients, ventilation systems.