A dynamic thermal performance model for flat-plate solar collectors based on the thermal inertia correction of the steady-state test method

2015 ◽  
Vol 76 ◽  
pp. 679-686 ◽  
Author(s):  
Jie Deng ◽  
Yupeng Xu ◽  
Xudong Yang
Keyword(s):  
Steady State ◽  
Flat Plate ◽  
Thermal Performance ◽  
Thermal Inertia ◽  
Performance Model ◽  
Test Method ◽  
Solar Collectors ◽  
State Test ◽  
Steady State Test

scholarly journals Uncertainty in Determining Thermal Performance of Liquid-Heating Flat-Plate Solar Collectors

1981 ◽  
Vol 103 (2) ◽  
pp. 126-134 ◽  
Author(s):  
E. R. Streed ◽  
D. Waksman
Keyword(s):  
Statistical Analysis ◽  
Measurement Uncertainty ◽  
Flat Plate ◽  
Thermal Performance ◽  
Test Method ◽  
Data Sets ◽  
Solar Collectors ◽  
Performance Measurements ◽  
Outdoor Test

Thermal performance measurements of eight types of liquid-heating flat-plate solar collectors were conducted with two to four collectors of each type at four outdoor test sites. Tests were performed in accordance with the procedure prescribed by ASHRAE Standard 93-77. Statistical analysis of data sets for each collector type within test sites and between test sites was done using ASTM recommended methods to evaluate test method measurement uncertainty.

scholarly journals Investigation of Thermal Performance of Flat Plate and Evacuated Tubular Solar Collectors According to a New Dynamic Test Method

2012 ◽  
Vol 30 ◽  
pp. 152-161 ◽  
Author(s):  
Weiqiang Kong ◽  
Zhifeng Wang ◽  
Jianhua Fan ◽  
Bengt Perers ◽  
Ziqian Chen ◽  
...  
Keyword(s):  
Flat Plate ◽  
Thermal Performance ◽  
Dynamic Test ◽  
Test Method ◽  
Solar Collectors

Investigation of the intake tumble flow in a prototype GDI engine using a steady-state test rig

2001 ◽  
Author(s):  
M. Auriemma ◽  
F. E. Corcione ◽  
S. Diana ◽  
G. Police ◽  
G. Valentino
Keyword(s):  
Steady State ◽  
Test Rig ◽  
State Test ◽  
Gdi Engine ◽  
Steady State Test

scholarly journals An experimental study of the thermal performance of the square and rhombic solar collectors

2018 ◽  
Vol 22 (1 Part B) ◽  
pp. 487-494 ◽  
Author(s):  
Aminreza Noghrehabadi ◽  
Ebrahim Hajidavaloo ◽  
Mojtaba Moravej ◽  
Ali Esmailinasab
Keyword(s):  
Experimental Study ◽  
Flat Plate ◽  
Mass Flow Rate ◽  
Mass Flow ◽  
Flow Rate ◽  
Thermal Performance ◽  
Thermal Efficiency ◽  
Solar Collectors ◽  
Heating Systems ◽  
Solar Water Heating

Solar collectors are the key part of solar water heating systems. The most widely produced solar collectors are flat plate solar collectors. In the present study, two types of flat plate collectors, namely square and rhombic collectors are experi?mentally tested and compared and the thermal performance of both collectors is investigated. The results show both collectors have the same performance around noon (?61%), but the rhombic collector has better performance in the morning and afternoon. The values for rhombic and square collectors are approximately 56.2% and 53.5% in the morning and 56.1% and 54% in the afternoon, respectively. The effect of flow rate is also studied. The thermal efficiency of rhombic and square flat plate collectors increases in proportion to the flow rate. The results indicated the rhombic collector had better performance in comparison with the square collector with respect to the mass-flow rate.

scholarly journals Thermal Performance of Solar Collectors with EPDM Absorber Plates

1988 ◽  
Vol 41 (4) ◽  
pp. 623
Author(s):  
MJ O'Keefe ◽  
JLA Francey
Keyword(s):  
Experimental Study ◽  
Thermal Resistance ◽  
Flat Plate ◽  
Heat Loss ◽  
Thermal Performance ◽  
Critical Value ◽  
Solar Collectors ◽  
Flow Rates ◽  
Mass Flow Rates ◽  
High Thermal Resistance

An experimental study of flat-plate solar collectors using ethylene, propylenediene monomer (EPDM) absorber plates is descn"bed. In spite of the high thermal resistance of this material the performance is found to compare well with metal absorbers and to be in agreement with the Hottel-Whillier-Bliss equation. There is, however, an observed increase in the heat loss coefficient for mass flow rates below a critical value.

Continuous-Operation Test at Engineering Scale Uranium Crystallizer System

2009 ◽  
Author(s):  
Tadahiro Washiya ◽  
Toshimitsu Tayama ◽  
Kazuhito Nakamura ◽  
Kimihiko Yano ◽  
Atsuhiro Shibata ◽  
...  
Keyword(s):  
Steady State ◽  
Crystallization Process ◽  
Continuous Operation ◽  
Energy Agency ◽  
Monitoring Method ◽  
State Test ◽  
Operation Test ◽  
The Stability ◽  
Crystal Accumulation ◽  
Steady State Test

Uranium crystallization based on solubility difference is one of the remarkable technologies which can provide simple process to separate uranium in nitric acid solution since the process is mainly controlled by temperature and concentration of solute ions. Japan Atomic Energy Agency (JAEA) and Mitsubishi Materials Corporation (MMC) are developing the crystallization process for elemental technology of FBR fuel reprocessing.[1–3] The uranium (U) crystallization process is a key technology for New Extraction System for TRU Recovery (NEXT) process that was evaluated as the most promising process for future FBR reprocessing.[4–6] We had developed an innovative crystallizer and carried out several fundamental investigations. On the basis of the results, we fabricated an engineering-scale crystallizer and have carried out continuous operation test to investigate the stability of the equipment at steady and non-steady state conditions by using depleted uranium. As for simulating typical failure events in the crystallizer, crystal accumulation and crystal blockage were occurred intentionally, and monitoring method and resume procedure were tried and selected in this work. As the test results, no significant phenomenon was observed in the steady state test. And in the non-steady state test, process fluctuation could be detected by monitoring of screw torque and liquid level in the crystallizer, and all failure events are proven to be recovered by appropriate resumed procedures.

Thermal Hydraulic Test of Advanced Fuel Bundle With Spectral Shift Rod (SSR) for BWR: Steady State and Transient Test Results and Analysis

2012 ◽  
Author(s):  
Takao Kondo ◽  
Kazuaki Kitou ◽  
Masao Chaki ◽  
Yukiharu Ohga ◽  
Takeshi Makigami
Keyword(s):  
Steady State ◽  
Water Level ◽  
Simulation Analysis ◽  
Spectral Shift ◽  
Test Results ◽  
Analysis Method ◽  
Fuel Bundle ◽  
State Test ◽  
Shift Effect ◽  
Steady State Test

Japanese national project of next generation light water reactor (LWR) development started in 2008. Under this project, spectral shift rod (SSR) is being developed. SSR, which replaces conventional water rod (WR) of boiling water reactor (BWR) fuel bundle, was invented to enhance the BWR’s merit, spectral shift effect for uranium saving. In SSR, water boils by neutron and gamma-ray direct heating and water level is formed as a boundary of the upper steam region and the lower water region. This SSR water level can be controlled by core flow rate, which amplifies the change of average core void fraction, resulting in the amplified spectral shift effect. This paper presents the steady state test with varied SSR geometry parameters, the transient test, and the simulation analysis of these steady state and transient tests. The steady state test results showed that the basic functioning principle such as the controllability of SSR water level by flow rate was maintained in the possible range of geometry parameters. The transient test results showed that the change rate of SSR water level was slower than the initiating parameters. The simulation analysis of steady state and transient test showed that the analysis method can simulate the height of SSR water level and its change with a good agreement. As a result, it is shown that the SSR design concept and its analysis method are feasible in both steady state and transient conditions.

Sign in / Sign up

Export Citation Format

Share Document