Measurement and evaluation of indoor thermal environment in a naturally ventilated industrial building with high temperature heat sources

2016 ◽  
Vol 96 ◽  
pp. 35-45 ◽  
Author(s):  
Yi Wang ◽  
Jie Gao ◽  
Xiao Xing ◽  
Yuanlu Liu ◽  
Xiaojing Meng
Keyword(s):  
High Temperature ◽  
Thermal Environment ◽  
Industrial Building ◽  
Heat Sources ◽  
Indoor Thermal Environment ◽  
Temperature Heat ◽  
Measurement And Evaluation

Thermodynamic peculiarities of alpha-type Stirling engines for low-temperature difference power generation: Optimisation of operating parameters and heat exchangers using a third-order model

2013 ◽  
Vol 228 (11) ◽  
pp. 1936-1947 ◽  
Author(s):  
Benedikt Hoegel ◽  
Dirk Pons ◽  
Michael Gschwendtner ◽  
Alan Tucker ◽  
Mathieu Sellier
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Temperature Difference ◽  
Heat Exchangers ◽  
Operating Parameters ◽  
Heat Sources ◽  
Third Order ◽  
Concentrated Solar Energy ◽  
Stirling Engines ◽  
Temperature Heat

Low-temperature heat sources such as waste heat and geothermal energy in the range from 100 ℃ to 200 ℃ are widely available and their potential is largely untapped. Stirling engines are one possibility to convert this heat to a usable power output. Much work has been done to optimise Stirling engines for high-temperature heat sources such as external combustion or concentrated solar energy but only little is known about suitable engine layouts at lower temperature differences. With the reduced temperature difference, changes become necessary not only in the heat exchangers and the regenerator but also in the operating parameters such as frequency and phase angle. This paper shows results obtained from a third-order simulation model that help to identify beneficial parameter combinations, and explains the differences of low and high-temperature engines.

scholarly journals Existence of High Temperature Geothermal Resources in the Igneous Rock Regions of South China

2021 ◽  
Vol 9 ◽  
Author(s):  
Yiman Li ◽  
Jiao Tian ◽  
Yuanzhi Cheng ◽  
Guangzheng Jiang ◽  
Ying Zhang ◽  
...  
Keyword(s):  
High Temperature ◽  
Temperature Measurement ◽  
South China ◽  
Hot Springs ◽  
Hainan Island ◽  
Heat Sources ◽  
Geothermal Resources ◽  
Production Values ◽  
Temperature Heat ◽  
Borehole Temperature

Large areas of Yanshan period granites with high heat production values (3–10 μW/m3) and mantle plume around Hainan province co-exist in Igneous Rocks Regions of South China (IRRSC). Surface manifestations are mainly warm/hot springs with temperatures below 90 °C and no typical phenomenon of high temperature resources have been observed. The main objective of this paper is to discuss the existence of high temperature geothermal resources and their possible locations under this kind of geothermal and tectonic background by analysis of high temperature heat sources, borehole temperature measurement, and reservoir temperature estimation. Two possible partial melts of the magma chamber were detected as high temperature heat sources in the Southern Leizhou Peninsular and North Hainan Island at a depth of 8–15 km. Other low resistivity zones in the upper crust are more likely caused by fluid in the formations or faults but not high temperature heat sources. This was also verified by borehole temperature measurement in these two areas, with maximum formation temperatures of 211°C and 185°C found, respectively. Reservoir temperatures from fluid geothermometers show lower temperatures of between 110–160°C for typical geothermal fields over the IRRSC but not in the Southern Leizhou Peninsular and Northern Hainan Island. In all, high temperature geothermal resources may be found in the Southern Leizhou Peninsular and on Northern Hainan Island.

Measurement and evaluation of the indoor thermal environment in a large domed stadium

2000 ◽  
Vol 32 (2) ◽  
pp. 217-223 ◽  
Author(s):  
T Nishioka ◽  
K Ohtaka ◽  
N Hashimoto ◽  
H Onojima
Keyword(s):  
Thermal Environment ◽  
Indoor Thermal Environment ◽  
Measurement And Evaluation

A Study of High-Temperature Heat Pipes With Multiple Heat Sources and Sinks: Part I—Experimental Methodology and Frozen Startup Profiles

1991 ◽  
Vol 113 (4) ◽  
pp. 1003-1009 ◽  
Author(s):  
A. Faghri ◽  
M. Buchko ◽  
Y. Cao
Keyword(s):  
High Temperature ◽  
Heat Pipe ◽  
High Heat ◽  
Experimental Methodology ◽  
Heat Sources ◽  
Sources And Sinks ◽  
Temperature Heat ◽  
Heat Loads ◽  
Steel Heat ◽  
Rejection Rates

A high-temperature sodium/stainless steel heat pipe with multiple heat sources and sinks was fabricated, processed, and tested. Experimental results from tests performed both under vacuum and in air are presented. The startup behavior of the heat pipe from the frozen state was investigated for various heat loads and input locations, with both low and high heat rejection rates at the condenser. No startup evaporator dryout failures were found, although the heat pipe was sonic-limited during startup in air.

Development of the High Performance Thermoelectric Modules for High Temperature Heat Sources

2007 ◽  
pp. 1521-1524 ◽  
Author(s):  
Takahiro Jinushi ◽  
Masahiro Okahara ◽  
Zenzo Ishijima ◽  
Hideo Shikata ◽  
Mitsuru Kambe
Keyword(s):  
High Temperature ◽  
High Performance ◽  
Heat Sources ◽  
Thermoelectric Modules ◽  
Temperature Heat

Performance Analysis of a Cascading Adsorption Cycle Powered by High-Temperature Heat Sources for Low-Temperature Cooling in Hot Climates

2020 ◽  
Vol 12 (5) ◽  
Author(s):  
Dalila Abbaz ◽  
Abla Chaker ◽  
Mahmoud Bourouis
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Low Temperatures ◽  
Thermal Conditions ◽  
Coefficient Of Performance ◽  
Large Temperature ◽  
Heat Sources ◽  
Adsorption Refrigeration ◽  
Temperature Heat ◽  
Adsorption Cycle

Abstract Cascade adsorption refrigeration technology using high-temperature driving heat is a very promising option for low-temperature cooling applications due to the large temperature difference between the heat source and the cold distributed. The present work carried out a feasibility and parametric study in order to analyze the functioning of a cascading adsorption cycle using the working pair zeolite/ammonia in beds operating at high temperatures and activated carbon/ammonia in those operating at low temperatures. At the nominal thermal conditions, namely, heating, condensing, and evaporating temperatures of 280 °C, 35 °C, and (−5) °C, respectively, the coefficient of performance (COP) and the specific refrigerating capacity (SCP) of the cycle were 0.53 and 67.1 W/kg. When the driving temperature is varied from 260 °C to 320 °C, the COP increases by 57% and the SCP by 36%. The performance of the cascading adsorption cycle at negative evaporating temperatures is very satisfactory.

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