Thermal converters at cryogenic temperature have been recently developed in some metrological laboratories. By means of these devices high sensitivity measurements at the level of 1 mV can be performed. In this paper we report on the evaluation of high critical temperature (HTc) device characteristics. Experimental results show that this device, which operates at liquid nitrogen temperature, ha...

Radiation shielding analysis and development for the Nuclear Cryogenic Propulsion Stage (NCPS) effort is currently in progress and preliminary results have enabled consideration for critical interfaces in the reactor and propulsion stage systems. Early analyses have highlighted a number of engineering constraints, challenges, and possible mitigating solutions. Performance constraints include pe...

high moisture levels in fresh dairy manure provide a suitable environment for growth of pathogens and cause environmental pollution. dry manure can be used for different purposes in agriculture and in livestock industry. such heat properties of manure as specific heat, thermal conductivity and thermal diffusivity are important needed factors for the design and development of a suitable efficien...

The system design of window air conditioner does not evolve in one day. Due to the continous efforts are taken by the refrigeration and air conditionging professionals, successful and economic models of window air conditioners are currently used. This paper states about the development of window air conditioner with phase change material and water as refrigerants. Developed air conditioner was ...

Abstract In machine tools, it is important to maintain accuracy against heat in the entire machining space. The reduction of thermal displacement achieved by measuring accurately and then clarify relationship between temperature change deformation creating prediction compensation model or applying countermeasure suppress deformation. To solve this issue, authors have developed methods measure t...

We reared Cloeon dipterum from egg hatch to adult at 10 constant temperatures (12.1–33.57C) to test 3 hypotheses (thermal equilibrium hypothesis, temperature size rule [TSR], and O2and capacity-limited thermal tolerance [OCLTT]) that account for variation in life-history traits across thermal gradients. Male and female adult size declined ~67 and 78% and larval development time declined ~88% wi...

Chemical incompatibility and low thermal conductivity issues of molten-salt-based thermal energy storage materials can be addressed by using microstructured composites. Using a eutectic mixture of lithium and sodium carbonates as molten salt, magnesium oxide as supporting material, and graphite as thermal conductivity enhancer, the microstructural development, chemical compatibility, thermal st...