A Numerical Study for Performance Prediction of a Metal Hydride Thermal Energy Conversion System Elaborating the Superadiabatic Condition

In this study, we investigate a numerical-modeling method uniquely performing analyses of 50 different metal hydrides to find the optimized thermal effect. This paper presents a metal-hydride thermal energy conversion method, which offers an alternative approach to the traditional vapor-compression heat pump associated with conventional heating, ventilation, and air conditioning (HVAC). The authors have developed an innovative heat pump applicable to non-vapor compression-based systems, which are in compliance with low-temperature heat source requirements for operation. The new heat pump has a high-energy savings potential for both heating and cooling that featured two different metal-hydrides, that are distributed inside parallel channels filled with porous media. Thermal energy conversion is developed as a set of successive thermal waves. The numerical-modeling results present the enhanced thermal effect, which is attained in a synchronous motion of the thermal waves and the heat source (or sink) inside paired porous media channels, which accompanies the phase transition in the succession of unit metal-hydride heat pumps. The results present in a form convenient for the prediction of thermal energy efficiency based on the proposed thermal-conversion method in real devices that were experimentally verified in previous work. The non-vapor technologies will be operational with low energy input, which makes it possible to utilize waste heat or low-level heat often found in the environment such as solar radiation, exhaust gas from a heat engine, or high-temperature fuel cell system

Clostridium ganghwense sp. nov., isolated from tidal flat sediment

A Gram-negative, strictly anaerobic, halophilic, motile, sporulating and rod-shaped bacterium, T designated strain HY-42-06(T), was isolated from tidal flat sediment from Ganghwa Island in South Korea. The isolate produced glycerol, ethanol and CO2 as fermentation end-products from glucose. Strain HY-42-06(T) grew optimally at 35 degrees C, pH 7(.)5 and 3% (w/v) artificial sea salts. No growth was observed in the absence of sea salts. In phylogenetic analyses based on 16S rRNA gene sequence, strain HY-42-06(T) showed a distinct phyletic line within the members of cluster I of the order Clostridiales. The closest phylogenetic neighbour to strain HY-42-06(T) was Clostridium novyi ATCC 17861(T) (94(.)91% 16S rRNA gene sequence similarity). Several phenotypic characters readily differentiate the tidal flat isolate from phylogenetically related clostridia. On the basis of polyphasic evidence, strain HY-42-06(T) should be classified as a representative of a novel species, for which the name Clostridium ganghwense sp. nov. is proposed. The type strain is HY-42-06(T) (=IMSNU 40127(T) = KCTC 5146(T)=jCM 13193(T)).

Photobacterium ganghwense sp. nov., a halophilic bacterium isolated from sea water

A marine bacterial strain, designated FR1311(T), was isolated from a sea-water sample from Ganghwa. Island, South Korea. Cells were Gram-negative, facultatively anaerobic, catalase- and oxidase-positive, motile, oval or rod-shaped and halophilic, (optimum sea-salt concentration for growth of 5-6%). Phylogenetic analysis of its 16S rRNA gene sequence revealed that it represented a distinct line of descent within the genus Photobacterium. The major fatty acids were straight-chain saturated (C-16:0) and monounsaturated fatty acids (C(16:)1 omega 7c and C-18:1 omega 7c). The predominant respiratory lipoquinone was Q-8. The DNA G + C content was 44 mol%. The phenotypic features of strain FR1199(T) were similar to those of Photobacterium damselae subsp. damselae and Photobacterium damselae subsp. piscicida, but several physiological and chemotaxonomic properties readily distinguish the new isolate from them. On the basis of the polyphasic results revealed in this study, FR1311(T) is considered to be the type strain of a novel species, for which the name Photobacterium ganghwense sp. nov. is proposed. The type strain is FR1311(T) (=IMSNU 60287(T) =KCTC 12328(T)=JCM 12487(T)).

Case Study on the Changes in the Physical Environment in Forest Healing Spaces

This study was conducted to investigate changes in the physical environment in forest healing spaces by examining each of two tree species in a space within the Kasuya Research Forest, Kyushu University. At the study site, culmination and sunset showed high TNVOCs, low concentrations of particulate matter, and low PPD. Of the NVOCs, camphor was detected with the highest concentrations, 0.359 ng/m^3 and 0.142 ng/m^3, in C. camphora and M. thunbergii, respectively. Coniferous trees are generally used when creating an environment for healing purposes, as they are known to emit a large amount of NVOCs. However, according to our results, deciduous trees also emit NVOCs of sufficient concentrations. Therefore, if forest healing spaces are created with the appropriate components, it can have effective results