To alleviate worker's thermal discomfort in a moderately hot environment, new cooling vest was designed and proposed this paper. investigate the effect of to collect knowledge for design comfortable vest, subjective experiments were conducted. Two kinds vests, one commercially available one, used comparison. The had more insulation its surface temperature higher than one. Experiments performed climatic chamber where operative controlled at 30.2°C relative humidity 37% under still air. In...

Abstract Information on air‐conditioning and ventilation has been continuously disseminated in response to the Japanese Government's announcement of need for appropriate measures against new coronavirus disease (COVID‐19), issuing an emergency presidential discourse by presidents Engineering Societies. In this paper, we add information latest knowledge behavior SARS‐CoV‐2 air, describe its diffusion characteristics built environment, summarize effects temperature humidity virus. Then...

In order to obtain the fundamental information for discussing residential energy saving strategies, long-term investigation of detail consumption and indoor climate Have been done in 2002 2003 80 dwellings, including detached houses apartments, six districts Japan. The occupant's behavior building thermal performance were also investigated. Energy each appliance was measured as much possible. This paper reports description all end use structure annual consumption. main results are following;...

We have developed an energy-saving operations system featuring remote operation of central monitoring equipment installed in a building. This applies robotic process automation to automatically perform on behalf the manager. Furthermore, as another feature, requires only local area network connect enabling automatic be performed regardless specifications equipment. The items targeted for by this are optimal heat source system, setting supply water temperature equipment, room temperature, and...

The evaluation of air-flow systems for telecommunication equipment rooms was carried out experimentally. Parameters were room air temperature distribution and ambient electric parts, i.e. around circuit boards, which are influenced by an system. under-floor supply overhead return system has shown to be superior other flow its allowable average heat density up 1.1 kW/m/sup 2/. A microcomputer control unit developed the cooling unit. It is that this can optimize refrigeration cycle under low...

The performance of the following four air flow systems are compared: (A) underfloor supply/overhead return; (B) supply/horizontal (C) overhead supply/underfloor and (D) return. return system is best, because under same heat density supply temperature, it requires lowest rate to realize average temperature distribution conditions. A ventilation ratio model for proposed. Experimental results included in this simple mathematical model. shows that inlet depends only on into room equipment intake...

A detailed experimental study of air flow systems for telecommunications equipment rooms is presented. Particular emphasis placed on the factors that determine ambient temperature electric parts in with natural cooling. very close relationship between environmental surroundings and cooling performance has been found. The salient elements affecting are described, advantages a system underfloor supply overhead return detailed. Such were found to be superior high-heat-density rooms, even up an...

This study described the energy consumption of various electric appliances in houses Japan. In order to obtain fundamental information for discussing residential saving strategies, long-term investigation detail have been done from 2002 2003 80 dwellings. The results are as follows; (1) Energy refrigerators actual condition exceeds catalog value. (2) Relationship between refrigerator capacity and annual is low. (3) standby electricity 20% or less total house. (4)The amusement use house most...

In this study, it is an object of the establishment design methodologies for all pneumatic radiation air-conditioning system task ambient correspondence, expansion documents. A large-scale experiments carried out about air conditioning using with a membrane unit to verification comfort. And We Performed case study each condition system. considered effect and conditions comfort, consider how easily estimate,

Abstract Advances in next‐generation sequencing (NGS) technologies since 2005 have revolutionized biological science. One particular application of NGS is to elucidate microbiomes built environments. We are currently conducting a series studies on the elucidation and control mass infection mechanisms based dynamic measurement environment microbiomes. The objective this study clarify dispersion characteristics oral bacteria environment. Bacterial communities from occupants’ hands cavities,...

The Coefficient of Performance an ordinary water-cooled chiller is presented as a relationship with the load factor and cooling water temperature. However, temperature fluctuates according to processed heat tower originating in energy outside humidity. It therefore difficult obtain under processed-heat weather conditions at time evaluation. This, turn, makes it determine evaluation time. In this research, we formulated specific enthalpy air. Specifically, used Number Transfer Units (NTU)...

Herein, we aimed to improve the thermal insulation of polyvinyl chloride (PVC) windows reduce energy consumption buildings. Currently, gold standard PVC window is triple glazed and has a transmittance 0.7 W/(m2·K). However, further reduction in via quadruple glazing not feasible because this would make too heavy expensive. We searched for an alternative method reducing without increasing weight. The frame, glazing, edge parts significantly affect overall insulation; thus, evaluated...

In data centers, heating, ventilation, and air-conditioning (HVAC) consumes 30–40% of total energy consumption. Of that portion, 26% is attributed to fan power, the ventilation efficiency which should thus be improved. As an alternative method for experimentations, computational fluid dynamics (CFD) used. this study, “parameter tuning”—which aims improve prediction accuracy CFD simulation—is implemented by using known as “design experiments”. Moreover, it attempted thermal environment a...

The aim of this study is to clarify energy consumption structure on large-scale university campuses which have the vast amounts land and buildings in cold regions where electricity demand thermal are characteristic. Through analysis, for entire campus, comparison among national universities based environmental reports performed, nationwide positioning primary characteristics target campus grasped. Meanwhile, individual departments, leveling rate electrification newly calculated addition...

In order to stabilization of the energy supply and demand in residential area, it is important grasp peak consumption. this paper, we examine electricity, frequency distribution day-load-rate outbreak time 6 detached houses based on measurements for conclusion, 1) all electrified houses, electricity concentrate midnight. On other hand, distributed wide that use gas kerosene. 2) The changes by a season kerosene change day. 3) A range annual houses.4) Day-load-rate decreases summer day

Radiation air-conditioning system is one of the means to improve heat environment. Many researchers have not yet examined air-type radiation system. Therefore, should accumulate evaluation results and establish design methods about A purpose this study clarify a thermal performance based on actual survey result for cooling period in office. In Chapter 2, we performances air conditioners As having analyzed quantity heat-treatment conditioners, as FCU rate operation average, July August were...

The thermal performance and equipment type specified for a newly built house were investigated as benchmarks to enable the selection of appropriate insulation specifications. prevalence electric heater installations space heating hot water supply decreased in 2012, compared 2011. However, it is estimated that primary energy consumption high particularly cold areas Hokkaido, because this remains common these areas. Because there an initiative contractors when determined, important provide...

The purpose of this study is to have a better understanding exergetic balance northern regional houses in summer, and make known correlation between thermal sensation radiant exergy their houses. Followings are results. First, the cool flows thorough earth tube daytime equivalent 10[%] that by ventilation. Second, there relation-ship temperature difference cognition outdoor or warm exergy. Third, 400[mW/m2] emitted at maximum from wall surfaces, stored into surrounding walls, finally...

A field measurements of the blood pressure change elderly with room air temperature during bathing were made in winter Sapporo and Fukui. Average temperatures undressing versus Fukui 19.8 12.6 degree-C. The differences between living 2.7 6.5 degree-C, respectively. It would appear that insulation performance houses is higher Therefore, over 5 degree drop brings about a terrible rise their at probability 80 percent or more.

The authors describe a result obtained from reliability calculation for an air conditioning system used high-power equipment. In the calculation, time delay effect caused by heat capacity and transmission is considered. Two methods are considered improving power train reliability: (1) itself as common block; (2) attaching some functions to in order avoid block increase. An example of shown.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>

The aim of this study is to clarify the effects thermal storage system in midnight using waste heat and electric power, propose new floor heating characteristics on external insulated houses. On numerical simulation conditionally specified model, results were as follows; (1) It was possible maintain room temperature surface by after stopping daytime. (2) amenity environment evaluated PMV PPD, usefulness confirmed. (3) confirmed that intermittent approximately 6 hours for a day irrational...

The number of house with thick insulation and air tightness is increasing in cold climate region to decrease heating energy save daily life cost. Decreasing fresh load important such houses. purpose this study develop pre-heating system by using solar heat collector thermal storage system. First, we examined the performance Second, made numerical model. Third, analyzed possibility application

A new energy-efficient air conditioning system in proposed for a computer room with high heat generating equipment where forced cooling volume is prescribed. In the system, conditioned primary from AHU reduced accordance load, while insufficient compensated by induced secondary air. Reduction of saves fan capacity and consequently improves efficiency AHU. This paper describes an on-site survey conventional as well modeling distribution around equipment, validation based on field experiments.