The purpose of this Technology Installation Review is to provide an overview of the field testing of 18 pre-production prototype units of a “drop-in” type residential heat pump water heater installed in a wide variety of host home situations across the United States for more than one year. It provides descriptions of the construction, installation, control, instrumentation, and data acquisition...

OBJECTIVE To compare the efficacy of forced-air warmers and radiant heaters on rewarming after cardiac surgery in a prospective randomized study. METHODS Fifty male patients who had undergone coronary artery bypass graft surgery were studied. The control group (Gr. C, n=10) was nursed under a standard hospital blanket. Two groups were treated with forced-air warmers: WarmTouch 5700 (Gr. WT, n...

In this paper we describe a novel long-term microhotplate temperature sensor calibration technique suitable for Built-In Self Test (BIST). The microhotplate thermal resistance (thermal efficiency) and the thermal voltage from an integrated platinum-rhodium thermocouple were calibrated against a freshly calibrated four-wire polysilicon microhotplate-heater temperature sensor (heater) that is not...

result from other techniques, such as those requiring aeration of cultures. The exhaust air from such operationls must be sterilized and the most reliable means of doing this is incineration. The 1 cfm capacity of the incinerator described above is sufficient for mnost laboratory scale operations. If provision is made for cooling the exit air, the apparatus may be employed as a source of steril...

The 3ω method is popular for thermal conductivity measurements. It consists of a strip heater above a substrate, and the results are usually based on approximate solutions of the heat conduction equation for simplified heating in which the heater is assumed to be a thin plate. Through numerical studies, it is found that a finite heater thickness has an effect on the value of the thermal conduct...

BACKGROUND Infants and children cool quickly because their surface area (and therefore heat loss) is large compared with their metabolic rate, which is mostly a function of body mass. Rewarming rate is a function of cutaneous heat transfer plus metabolic heat production divided by body mass. Therefore, the authors tested the hypothesis that the rate of forced-air rewarming is inversely related ...

Nitrogen dioxide (NO2) is one of a number of nitrogen compounds that are by-products of combustion and occur in domestic environments following the use of gas or other fuels for heating and cooking. In this study, we examined the effect of two levels of NO2 on symptoms, lung function and airway hyperresponsiveness (AHR) in asthmatic adults and children. In addition, in the same subjects, we exa...

Abstract In this paper, the research progress of ammonium bisulfate (ABS) volatilization in coal-fired power plants SCR denitrification process was reviewed. Combination with self-made experiments, SEM, flue gas analyzer and TG-DTG curves ABS ion chromatography. The condensation characteristics were investigated carefully. Results show that as temperature increased by 50 o C, ABS/AS rate an ord...

Frost deposits on the outdoor heat exchanger of an air source pump (ASHP) conditioner and reduces its capacity during winter operation. However, prevailing reverse-cycle defrosting (RCD) turns indoor into evaporator ceases supply to living space. Consequently, thermal comfort for occupants is deteriorated. This article proposes a heater-assisted ASHP tackle this problem. With 800 W electromagne...

A new measurement technique for the determination of the heat transfer coefficient and the film cooling effectiveness is presented. It is based on a regression of multiple transient liquid crystals experiments using an electrical heater-foil producing a nonhomogeneous surface heat flux. This is particularly interesting for film-cooled surfaces where each cooling hole in the heater-foil leads to...