For many countries, increasing energy efficiency and reducing greenhouse gas emissions are key countermeasures to cope with the energy crisis and climate change. Of the various heating equipment such as heat pumps, gas-fired boilers, oil-fired boilers, or electric boilers, heat pumps are widely adopted for space heating, water heating, and process heating by households, business, and industry d...

The shape of the air flow in the interior is heavily influenced by the air distribution system and the way air enters and exits. By numerically simulating flow by computational fluid dynamics, one can determine the flow pattern and temperature distribution and, with the help of the results, provide an optimal design of the air conditioning system. In this study, a chamber was first constructed ...

The main objective of this study is to predict air temperature and humidity at the outlet of a wire-on-tube type heat exchanger using neural networks. For this purpose, initially the heat exchanger was coupled to a refrigeration unit and placed in a wind tunnel. Afterwards, its performance was tested under various experimental conditions. We measured nine input parameters, namely, temperature a...

In order to pr oduce the Consumer Price Index, the Bureau of Labor Statistics c ollects its sample frame using a v ery narrow definition of the target sam ple unit – a retai l establishment or ‘outlet ’. Specifically, an outlet is de fined by the unique combination of operating name, mode (e.g. internet, brick-and-mortar), and if brick-and-mortar, the exact physical address of the st ore. While...

Abstract Purifying air from dust is a very important, current topic. There are many methods to minimize the amount of dust, one them being chamber filters. This paper presents research results newly designed rectangular filter. The efficiency dedusting process influenced by contamination properties, but also construction apparatus, inlet, and outlet location, ratio certain dimensions, gas flow ...

Koto Panjang Reservoir is one of the hydroelectric power plants in Indonesia, located Kampar Regency, Riau Province. This paper aims to determine water quality and tropic status Reservoir. The research was carried out along Reservoir, covering floating net cages area, inlet, outlet, center reservoir. Water samples were collected twice a year, February September 2017. results showed that reservo...