The analysis of building abnormal energy consumption is great significance to the effective saving buildings. To apply relationship between running status equipment and diagnosis consumption, an method based on improved Apriori association rules proposed. An algorithm proposed for data with a large amount multi-value attributes. determines whether different attribute values same are in advance ...

The paper presents the results of a study frost formation on surface heat exchanger fins when moist air flow is flown around. description experimental stand and procedure are given. effect efficiency transfer was estimated from time temperature dependences at various points fin surface. During experiments, thickness layer degree overlap intercostal spaces were monitored visually using an anemom...

Energy is the lifeblood of the modern world. Because of the negative environmental impacts and limited sources of fossil fuels, researchers are increasingly focusing on renewable energy sources, particularly solar energy due to its cleanliness and natural availability. Along with photovoltaic systems, solar thermal energy has been used over the last few decades to meet the refrigeration needs f...

Since long time, it has been noticed that refrigerators are the devices which work almost 365 days round the clock; hence objective of energy efficiency improvement attracts much. There are several ways of improving the performance of a vapor compression refrigeration cycle. Use of an ejector as expansion device is one of the alternative way. The advent of new component ‘Ejector’ into refrigera...

Simultaneous production of fresh water and refrigeration are often required, e.g. in warm-climate water-deficient regions, and this study is a proposal and analysis of an efficient way of producing both of them by consuming mainly low-grade heat. After introducing the configuration choice methodology, a combined refrigeration and water system, ARHP-MEE (Absorption Refrigeration Heat Pump and Mu...

A suction line of a refrigeration cycle with vertical upward flow is one area where the refrigeration oil tends to accumulate. This paper discusses the flow characteristics of the oil film in a pipe with the vertical upward flow. Air and oil two-phase flow is used as the first step of the study and the flow pattern of the oil film in the vertical upward flow is observed. The oil film thickness ...

Abstract Global commercial market forecasted around 45 billion US dollars for refrigeration equipment in 2021. Currently used refrigerants have high global warming potential (GWP); hence, environment-friendly system using the Peltier effect is being considered this research. The thermodynamic has a low coefficient of performance (COP), when compared to chlorofluorocarbon (CFC) and hydrofluoroca...

This paper investigates the interaction between supermarket heating, ventilation and air conditioning and refrigeration systems through simulation in EnergyPlus. This interaction has been studied by modelling a generic UK supermarket. The impact on the sum of HVAC and refrigeration energy consumption due to changes in a range of operating conditions was studied. These include the effect of alte...

In view of the feature long airflow path, high wind resistance, and large area refrigeration equipment in traditional data room, a new type under-floor modular air conditioner its corresponding conditioning solution for room is proposed this paper. The mathematical physical model established through computational fluid simulation software compared with two mainstream solutions. Meanwhile, impac...