This paper describes the modelling and analysis of a 5 MW chilled water plant used for the cooling of a recently constructed data centre in the UK. The model was developed using the TRNSYS software with the aim of studying the impact of perturbations such as chiller failure on the water and air temperatures in the system. The model includes the chillers, hydraulic network (piping, valves and pu...

Light envelopes are more and more frequently used in modern buildings but they do not present sufficient thermal inertia. A solution to increase this inertia is to incorporate a phase change material (PCM) in this envelope. This paper presents the performance of a test-cell with a new structure of light wallboards containing PCMs submitted to climatic variation and a comparison is made with a t...

Centralized hot water systems are commonly installed in college student dormitories, representing a typical application for such systems. To achieve sustainable and environmentally friendly heating solutions, air-source heat pump have gained attention their high efficiency energy-saving characteristics. By implementing technology, China could make significant progress towards achieving its carb...

This study focuses on the modelling and simulation of an existing active forced circulation solar water heating system in College Science Technology under Royal University Bhutan. The installed prototype consists five flat-panel collectors connected parallel, with a gross surface area 10 m2, 500-litre storage tank built-in heat exchanger to preheat student mess. TRNSYS (Transient System Simulat...

Nowadays, rehabilitation in historic centers can become a challenge due to the restrictions concerning requirements for building envelope. Portugal has conducted studies define maximum U values [W/(m2 K)] single components based on indoor temperature. Despite relative humidity being crucial thermal comfort, current Portuguese scheme energy certification of buildings does not consider it. Additi...

A real case study of an energy system based on a Solar Assisted Heat Pump (SAHP) fed by hybrid photovoltaic-thermal solar panels (PVT) and seasonal storage (SS) is presented in this paper. Exergy exergy cost analyses are proposed as complementary methods for the assessment better understanding efficiency cogeneration configuration. The performance takes advantage heat summer, when resource high...

This paper evaluates the influence of several parameters on the potential of using increased thermal capacitance (ITC) as a passive energy management technique to decrease a building’s cooling load. ITC is implemented by circulating water from a storage tank through a piping system located in the building’s ceiling. The cooling load of the ITC enhanced building is compared to the cooling load o...

Over the last 15 years, computerized controls have become more and more common in our homes. The smart home looks at expanding the use of the computers into the difference parts of the home, creating a network that can be easily and conveniently controlled. The use of computer controls removes the need to actually flick a switch and allows elements of the home to respond automatically to the pe...