With the rapid increase of Internet data centers (IDCs), a large amount of electricity is consumed for IDCs' cooling, and a considerable amount of heat is exhausted directly into the ambient all year round. On the other hand, to efficiently and cleanly heat the room in cold regions a lot of...

Absorption heating has attracted increased attention due to its irreplaceable advantages in energy conservation and pollution reduction in heating and domestic hot water supplies. This paper presents the classifications and principles of different absorption heating cycles and comprehensively...

The use of ammonia-based working fluids for absorption prevails in a wide range of applications due to the low freezing temperature of the refrigerant and the absence of crystallization as well as the lack of problems under vacuum conditions. This paper presents a comprehensive overview on the...

The amount of energy used for heating and domestic hot water (DHW) is very high and will keep increasing. The conventional ground source electrical heat pump used in heating-dominated buildings has the problems of thermal imbalance, decrease of soil temperature, and deterioration of heating...

Significant energy mismatch exists in solar water heating systems as the time and amount of solar energy supply are usually different from that of hot water demand. Using a hot water storage tank can reduce or eliminate such mismatch in short term while it is difficult to avoid this mismatch in...

Ground Source Heat Pumps (GSHPs) are extensively used as renewable energy technology over the world. In heating-dominated buildings, the ground thermal imbalance leads to the decrease of the soil temperature and deteriorates the heating performance. Compared with Ground Source Electrical Heat...

The study presented in this paper is based on a detailed review of the literature focused on the use of phase change materials (PCM) for photovoltaic (PV) module thermal regulation and electrical efficiency improvement. The influence of high temperature on PV power generation has been examined...

The heat and mass transfer characteristics of a water permeable membrane were studied to determine appropriate selection criteria for such a membrane in a heat recovery ventilator (HRV). A general physical model was developed to analyze the performance of various types of membrane based HRVs....

Impulsive control of a chaotic system is ideal for designing digital control schemes where the control laws are generated by digital devices which are discrete in time. In this paper, several new theorems on the stability of impulsive control systems are presented. These theorems are then used...