Numerical calculation of absorption heat transformer to upgrade ultra-low grade waste heat

The data is some calculation results about the performance of a absorption heat transformer to upgrade ultra-low grade heat from 40 to 60 C , including temperature lift and system efficiency. The study was conducted to satisfy the project requirement to seek possible method for low grade waste heat recovery

Heating demand and available useful solar heat in different cities in the UK

The data contains three Excel documents with different return water temperatures at 30, 40 and 50 °C respectively. The calculated heating demands of dwellings in 8 different cities in the UK with different heat loss coefficients (50, 150 and 250 W/K) were given; The available useful solar heat from tilted flat-plate solar collector (30, 45, 60°C slope angle, facing south) were calculated and given

Data of calculation results of SSTES system using chemisorption for domestic dwellings in the UK

The data is the calculated results of the performance of a seasonal solar thermal energy storage system using CaCl2-NH3, BaCl2-NH3 or NaBr-NH3 chemisorption for a typical domestic dwelling in Newcastle-upon-Tyne, including the charging performance in the summer and the discharging performance in the winter. The storage volume, stored energy and the fraction of the released heat to the total heat are given

Numerical calculation of sodium acetate trihydrate as seasonal solar energy storage material

The data gives the basic thermo-physical properties of sodium acetate solution and sodium acetate trihydrate, including phase diagram, density, specific heat and thermal conductivity. The simulation process of the solidification process of sodium acetate solution is given. The temperature changes of each components in the storage system are given

Advanced Absorption Power Generation Cycles

This data gives the introduction of the proposed advanced absorption power generation cycles, their analysis method and their performance

Ejector modelling for ejection refrigeration system

The data gives all the used modelling equations and the results of an ejector for ejection refrigeration. The key finds of this modelling was the values of hypothetical throat area for the secondary fluid in the ejector, based on which empirical equations have been built for the working fluids of R134a, R141b and steam

Dynamic modelling and experimental validation of scroll expander for small scale power generation system

The data is the modelling process of a scroll expander-generator system used in small scale power generation system. The study was conducted to satisfy the project requirement to explore methods for ultra-low grade waste heat recovery

Frictional losses in free-piston engine and crankshaft engines

The main friction mechanisms were identified to be the piston assembly including piston rings and piston skirt, valve train system, the crank and bearing system for the CSE, and the linear electric generator for the FPE. The frictional loss of each friction mechanism was estimated and discussed

Data supporting the paper “The characteristics of a Linear Joule Engine Generator operating on a dry friction principle”

Experimental results from a Linear Joule Engine Generator prototype are compared with the numerical simulation results predicted by the proposed friction model and other reported friction models identified from the wider engineering literature. Data obtained from these experimental results and the outputs from the model

Scavenging Process of a Two-Stroke Free-Piston Engine

In this research, the piston dynamic characteristics of an FPEG is compared with that of a conventional engine (CE) of the same size, and the difference in the valve timing is compared for both port scavenging type and valve scavenging type, with the exhaust valve closing timing is selected as the parameter