The paper concerns in particular gas engine driven heat pump. It presents where in the industry the heat pump is used with a mechanical drive. There are mentioned the main directions of development and first of all pumps driven by gas engine. The paper provides an overview of the advantages and disadvantages of this approach and circuit diagrams reproduced with heat pumps powered by a gas engine. Simple comparison shows the emissions for the creation of electricity (electric motor) and mechanical power (gas engine). A review of applications of gas engine driven heat pumps in Poland and abroad is presented. The basic parameters of the systems, principles of operation, operational problems and approximate costs are mentioned.
This paper provides some information about thermoelectric technology. Some new materials with improved figures of merit are presented. These materials in Peltier modules make it possible to generate electric current thanks to a temperature difference. The paper indicates possible applications of thermoelectric modules as interesting tools for using various waste heat sources. Some zero-dimensional equations describing the conditions of electric power generation are given. Also, operating parameters of Peltier modules, such as voltage and electric current, are analyzed. The paper shows chosen characteristics of power generation parameters. Then, an experimental stand for ongoing research and experimental measurements are described. The authors consider the resistance of a receiver placed in the electric circuit with thermoelectric elements. Finally, both the analysis of experimental results and conclusions drawn from theoretical findings are presented. Voltage generation of about 1.5 to 2.5 V for the temperature difference from 65 to 85 K was observed when a bismuth telluride thermoelectric couple (traditionally used in cooling technology) was used.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.