Zuzana Vranayova, Juraj Kalas and Miroslav Lichner
Since 1989, the efficiency of heat production has increased remarkably, and heat and water consumption have decreased significantly. This is largely due to the liberalization of…
Abstract
Purpose
Since 1989, the efficiency of heat production has increased remarkably, and heat and water consumption have decreased significantly. This is largely due to the liberalization of prices (within 15 years heating prices have increased 25 times, water charges 50 times), legislative changes and the improved quality of administration of residential buildings. The purpose of this case study is to describe actual interventions and experiences from Slovakia's older residential houses. Some associations' efforts in relation to building management of housing estates have achieved such improvements, which are also instructive to advanced countries.
Design/methodology/approach
The paper utilises a case study approach.
Findings
On the basis of detailed analyses of housing estates it can be concluded that their physical condition, due to various structural defects and technical shortcomings, poor workmanship and neglected maintenance, is worse than that corresponding to their age, particularly in panel housing estates. A reduction in energy consumption in existing housing estates can be achieved mainly by taking the measures outlined. A reduction in energy consumption in residential buildings can be achieved effectively only in terms of real economic parameters. Artificially maintained low energy prices did not motivate residents to reduce heat or water consumption. Now that prices have been brought closer to those in other EU countries, the economic effectiveness of rationalization measures for reducing costs in heating residential buildings can be evaluated more objectively. Rationalization measures aimed at reducing energy consumption have proved successful. Building administration associations have transformed to a great extent.
Practical implications
The paper is a very useful source of information and impartial advice for associations wishing to achieve a necessary level of production and supervision.
Originality/value
This paper fulfils an identified information/resource need and offers practical help for the effective management of housing estates.
Details
Keywords
Recent requirements for drive systems in robotic technology, mainly for their performance, performance and weight ratio, compactness with minimal internal structure and with the…
Abstract
Purpose
Recent requirements for drive systems in robotic technology, mainly for their performance, performance and weight ratio, compactness with minimal internal structure and with the integration of main functional parts, lead to intensive application of new, non‐traditional solutions. One of the possible approaches to a non‐traditional solution of drive systems in robotic technology is the application of pneumatic artificial muscle (PAM). The purpose of this paper is to review the designs and applications of the under‐pressure artificial muscle (UPAM) and the creation of non‐standard modules for robotic technology based on PAM.
Design/methodology/approach
Certain part of the disadvantages of an over‐pressure PAM can be solved by the use of an UPAM. As a performance output, UPAM principle guarantees linear movement along the axis with relevant traction force. This UPAM demonstration is evaluated as the drive in mechanic constructions.
Findings
Theoretical calculations, which have been performed, as well as experimental tests and evaluations of the model of this muscle have confirmed an agreement with theoretical relationships valid for PAM generally. The module TMPAM with lengthening action element is principally based on the change of input pressure energy, shape and volume change of action element into output mechanical (power, kinetic) energy. The analysis of the results of measurements (set of measurements, four samples of action element) of the given relationships allows to say that the tractive power F and the lift grow with the change of geometric arrangement of the action element in the box of the driving unit. The output parameters of the TMPAM can be regulated by the number of action elements integrated in the unit (creating two‐element and more‐elemnet parallel sets).
Practical implications
The UPAM maintains all advantages of the principle and recent constructions of the PAM, as well as lightness and compactness of the design. The results confirm that this construction principle of the translation modules is suitable mainly for small lifts, lower load and movements, where even, soft motion is required.
Originality/value
On the basis of author's own solutions of the underpressure artificial muscle (UPAM, original patent) and non‐traditional translation module (TMPAM, original design), the paper evaluates and generalizes the findings obtained from the use of PAM in robot construction.