Ground heat pump booster sp function-technical indices and rooms indoor climate

The object of the study was heating pump Booster SP and indoor climate provided by floor and ventilation heating. The test site, laboratory of ‘Heating pumps and indoor climate’, was in The Estonian University of Life Sciences Institute of Technology. Heating pump together with ventilation system were set to automatically ensure proper indoor climate. The particularities of the laboratory setting are the alternative depth of the ground collector (1.5 m) and two indoor heating contours with different layouts. The operating parameters of heating pump were measured by thermocouple probes which were placed on the nodes of heating pump. Indoor climate, provided by heating pump Booster SP and ventilation system, was assessed with a diagnostics device which sensors were placed 1.5 m from the floor. The operating state of ground contour, two indoor heating contours, heating pump and indoor climate was diagnosed by simultaneous data accusation. Based on data processing the operating state and efficiency of heating pump, indoor climate’s compliance with laws and legislations was assesse

Musculoskeletal discomfort in production assembly workers

The purpose of this study was to analyse subjective self-evaluation of musculoskeletal discomfort conducted by female production assembly workers. Thirty-seven female assembly workers aged 20–54 years participated in this study, whereas 35 of them were right-handed. Discomfort in neck, shoulder, upper back, upper arm, low back, forearm, wrist, hips, thigh, knees, lower legs and heels was subjectively evaluated by Cornell Musculoskeletal Discomfort Questionnaire. The results indicated that female assembly workers felt most work-related discomfort in the neck (44%), lower back (19.7%) and in the right wrist (15%). Discomfort was less pronounced in the right knee (0.01%), left upper arm (0.04%) and left hip buttocks (0.1%). In conclusion, this study indicated that subjective discomfort sensed by female production assembly workers was higher in the neck, lower back, right shoulder and the right wrist. According to the study results, further research is needed on the relationship between musculoskeletal discomfort and its influence on the quality of assembly work