Tehnički glasnik, Vol. 9 No. 3, 2015.
Izvorni znanstveni članak
Contribution of a Heat Tank to Balancing and Stability of Heating Low-Accumulation Objects
Ante Čikić
; Visoka tehnička škola, Bjelovar, Hrvatska
Sažetak
A low time constant and thermophysical characteristic of low-accumulation objects significantly increases the sensitivity of the inside air temperature in the area of cultivation of agricultural products to external, especially sudden, microclimate changes. Inversely proportional rate of heating and cooling an object considerably reduces the efficiency of the district heating system and the production cost-effectiveness. With custom software support experimental research was conducted in a limited period of time at three objects (GH1, GH2 and GH3) in different locations and the impact of the district heating system on the rate of achieving the mean daily internal air temperature under average external microclimate conditions in the winter period and the technologically most sensitive period for plant cultivation was analyzed and compared with and without a heat tank. By using the accumulated thermal energy from the heat tank, around 50% faster mean values of daily inside air temperature are achieved as compared to the minimally allowed inside air temperature. The consumption of thermal energy and biomass is about 23 % to 28 % higher in the operation of thermal power plants without heat tank, while thermal capacity is about 25 % higher per unit area of the heated area for the same purpose. Direct application of research results contributes to more appropriate sizing and shaping of accumulation heat tanks and a greater efficiency and cost-effectiveness of heat energy systems of low-accumulation objects of various and strict technological requirements.
Ključne riječi
low-accumulation objects; accumulation heat tank; biomass; internal air temperature; heating rate; heating stability
Hrčak ID:
146196
URI
Datum izdavanja:
15.9.2015.
Posjeta: 1.363 *