Distributed generation by combined heat and power plants (CHP) converting biomass into heat and electrical energy becomes more common in Latvia. More than 60 bio mass plants are in operation. In many cases reductions of revenues from feed-in tariffs for biomass electricity exported into the grid challenges existence of decentralized power system. The focus of this paper is assessment of trigeneration for rural biomass CHP. Trigeneration assume bioenergy conversion in power, heat energy for space heating and cooling by sorption chiller simultaneously. Chilled water usually used for air conditioning. However, in mild climate condition chilled water demand is limited. Therefore, combination of sorption cooling and vapor-compression refrigeration driven by dual source (heat and/or electrical energy) were evaluated with purpose to get break-even cooling temperature for trigeneration introduction. The refrigerant ammonia (R717) is used for associated conventional vapor-compression cycles calculation. Mainly hybrid refrigeration performances are considered for food freezing applications (at evaporation temperature - 10...-200 C and condensing temperature at +10 ...+300 C). Since sorption process consume heat energy at different temperature level rejected heat from various generation technologies like water steam turbine, organic Rankin cycle and internal combustion engine were considered. Energy Analyses of a bio energy based combined cooling, heat and power plant (CCHP) were carried out in order to get the Primary energy saving system indexes for low temperature refrigeration.