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3．供热升温系统设计3．l供热负荷的确定河蟹工厂化育苗生产一般在持年的3～5月份．生产过程中的供热负荷有以卜＞部分：一部分是他水的保温负荷；另一部分是因充气增政jft成的散热损大；再一部分是由于更换新鲜海水淡水引起的加热负荷。育苗水池地水温度，增氧充（及也换新鲜
3. Heating system design 3. l Determination of heating load Crab factory production of seedling generally in the 3 to 5 months. Part of the heat load in the production process is part of his water insulation load; the other part is due to inflated air jr into a large heat loss; the other part is due to the replacement of fresh seawater caused by heating load. Nursery pool ground water temperature, oxygen filling (and also for fresh